JP6148128B2 - Ink supply amount adjusting apparatus and method - Google Patents

Description

  The present invention relates to an ink supply amount adjusting apparatus and method for a printing press that includes a plurality of ink fountain keys and adjusts the ink supply amount supplied to printed matter by adjusting the opening of these ink fountain keys.

  FIG. 44 shows a main part of an inker (ink supply device) in each color printing unit in a rotary printing press. In the figure, 1 is an ink fountain, 2 is ink stored in the ink fountain 1, 3 is an ink fountain roller, 4 (4-1 to 4-n) are provided in parallel in the axial direction of the ink fountain roller 3. An ink fountain key, 5 is an ink calling roller, 6 is an ink roller group, 7 is a printing plate, 8 is a plate cylinder on which the printing plate 7 is mounted, and the printing plate 7 has a pattern printed thereon.

  This ink supply device supplies the ink 2 in the ink fountain 1 to the ink fountain roller 3 by adjusting the opening degree of the ink fountain keys 4-1 to 4-n, and the ink supplied to the ink fountain roller 3 is supplied to the ink call roller 5. The ink is supplied to the printing plate 7 through the ink roller group 6 by a calling operation. The ink supplied to the printing plate 7 is printed on printing paper through a rubber cylinder (not shown).

  FIG. 45 shows a printed matter printed by this printing machine. On the printed matter 9, a strip-shaped color bar 9-2 is printed in a blank portion excluding the pattern area 9-1. The color bar 9-2 is a patch for density measurement of each color of cyan, magenta, yellow, and black (solid color patch with a dot area ratio of 100%) 9a1, 9a2, 9a3, 9a4 in the case of general four-color printing. It is comprised from the containing area | region S1-Sn. The areas S1 to Sn correspond to the key zones of the ink fountain keys 4-1 to 4-n in each color printing unit in the printing press.

[Color matching]
A reference density value is preset for each color printing unit. That is, reference density values are set in advance for each color of cyan, magenta, yellow, and black, and when printing the printed material 9, in the printing unit of each color that matches the density value of each color with this reference density value. The opening degree of the ink fountain keys 4-1 to 4-n is adjusted. The opening adjustment of the ink fountain keys 4-1 to 4-n in each color printing unit is not performed based on the density of the density measurement patches 9a (9a1, 9a2, 9a3, 9a4) printed on the printed matter 9. This is performed by the illustrated ink supply amount adjusting device (see, for example, Patent Document 1).

  For example, the region S1 in the printed material 9 will be described as a representative. The density value of the patch 9a for measuring the density of each color of the printed material 9 obtained by the trial printing or the main printing is measured, and the measured density value of each color is previously determined. A density difference from the set reference density value of each color is obtained, and an adjustment value of an opening amount of the ink fountain key 4-1 in each color printing unit (adjustment value of the ink supply amount to the region S1) is obtained from the obtained density difference of each color. ) And multiplying the obtained adjustment value (reference adjustment value) by a unique coefficient (control ratio) to obtain a correction value, and using this correction value as a feedback amount, the opening amount of the ink fountain key 4-1 in each color printing unit Adjust.

  Similarly, for the regions S2 to Sn, the adjustment value of the opening amount of the ink fountain keys 4-2 to 4-n in each color printing unit (adjustment value of the ink supply amount to the regions S2 to Sn) was obtained and obtained. A correction value is obtained by multiplying the adjustment value (reference adjustment value) by the control ratio, and the opening amount of the ink fountain keys 4-2 to 4-n in each color printing unit is adjusted using the obtained correction value as a feedback amount.

Japanese Patent Laid-Open No. 2003-118077 Japanese Patent Laid-Open No. 2003-291312

  However, in the technique disclosed in Patent Document 1 described above, a density measurement patch for each color (solid color patch for each color) is printed on the margin of the printed matter, the density is measured with a densitometer, and the measured density is measured. Because the opening of each ink fountain key for each color is adjusted so that the standard density value stored in advance matches the value, an expensive densitometer must be used, equipment is expensive, and the margin area In addition, a patch for measuring the density of each color has to be printed, and the printing paper is wasted accordingly.

  In addition, because the pattern in the printed material is controlled by replacing the density measurement patch in the margin, even if the density of the density measurement patch reaches the reference density value, the color tone of the pattern in the printed material has been considered. In the end, there is a problem that the operator has to make fine adjustments afterwards, which places a burden on the operator and takes time, and printing materials are wasted accordingly.

  In Patent Document 2, the pattern of a printed material is measured with a color line sensor, and the total value of RGB values within the range corresponding to the ink fountain key of the OK sheet is stored as a reference value. Thereafter, the ink fountain key of the printed material being printed is recorded. A technique has been proposed in which a total value of RGB values in a range corresponding to the above is obtained, compared with a reference value stored in advance in an OK sheet, and the opening amount of each ink fountain key is adjusted according to the difference. However, in the technique of Patent Document 2, cyan, magenta, and yellow inks used in printing do not include only pure RGB components but also include other components as turbidity. Conversion to cyan, magenta, yellow, and black was impossible due to the difference in RGB, and this was not actually possible.

  The present invention has been made to solve such a problem, and the object of the present invention is to avoid burdening the operator without using an expensive densitometer and without wasting printing paper and printing materials. It is an object of the present invention to provide an ink supply amount adjusting apparatus and method capable of performing color matching of printed matter in a short period of time without applying the ink.

  In order to achieve such an object, the present invention provides a plurality of ink fountain keys, and an ink supply amount adjustment device for a printing press that adjusts the ink supply amount supplied to the printed matter by adjusting the opening of these ink fountain keys. Picture data storage means for storing picture data, imaging means for picking up images of printed matter printed by a printing machine, imaging data storage means for storing RGB data of each part of the printed matter taken by the imaging means, and picture data Virtual data calculation means for calculating virtual RGB data of each part of the printed matter from the pattern data and virtual ink film thickness of each part of the printed matter stored in the storage means, and the image data stored in the imaging data storage means RGB data of each part of the printed matter and virtual RGB data of each part of the printed matter calculated by the virtual data calculating means Ink thickness estimation means for estimating the current ink film thickness in the range corresponding to the ink fountain key of the printed image taken from the image, and the current ink in the range corresponding to the ink fountain key of the imaged print estimated by the ink film thickness estimation means And an ink fountain key adjusting means for adjusting an opening degree of the ink fountain key based on the film thickness.

  In the present invention, virtual RGB data of each part of the printed matter is calculated from the pattern data of each part of the printed matter and the virtual ink film thickness. For example, the pattern area ratio of each color (C (cyan pattern area ratio), M (magenta pattern area ratio), Y (yellow pattern area ratio), K (black pattern area ratio))) and ink of each color of the printed material The relationship between film thickness (α (cyan ink film thickness value), β (magenta ink film thickness value), γ (yellow ink film thickness value), σ (black ink film thickness value)) and RGB value Using the determined formula (conversion formula F (C, M, Y, K, α, β, γ, σ) = (R, G, B)), the pattern data (C, M, Y, K) and the virtual ink film thickness (α, β, γ, σ) of each color are used to calculate virtual RGB data of each part of the printed matter.

  In the present invention, the current ink film thickness in a range corresponding to the ink fountain key of the imaged printed matter is estimated from the virtual RGB data of each portion of the printed matter and the RGB data of each portion of the imaged printed matter. For example, the sum of squares of the residual between the RGB data of each part captured in the range corresponding to the ink fountain key and the virtual RGB data of each part of the calculated printed matter is obtained, and the virtual when the residual sum of squares becomes the smallest is obtained. Is estimated as the current ink film thickness in the range corresponding to the ink fountain key of the imaged print. Then, the opening amount of the ink fountain key is adjusted based on the current ink film thickness in the range corresponding to the estimated ink fountain key of the imaged print. For example, the ink film thickness ratio of the current ink film thickness in the range corresponding to the estimated ink fountain key of the imaged print is calculated with respect to the reference ink film thickness, and the reciprocal of this ink film thickness ratio is used as the correction ratio to open the ink fountain key. Adjust the amount.

  According to the present invention, the virtual RGB data of each part of the printed matter is calculated from the pattern data of each part of the printed matter and the virtual ink film thickness, and the RGB data of each part of the captured printed matter and the virtual part of the calculated printed matter are calculated. The current ink film thickness in the range corresponding to the ink fountain key of the imaged print is estimated from the RGB data, and the ink fountain key of the ink fountain key is based on the estimated current ink film thickness in the range corresponding to the ink fountain key of the imaged print. Since the opening amount is adjusted, color matching of printed matter can be performed in a short time without using an expensive densitometer, without wasting printing paper and printing materials, and without burdening the operator. It becomes possible.

It is a block diagram of the ink film thickness control apparatus (ink supply amount adjustment apparatus) used for implementation of this invention. It is a figure which shows the outline of the four-color sheet-fed rotary printing machine containing this ink film thickness control apparatus. It is an enlarged view of the principal part which shows the installation position of the color camera installed in this sheet-fed rotary printing press. It is a figure which divides | segments and shows the content of the memory in an ink film thickness control apparatus. It is a figure which divides | segments and shows the content of the memory in an ink film thickness control apparatus. It is a figure which divides | segments and shows the content of the memory in an ink film thickness control apparatus. It is a figure which divides | segments and shows the content of the memory in an ink film thickness control apparatus. FIG. 6 is a diagram illustrating combinations of cyan, magenta, yellow, and black ink film thickness correction values that are stored in association with address positions. It is a flowchart for demonstrating operation | movement of an ink film thickness control apparatus. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a block diagram which shows the outline of an internal structure of an ink fountain key control apparatus. It is a flowchart which shows the processing operation of an ink fountain key control apparatus. It is a flowchart following FIG. It is a block diagram which shows the outline of an internal structure of an ink fountain roller control apparatus. It is a flowchart which shows the processing operation of an ink fountain roller control apparatus. It is a figure which shows the principal part of the ink supply apparatus in the printing unit of each color in a printing machine. It is a top view which shows the outline of the printed matter printed by the printing machine.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of an ink film thickness control device (ink supply amount adjusting device) used in the practice of the present invention.

  The ink film thickness control apparatus 100 includes a CPU 10, a RAM 11, a ROM 12, an input device 13, a display 14, an output device (printer, etc.) 15, a print start switch 16, a print stop switch 17, a color camera 18, and a driving motor for a printing press. 19, driving motor driver 20, driving motor rotary encoder 21, D / A converter 22, printing machine origin position detector 23, printing machine rotation phase detection counter 24, paper feeder 25, printing unit 26, memory 27, input / output interfaces (I / O, I / F) 28-1 to 28-7 are provided.

  FIG. 2 is a diagram showing an outline of a four-color sheet-fed rotary printing press including the ink film thickness control device 100. In the figure, reference numerals 26-1 to 26-4 denote printing units for respective colors, and the ink supply devices shown in FIG. 44 are provided in the printing units 26-1 to 26-4. Reference numeral 18 denotes a color camera, which is provided in the middle of the transport path of the printed matter printed by the printing units 26-1 to 26-4, as shown in FIG. The image of the printed matter to be sent to is imaged from behind.

  In the ink film thickness control apparatus 100, the CPU 10 obtains various input information given through the interfaces 28-1 to 28-7, and operates according to the program stored in the ROM 12 while accessing the RAM 11 and the memory 27. .

  The drive motor rotary encoder 21 generates a rotation pulse at every predetermined rotation angle of the drive motor 19 of the printing press and outputs the rotation pulse to the drive motor driver 20. The origin position detector 23 of the printing press detects the origin position for each rotation of the printing press, generates an origin position detection signal, and outputs it to the rotation phase detection counter 24 of the printing press.

  4 to 7 show the contents of the memory 27 in a divided manner. The memory 27 is provided with memories M1 to M34. A count value M is stored in the memory M1. A count value N is stored in the memory M2. The memory M3 stores the pattern area ratio of each part of the printed material. The memory M4 stores the number of pixels in the left-right direction of the printed material. The memory M5 stores the number of pixels in the vertical direction of the printed material.

  The memory M6 stores the total value of (C, M, Y, K) in the range corresponding to each ink fountain key. A count value Q is stored in the memory M7. The memory M8 stores a count value L. The memory M9 stores the number of pixels in the left-right direction corresponding to the width of the ink fountain key. The memory M10 stores the total number of pixels within the range corresponding to the ink fountain key. The memory M11 stores a pattern area ratio in a range corresponding to each ink fountain key.

  The memory M12 stores a pattern area ratio-ink fountain key opening amount conversion table. The memory M13 stores the opening amount of each ink fountain key. The memory M14 stores the total number of ink fountain keys for each printing unit. The memory M15 stores the rotation amount of the ink fountain roller of each printing unit. The memory M16 stores the printing speed. The memory M17 stores the count value of the printing press rotation phase detection counter. The memory M18 stores the rotational phase of the printing press.

  The memory M19 stores the imaging timing of the printed material. The memory M20 stores imaging data of each part of the captured printed matter. The memory M21 stores the sum of squares of the minimum residual of RGB. The memory M22 stores the sum of squares of RGB residuals. The memory M23 stores the reference ink film thickness. The memory M24 stores the ink film thickness correction value. The memory M25 stores the corrected ink film thickness. The memory M26 stores a conversion formula F (C, M, Y, K, α, β, γ, σ) = (R, G, B).

  The memory M27 stores the virtual RGB values of each part. The memory M28 stores the squares of the RGB residuals. The memory M29 stores the position of the ink film thickness correction value at the time of the sum of squares of the minimum RGB residuals. The memory M30 stores the total number of ink film thickness correction values. The memory M31 stores the position of the ink film thickness correction value at the time of the sum of squares of the minimum RGB residuals in the range corresponding to each ink fountain key. The memory M32 stores the current ink film thickness. The memory M33 stores the current ink film thickness ratio. The memory M34 stores a correction ratio of the opening amount of each ink fountain key.

  In the conversion formula F (C, M, Y, K, α, β, γ, σ) = (R, G, B)) stored in the memory M26, C is a cyan pattern area ratio, and M is magenta. Y is the yellow pattern area ratio, K is the black pattern area ratio, α is the cyan ink film thickness value, β is the magenta ink film thickness value, γ is the yellow ink film thickness value, and σ is Represents the black ink film thickness. This conversion formula F (C, M, Y, K, α, β, γ, σ) = (R, G, B) is the relationship between the pattern area ratio of each color of the printed matter, the ink film thickness of each color, and the RGB value. Is determined in advance from the RGB absorption characteristics of the inks of each color (cyan, magenta, yellow, black), taking into account the printing order (overlapping order) of cyan, magenta, yellow, and black. Is.

  Further, in the memory M23, the reference value of cyan ink film thickness value α is set as cyan reference ink film thickness value αf, and the reference value of magenta ink film thickness value β is set as magenta reference ink film thickness value βf. Is stored as a yellow reference ink film thickness value γf, and a black ink film thickness value σ is stored as a black reference ink film thickness value σf.

  Further, in the memory M24, as shown in FIG. 8, cyan ink film thickness correction value Δα, magenta ink film thickness correction value Δβ, yellow ink film thickness correction value Δγ, and black ink film thickness correction value Δσ. The combination is stored in association with the address position. In this example, for each of Δα, Δβ, Δγ, and Δσ, −0.1 to +0.1 is the range of the correction value, 0.01 is the step size of the correction value, and Δα, Δβ, Δγ, and Δσ are all. Are stored in association with the address positions.

  In FIG. 1, reference numeral 200 denotes an ink fountain key control device that controls the opening amount of the ink fountain key in the ink supply device, 300 denotes an ink fountain roller control device that drives an ink fountain roller in the ink supply device, and the ink fountain key control device 200 is The ink fountain key is provided for each ink fountain key of each color printing unit, and the ink fountain roller control device 300 is provided for each color printing unit.

[Schematic operation of ink supply control device]
Prior to the description of the detailed operation of the ink film thickness control apparatus 100, the general operation will be described in order to facilitate understanding.

(1) A pattern area ratio (C, M, Y, K) in a range corresponding to each ink fountain key of each color is obtained from (Cnm, Mnm, Ynm, Knm) of each part of PPF (Print Production format) data of a printed matter to be printed. .
(2) From the pattern area ratio (C, M, Y, K) in the range corresponding to each ink fountain key of each color obtained in (1) using the pattern area ratio-ink fountain key opening amount conversion curve, Find the opening amount.
(3) Each ink fountain key of each color is set to the opening amount obtained in (2), and printing is started.
(4) The printed matter printed by the printing machine is imaged with a color camera, and (Rcnm, Gcnm, Bcnm) of each part of the imaged printed matter is obtained.
(5) Using the conversion formula F (C, M, Y, K, α, β, γ, σ) = (R, G, B), the film thickness (α, β, γ, σ) of each color ink Are calculated (virtual) (Rvnm, Gvnm, Bvnm) corresponding to (Cnm, Mnm, Ynm, Knm) of each part of the PPF data when is slightly shifted.
(6) When the value of Σ [(Rcnm−Rvnm) ² + (Gcnm−Gvnm) ² + (Bcnm−Bvnm) ² ] ^{1/2 in} the range corresponding to each ink fountain key is minimized using the least square method The film thickness (αl, βl, γl, σl) of each color ink is obtained.
(7) The ink film thickness ratio with respect to the reference ink film thickness (αf, βf, γf, σf) of the ink film thickness (αl, βl, γl, σl) obtained in (6) is obtained, and this ink film The correction ratio, which is the reciprocal of the thickness ratio, is multiplied by the opening amount of each ink fountain key of each color obtained in (2) to determine the correction opening amount of each ink fountain key of each color.
(8) Each ink fountain key for each color is reset to the corrected opening obtained in (7), and printing is continued.

[Detailed operation of ink film thickness controller]
Hereinafter, detailed processing operations executed by the CPU 10 of the ink film thickness control apparatus 100 will be described with reference to flowcharts shown in FIGS.

[Input of PPF data]
When the PPF data is input to the input device 13 (FIG. 9: YES in step S101), the CPU 10 sets the count value M to 1 (step S102), sets the count value N to 1 (step S103), and from the input device 13 The (C, M, Y, K) data of the pixel at the position (N, M) of the printed material is read, and the read (C, M, Y, K) data is the address position of (N, M) in the memory M3. (Step S104).

  Then, 1 is added to the count value N (step S105), the number of pixels in the left-right direction of the printed matter stored in the memory M4 is read (step S106), and the count value N exceeds the number of pixels in the left-right direction of the printed matter. (YES in step S107), the processes in steps S104 to S107 are repeated.

  When the count value N exceeds the number of pixels in the left-right direction of the printed material (YES in step S107), the CPU 10 adds 1 to the count value M (step S108), and the pixels in the vertical direction of the printed material stored in the memory M5. The number is read (step S109), and the processing of steps S103 to S110 is repeated until the count value M exceeds the number of pixels in the vertical direction of the printed material (YES in step S110).

  Thereby, (C, M, Y, K) data of all the pixels of the printed material, that is, the pattern data of each part of the printed material is stored in the memory M3.

[Set the opening of the ink fountain key]
When the count value M exceeds the number of pixels in the vertical direction of the printed material (YES in step S110), the CPU 10 overwrites all address positions in the memory M6 with zero (FIG. 10: step S111), and sets the count value Q to 1. (Step S112). Further, the count value L is set to 1 (step S113), the count value N is set to 1 (step S114), and the count value M is set to 1 (step S115).

  Then, the (C, M, Y, K) total value of the Lth address position of the Q color in the memory M6 is read (step S116), and the (N, M) address position (Cnm, Q) of the Q color in the memory M3 is read. Mnm, Ynm, Knm) data is read (step S117), and the (C, M, Y, K) total value of the Lth address position of the Q color is added to the (Cnm, Mnm, Ynm, Knm) data is added and overwritten to the Lth address position of the Q color in the memory M6 (step S118).

  Then, 1 is added to the count value M (FIG. 11: step S119), the number of pixels in the vertical direction of the printing press stored in the memory M5 is read (step S120), and the count value M is set in the vertical direction of the printing press. Until the number of pixels is exceeded (YES in step S121), the processes in steps S116 to S121 are repeated.

  When the count value M exceeds the number of pixels in the vertical direction of the printing press (YES in step S121), 1 is added to the count value N (step S122), and the number of pixels in the left-right direction corresponding to the width of the ink fountain key in the memory M9 is determined. Reading (step S123), reading the count value L (step S124), and until the count value N exceeds (the number of pixels in the horizontal direction corresponding to the width of the ink fountain key × count value L) (YES in step S125), step S115 The process of S125 is repeated.

  When the count value N exceeds (the number of pixels in the horizontal direction corresponding to the width of the ink fountain key × count value L) (YES in step S125), the CPU 10 determines (C, M) of the Lth address position of the Q color in the memory M6. , Y, K) The total value is read (step S126), and the total number of pixels within the range corresponding to the ink fountain key stored in the memory M10 is read (step S127). , M, Y, K) The total value is divided by the total number of pixels in the range corresponding to the ink fountain key to obtain the pattern area ratio in the range corresponding to the Lth ink fountain key for the Q color, and the Lth for the Q color in the memory M11 (FIG. 12: Step S128).

  Then, the pattern area ratio in the range corresponding to the Lth ink fountain key of the Q color is read from the Lth address position of the Qth color in the memory M11 (step S129), and the pattern area of the Qth color is read from the address position of the Qth color in the memory M12. The ratio-ink fountain key opening amount conversion table is read (step S130), and the Q-th color pattern area ratio-ink fountain key opening amount conversion table is used to calculate the Q-th color from the pattern area ratio in the range corresponding to the L-th ink fountain key for the Q color. The opening amount of the Lth ink fountain key is obtained and stored in the Lth address position of the Q color in the memory M13 (step S131).

  Then, the opening amount of the Lth ink fountain key for the Q color is transmitted to the Lth ink fountain key control device 200 for the Q color (step S132), and the opening amount of the ink fountain key from the Lth ink fountain key control device 200 for the Q color is received. Wait for transmission of a completion signal (step S133).

  When the reception completion signal of the ink fountain key opening amount is transmitted from the Lth ink fountain key control device 200 for the Q color (YES in step S133), the CPU 10 adds 1 to the count value L (step S134), and the memory The total number of ink fountain keys of each printing unit stored in M14 is read (step S135), and the processing of steps S115 to S136 is repeated until the count value L exceeds the total number of ink fountain keys of each printing unit (FIG. 13: YES in step S136). .

  When the count value L exceeds the total number of ink fountain keys of each printing unit (YES in step S136), the CPU 10 adds 1 to the count value Q (step S137), and until the count value Q becomes Q> 4 (in step S138). YES), the processes of steps S113 to S138 are repeated.

  As a result, for all the ink fountain keys of each color, the pattern area ratio in the range corresponding to the ink fountain key is obtained, and the ink fountain key opening amount corresponding to the pattern area ratio is obtained and stored in the memory M13. It is transmitted to the ink fountain key control device 200.

[Confirmation that the ink fountain key opening amount setting is complete]
When the count value Q becomes Q> 4 (YES in step S138), the CPU 10 sets the count value Q to 1 (step S139), sets the count value L to 1 (step S140), and controls the Lth ink fountain key control device for the Q color. It is confirmed whether a setting completion signal has been transmitted from 200 (step S141).

  If a setting completion signal is transmitted from the Lth ink fountain key control device 200 for the Q color (YES in step S141), 1 is added to the count value L (step S142), and each printing unit stored in the memory M14 is stored. The ink fountain key number is read (step S143), and the processes of steps S141 to S144 are repeated until the count L exceeds the ink fountain key total number of each printing unit (YES in step S144).

  When the count value L exceeds the total number of ink fountain keys of each printing unit (YES in step S144), the CPU 10 adds 1 to the count value Q (step S145), and until the count value Q becomes Q> 4 (in step S146). YES), the process of steps S140 to S146 is repeated. When the count value Q becomes Q> 4 (YES in step S146), an opening amount setting completion signal for all ink fountain keys is transmitted to all ink fountain key control devices 200 (FIG. 14: step S147).

〔printing〕
Next, the operator turns on the print start switch 16. When the print start switch 16 is turned on (YES in step S148), the CPU 10 starts printing.

  In this case, the CPU 10 reads the rotation amount of the ink fountain roller of each printing unit stored in the memory M15 (step S149), and uses the read rotation amount of the ink fountain roller for the ink fountain roller control device 300 of each printing unit. (Step S150), and waits for transmission of the ink fountain roller rotation amount reception completion signal from the ink fountain roller control device 300 of each printing unit (Step S151).

  Upon receiving the ink fountain roller rotation amount reception completion signal from the ink fountain roller control device 300 of each printing unit (YES in step S151), the CPU 10 reads the printing speed stored in the memory M16 (step S152). A rotation command is output to the driving motor driver 20 via the D / A converter 22 (step S153), and the printing machine speed is set as the printing speed. Further, a paper feed command is output to the paper feeder 25 (FIG. 15: Step S154), and paper feeding to the printing press is started. Further, a print command is output to each print unit 26 (step S155).

[Image of printed matter]
During printing, the CPU 10 reads the count value from the rotation phase detection counter 24 of the printing press (step S156), and calculates the rotation phase of the printing press from the read count value of the rotation phase detection counter 24 of the printing press (step S156). Step S157). The read count value of the counter 24 for detecting the rotational phase of the printing press is stored in the memory M17, and the calculated rotational phase of the printing press is stored in the memory M18.

  Then, the CPU 10 reads the imaging timing of the printed matter stored in the memory M19 (step S158), and the processing of steps S156 to S159 until the rotational phase of the printing press becomes the imaging timing of the printing press (YES in step S159). repeat. When the rotational phase of the printing press comes to the imaging timing of the printing press (YES in step S159), an imaging signal is output to the color camera 18 (step S160).

  The color camera 18 receives an image pickup signal from the CPU 10 and picks up an image of a printed material to be sent to the paper discharge unit. Image data of the printed material imaged by the color camera 18 is sent to the CPU 10.

  The CPU 10 receives the imaging data from the color camera 18 (FIG. 16: YES in step S161), sets the count value M to 1 (step S162), sets the count value N to 1 (step S163), and receives the image data from the color camera 18. The (R, G, B) data of the pixel at the position (N, M) is read, and the read (R, G, B) data is stored in the (N, M) address position of the memory M20 (step S164). ).

  Then, 1 is added to the count value N (step S165), the number of pixels in the left-right direction of the printed matter stored in the memory M4 is read (step S166), and the count value N exceeds the number of pixels in the left-right direction of the printed matter. (YES in step S167), the processes in steps S164 to S167 are repeated.

  When the count value N exceeds the number of pixels in the left-right direction of the printed material (YES in step S167), the CPU 10 adds 1 to the count value M (step S168), and the pixels in the vertical direction of the printed material stored in the memory M5. The number is read (step S169), and the processing of steps S163 to S170 is repeated until the count value M exceeds the number of pixels in the vertical direction of the printed material (YES in step S170).

  Thereby, (R, G, B) data of all the pixels of the imaged printed matter, that is, RGB data (actual RGB values) of each part of the imaged printed matter is stored in the memory M20.

[Calculation of the minimum sum of squares of RGB residuals in the range corresponding to each ink fountain key]
[Calculation of virtual RGB values]
When the count value M exceeds the number of pixels in the vertical direction of the printed material (YES in step S170), the CPU 10 sets the count value L to 1 (FIG. 17: step S171) and stores the minimum residual RGB sum of squares. The storage contents of the memory M21 and the memory M22 for storing the residual sum of squares of RGB are set to zero (steps S172 and S173).

  Then, the cyan reference ink film thickness value αf stored in the memory M23 is read (step S174), and the cyan ink film thickness correction value Δα (Δα1) at the first address position stored in the memory M24 is read ( In step S175), the cyan ink film thickness correction value Δα1 at the first address position is added to the cyan reference ink film thickness value αf to obtain the cyan corrected ink film thickness value (αf + Δα1), and the cyan address in the memory M25. Store in the position (step S176).

  Next, the magenta reference ink film thickness value βf stored in the memory M23 is read (step S177), and the magenta ink film thickness correction value Δβ (Δβ1) of the first address position stored in the memory M24 is read. (Step S178), the magenta ink film thickness correction value Δβ1 at the first address position is added to the magenta reference ink film thickness value βf to obtain the magenta corrected ink film thickness value (βf + Δβ1). Store in the address position (FIG. 18: Step S179).

  Next, the yellow reference ink film thickness value γf stored in the memory M23 is read (step S180), and the yellow ink film thickness correction value Δγ (Δγ1) at the first address position stored in the memory M24 is read. (Step S181) The yellow ink film thickness correction value Δγ1 at the first address position is added to the yellow reference ink film thickness value γf to obtain the yellow corrected ink film thickness value (γf + Δγ1). Store in the address position (step S182).

  Next, the black reference ink film thickness value σf stored in the memory M23 is read (step S183), and the black ink film thickness correction value Δσ (Δσ1) at the first address position stored in the memory M24 is read. (Step S184) The black ink film thickness correction value Δσ1 at the first address position is added to the black reference ink film thickness value σf to obtain the black corrected ink film thickness value (σf + Δσ1). Store in the address position (step S185).

  The CPU 10 reads the number of pixels in the left-right direction corresponding to the width of the ink fountain key stored in the memory M9 (FIG. 19: Step S186), reads the count value L (Step S187), and sets the count value N to (1+ ( (The number of pixels in the horizontal direction corresponding to the width of the ink fountain key) × (count value L−1)) (step S188), the count value M is set to 1 (step S189), and the (N, M) address position of the memory M3 , (N, M) (Cnm, Mnm, Ynm, Knm) data is read (step S190).

  Then, corrected ink film thickness values (αf + Δα1), (βf + Δβ1), (γf + Δγ1), (σf + Δσ1) for cyan, magenta, yellow, and black are calculated from the Lth address positions of cyan, magenta, yellow, and black in the memory M25. Read (step S191), read the conversion formula F (C, M, Y, K, α, β, γ, σ) = (R, G, B) stored in the memory M26 (step S192) Using the formula F (C, M, Y, K, α, β, γ, σ) = (R, G, B), (Cnm, Mnm, Ynm, Knm) data at the position (N, M) and , Cyan, magenta, yellow, black corrected ink film thickness values (αf + Δα1), (βf + Δβ1), (γf + Δγ1), (σf + Δσ1), and the virtual RGB values (Rvnm, Gvnm, Bvnm) is obtained and stored in the (N, M) address position of the memory M27 (FIG. 20: Step S193).

[Calculation of the square of RGB residuals]
Next, the CPU 10 reads the RGB values (Rcnm, Gcnm, Bcnm) of the (N, M) position of the printed matter taken from the (N, M) address position of the memory M20 (step S194), and this read image pickup From the RGB values (Rcnm, Gcnm, Bcnm) at the position (N, M) of the printed matter and the virtual RGB values (Rvnm, Gvnm, Bvnm) at the position (N, M) obtained in step S193, (N , M) is determined as [(Rcnm−Rvnm) ² + (Gcnm−Gvnm) ² + (Bcnm−Bvnm) ² ] ^{1/2 and} the square of the RGB residual at the position of (N, M). The square of the residual RGB of the position is stored in the memory M28 (step S195).

[Calculation of sum of squares of RGB residuals in the range corresponding to the ink fountain key]
The CPU 10 reads the sum of squares of the RGB residuals stored in the memory M22 (step S196), and the read sum of squares of the RGB residuals at the position of (N, M) obtained in step S195. The squares of the RGB residuals are added and overwritten in the memory M22 as the sum of squares of the RGB residuals (step S197). Here, since the sum of squares of the RGB residuals in the memory M22 is set to zero in the previous step S173, the squares of the RGB residuals at the position (N, M) obtained in step S195 are RGB. Is the sum of squared residuals.

  Next, the CPU 10 adds 1 to the count value M (step S198), reads the number of pixels in the vertical direction of the printed material stored in the memory M5 (step S199), and the count value M is a pixel in the vertical direction of the printed material. Until the number is reached (FIG. 21: YES in step S200), the processes in steps S190 to S200 are repeated.

  When the count value M reaches the number of pixels in the vertical direction of the printed material (YES in step S200), the CPU 10 adds 1 to the count value N (step S201), and the left and right corresponding to the width of the ink fountain key stored in the memory M9. The number of pixels in the direction is read (step S202), the count value L is read (step S203), and the count value N exceeds (the number of pixels in the horizontal direction corresponding to the width of the ink fountain key × count value L) (in step S204). YES), the process of steps S189 to S204 is repeated.

  When the count value N exceeds (number of pixels in the horizontal direction corresponding to the width of the ink fountain key × count value L) (YES in step S204), the CPU 10 reads the square sum of the RGB residuals stored in the memory M22. (Step S205) The read sum of squares of RGB residuals is stored in the memory M21 as the first sum of squares of the minimum residual RGB (Step S206). Further, 1 is written in the memory M29 as the position of the ink film thickness correction value at the time of the sum of squares of the minimum RGB residuals (step S207).

  In other words, L = L = obtained using a combination of the RGB value (actual RGB value) of each pixel in the range corresponding to the first ink fountain key and the ink film thickness correction value at the first address position in the memory M24. The sum of squares of the residuals with the virtual RGB values of each pixel in the range corresponding to the first ink fountain key is obtained, and the sum of the squares of the residuals is the minimum of the first RGB in the range corresponding to the first ink fountain key. While storing the residual sum of squares, the address position of the combination of the ink film thickness correction values in the memory M24 used at that time is L = the minimum residual sum of squares of RGB in the range corresponding to the first ink fountain key. Is stored as the position of the ink film thickness correction value.

[Replacement of the sum of squares of the minimum residual RGB in the range corresponding to the ink fountain key]
Next, the CPU 10 sets the count value Q to 2 (FIG. 22: step S208), and sets the square of the RGB residual stored in the memory M22 to zero (step S209).

  Then, the cyan reference ink film thickness value αf stored in the memory M23 is read (step S210), and the cyan ink film thickness correction value Δα (Δαq) at the Qth address position stored in the memory M24 is read. (Step S211) The cyan ink film thickness correction value Δαq at the Qth address position is added to the cyan reference ink film thickness value αf to obtain the cyan corrected ink film thickness value (αf + Δαq), and cyan in the memory M25. Is stored in the address position (step S212).

  Next, the magenta reference ink film thickness value βf stored in the memory M23 is read (step S213), and the magenta ink film thickness correction value Δβ (Δβq) stored in the memory M24 at the Qth address position is read. Reading (step S214), the magenta ink film thickness correction value Δβq at the Qth address position is added to the magenta reference ink film thickness value βf, and the magenta corrected ink film thickness value (βf + Δβq) is obtained. Store in the magenta address position (step S215).

  Next, the yellow reference ink film thickness value γf stored in the memory M23 is read (FIG. 23: step S216), and the yellow ink film thickness correction value Δγ (Q (address) stored in the memory M24 is stored. (Δγq) is read (step S217), the yellow ink film thickness correction value Δγq at the Qth address position is added to the yellow reference ink film thickness value γf, and the yellow corrected ink film thickness value (γf + Δγq) is obtained. The data is stored in the yellow address position of the memory M25 (step S218).

  Next, the black reference ink film thickness value σf stored in the memory M23 is read (step S219), and the black ink film thickness correction value Δσ (Δσq) at the Qth address position stored in the memory M24 is read. Reading (step S220), the black ink film thickness correction value Δσq at the Qth address position is added to the black reference ink film thickness value σf to obtain the black corrected ink film thickness value (σf + Δσq), and the memory M25 The information is stored in the black address position (step S221).

  The CPU 10 reads the number of pixels in the horizontal direction corresponding to the width of the ink fountain key stored in the memory M9 (step S222), reads the count value L (step S223), and sets the count value N to (1+ (width of the ink fountain key). (The number of pixels in the horizontal direction corresponding to) × (count value L−1)) (FIG. 24: step S224), the count value M is set to 1 (step S225), and the address position of (N, M) in the memory M3 , (N, M) (Cnm, Mnm, Ynm, Knm) data is read (step S226).

  Then, corrected ink film thickness values (αf + Δαq), (βf + Δβq), (γf + Δγq), (σf + Δσq) of cyan, magenta, yellow, and black are calculated from the Lth address positions of cyan, magenta, yellow, and black in the memory M25. Read (step S227), read the conversion formula F (C, M, Y, K, α, β, γ, σ) = (R, G, B) stored in the memory M26 (step S228) Using the formula F (C, M, Y, K, α, β, γ, σ) = (R, G, B), (Cnm, Mnm, Ynm, Knm) data at the position (N, M) and , Cyan, magenta, yellow, black corrected ink film thickness values (αf + Δαq), (βf + Δβq), (γf + Δγq), (σf + Δσq), and a virtual RGB value (Rvnm, Gvnm, Bvnm) is obtained and stored in the (N, M) address position of the memory M27 (step S229).

Next, the CPU 10 reads the RGB values (Rcnm, Gcnm, Bcnm) of the (N, M) position of the printed matter imaged from the (N, M) address position of the memory M20 (step S230), and this read imaging From the RGB values (Rcnm, Gcnm, Bcnm) at the position (N, M) of the printed matter and the virtual RGB values (Rvnm, Gvnm, Bvnm) at the position (N, M) obtained in step S229, (N , M) is determined as [(Rcnm−Rvnm) ² + (Gcnm−Gvnm) ² + (Bcnm−Bvnm) ² ] ^{1/2 and} the square of the RGB residual at the position of (N, M). The square of the residual RGB of the position is stored in the memory M28 (step S231).

  Then, the sum of squares of the RGB residuals stored in the memory M22 is read (FIG. 25: Step S232), and the position of the position (N, M) obtained in Step S231 is obtained as the read sum of squares of the RGB residuals. The squares of the RGB residuals are added and overwritten on the square sum of the RGB residuals in the memory M22 (step S233). Here, since the sum of squares of the RGB residuals in the memory M22 is set to zero in the previous step S209, the squares of the RGB residuals at the position (N, M) obtained in step S231 are RGB. Is the sum of squared residuals.

  Next, the CPU 10 adds 1 to the count value M (step S234), reads the number of pixels in the vertical direction of the printed material stored in the memory M5 (step S235), and the count value M is the pixel in the vertical direction of the printed material. Until the number is reached (YES in step S236), the processes in steps S226 to S236 are repeated.

  When the count value M reaches the number of pixels in the vertical direction of the printed material (YES in step S236), the CPU 10 adds 1 to the count value N (step S237), and the left and right corresponding to the width of the ink fountain key stored in the memory M9. The number of pixels in the direction is read (step S238), the count value L is read (step S239), and the count value N exceeds (the number of pixels in the horizontal direction corresponding to the width of the ink fountain key × count value L) (in step S240). YES), the process of steps S225 to S240 is repeated.

  When the count value N exceeds (the number of pixels in the horizontal direction corresponding to the width of the ink fountain key × the count value L) (YES in step S240), the minimum sum of squares of RGB stored in the memory M21 is determined. (FIG. 26: step S241), and the residual sum of squares of RGB stored in the memory M22 is read (step S242), and the two are compared (step S243).

  Here, if the sum of squares of the RGB residuals stored in the memory M22 is smaller than the sum of squares of the minimum residuals of RGB stored in the memory M21 (YES in step S243), that is, L = L = RGB in the range corresponding to the first ink fountain key L = the first ink fountain key determined using the combination of the ink thickness correction values next to the minimum residual sum of squares of the first RGB in the range corresponding to the first ink fountain key If the residual sum of squares is smaller, the residual sum of squares of RGB in the range corresponding to the first ink fountain key obtained using the following combination of ink film thickness correction values is calculated as a new L = The minimum residual sum of squares in the range corresponding to the first ink fountain key is stored in the memory M21 (step S244).

  Then, the count value Q at that time is read (step S245), and overwritten in the memory M29 as the position of the ink film thickness correction value at the time of the sum of squares of the RGB minimum residuals (step S246). In step S247, 1 is added to the count value Q.

  If the minimum sum of squares of RGB stored in the memory M21 is less than or equal to the sum of squares of RGB residuals stored in the memory M22 (NO in step S243), that is, L = 1. The minimum residual sum of squares of the first RGB in the range corresponding to the ink fountain key is obtained using the combination of the following ink film thickness correction values. L = the residual of RGB in the range corresponding to the first ink fountain key If it is less than or equal to the square sum, the processing of steps S244 to S246 is not executed, and the process immediately proceeds to step S247.

  After adding 1 to the count value Q in step S247, the CPU 10 reads the total correction value of the ink film thickness stored in the memory M30 (step S248), and the count value Q exceeds the total correction value of the ink film thickness. Until (FIG. 27: YES in step S249), the processes in steps S209 to S249 are repeated.

  As a result, for all combinations of ink film thickness correction values stored in the memory M24, the sum of squares of RGB residuals in a range corresponding to the first ink fountain key is obtained, and the obtained RGB residuals are obtained. The smallest value (minimum value) of the square sum of the differences is left in the memory M21. In addition, the count value Q when the minimum value of the sum of squares of the RGB residuals is obtained in the memory M29 is left as the position of the ink film thickness correction value at the time of the sum of squares of the minimum residuals of RGB. It becomes.

[Estimation of the current ink film thickness in the range corresponding to the ink fountain key]
When the count value Q exceeds the total number of correction values for ink film thickness (YES in step S249), the CPU 10 determines the position of the ink film thickness correction value at the time of the sum of squares of the minimum RGB residuals stored in the memory M29. Reading (step S250), reading the count value L (step S251), and the position of the ink film thickness correction value at the sum of the squares of the minimum RGB read from the memory M29 at the Lth address position of the memory M31 Is written (step S252). Here, the ink film thickness correction value in the memory M24 used for the calculation of the minimum value of the sum of squares of the RGB residuals in the range corresponding to the L = 1st ink fountain key, corresponding to the L = 1st ink fountain key. The address position of the combination is written.

  Then, the CPU 10 adds 1 to the count value L (step S253), reads the total number of ink fountain keys of each printing unit stored in the memory M14 (step S254), and the count value L exceeds the total number of ink fountain keys of each printing unit. Until (YES in step S255), the processes in steps S172 to S255 are repeated.

  As a result, the combination of the ink film thickness correction values in the memory M24 used for the calculation of the minimum value of the sum of squares of the RGB residuals in the range corresponding to the ink fountain key is stored in the memory M31. The address location will be written.

  When the count value L exceeds the total number of ink fountain keys of each printing unit (YES in step S255), the CPU 10 sets the count value L to 1 (FIG. 28: step S256), and starts from the Lth address position stored in the memory M31. The position of the ink film thickness correction value at the time of the sum of squares of the minimum RGB residuals in the range corresponding to the Lth ink fountain key is read (step S257).

  Then, the cyan ink film thickness correction value Δα (Δαl) is read from the address position of the ink film thickness correction value at the time of the sum of squares of the minimum RGB residuals in the range corresponding to the Lth ink fountain key in the memory M24. (Step S258). That is, the cyan ink film thickness correction value Δαl used to calculate the minimum value of the square sum of the RGB residuals in the range corresponding to the Lth ink fountain key is read.

  The cyan reference ink film thickness value αf stored in the memory M23 is read (step S259), and the cyan ink film thickness correction value Δαl read in step S258 is added to the cyan reference ink film thickness value αf. Thus, the current ink film thickness value (αf + Δαl) in the range corresponding to the cyan L-th ink fountain key is obtained and stored in the cyan L-th address position of the memory M32 (step S260).

  Then, the current ink film thickness value (αf + Δαl) in the range corresponding to the cyan L-th ink fountain key obtained in step S260 is divided by the cyan reference ink film thickness value αf to correspond to the cyan L-th ink fountain key. The current ink film thickness ratio in the range is obtained and stored in the cyan Lth address position in the memory M33 (step S261).

  Next, the CPU 10 reads the position of the ink film thickness correction value at the time of the sum of squares of the minimum RGB RGB in the range corresponding to the Lth ink fountain key from the Lth address position stored in the memory M31 (FIG. 29: Step S262). Then, the magenta ink film thickness correction value Δβ (Δβl) is read from the position of the ink film thickness correction value at the time of the square sum of the minimum RGB residuals in the range corresponding to the Lth ink fountain key in the memory M24 (step S263). ). That is, the magenta ink film thickness correction value Δβl used for calculating the minimum value of the square sum of the RGB residuals in the range corresponding to the Lth ink fountain key is read.

  The magenta reference ink film thickness value βf stored in the memory M23 is read (step S264), and the magenta ink film thickness correction value Δβl read in step S263 is added to the magenta reference ink film thickness value βf. Thus, the current ink film thickness value (βf + Δβl) in the range corresponding to the m-th magenta ink fountain key is obtained and stored in the m-th address position of magenta in the memory M32 (step S265).

  Next, the present ink film thickness value (βf + Δβl) in the range corresponding to the magenta Lth ink fountain key obtained in step S265 is divided by the magenta reference ink film thickness value βf to correspond to the magenta Lth ink fountain key. The current ink film thickness ratio in the range to be processed is obtained and stored in the Lth address position of magenta in the memory M33 (step S266).

  Next, the CPU 10 reads the position of the ink film thickness correction value at the time of the sum of squares of the smallest RGB residuals in the range corresponding to the L-th ink fountain key from the L-th address position stored in the memory M31 (Step S1). S267). Then, the yellow ink film thickness correction value Δγ (Δγl) is read from the position of the ink film thickness correction value at the time of the square sum of the minimum RGB residuals in the range corresponding to the Lth ink fountain key in the memory M24 (step S268). ). That is, the yellow ink film thickness correction value Δγl used in the calculation of the minimum value of the square sum of the RGB residuals in the range corresponding to the Lth ink fountain key is read.

  Then, the yellow reference ink film thickness value γf stored in the memory M23 is read (step S269), and the yellow ink film thickness correction value Δγl read in step S268 is added to the yellow reference ink film thickness value γf. Then, the current ink film thickness value (γf + Δγl) in the range corresponding to the yellow Lth ink fountain key is obtained and stored in the yellow Lth address position of the memory M32 (step S270).

  Then, the current ink film thickness value (γf + Δγl) in the range corresponding to the yellow L-th ink fountain key obtained in step S270 is divided by the yellow reference ink film thickness value γf to correspond to the yellow L-th ink fountain key. The current ink film thickness ratio in the range is obtained and stored in the Lth address position of yellow in the memory M33 (step S271).

  Next, the CPU 10 reads the position of the ink film thickness correction value at the time of the sum of squares of the minimum RGB RGB in the range corresponding to the Lth ink fountain key from the Lth address position stored in the memory M31 (FIG. 31: Step S272). Then, the black ink film thickness correction value Δσ (Δσl) is read from the position of the ink film thickness correction value at the time of the sum of squares of the minimum RGB residuals in the range corresponding to the Lth ink fountain key in the memory M24 (step S273). ). That is, the black ink film thickness correction value Δσl used for the calculation of the minimum value of the square sum of the RGB residuals in the range corresponding to the Lth ink fountain key is read.

  The black reference ink film thickness value σf stored in the memory M23 is read (step S274), and the black ink film thickness correction value Δσl read in step S273 is added to the black reference ink film thickness value σf. The current ink film thickness value (σf + Δσl) in the range corresponding to the black Lth ink fountain key is obtained and stored in the black Lth address position of the memory M32 (step S275).

  Then, the current ink film thickness value (σf + Δσl) in the range corresponding to the black Lth ink fountain key obtained in step S275 is divided by the black reference ink film thickness value σf to correspond to the black Lth ink fountain key. The current ink film thickness ratio in the range is obtained and stored in the Lth address position of black in the memory M33 (step S276).

[Adjustment of ink fountain key opening]
Next, the CPU 10 reads the current ink film thickness ratio in the range corresponding to the L-th ink fountain key of cyan from the L-th address position of cyan in the memory M33 (FIG. 32: step S277). The reciprocal of the current ink film thickness ratio in the range corresponding to the th ink fountain key is stored as the correction ratio in the cyan Lth address position of the memory M34 (step S278).

  Then, the opening amount of the cyan L-th ink fountain key is read from the cyan L-th address position in the memory M13 (step S279), and the cyan L-th ink fountain key opening amount thus read is calculated in step S278. The correction ratio of the range corresponding to the first ink fountain key is multiplied to obtain the corrected opening amount of the cyan Lth ink fountain key, and overwritten on the cyan Lth address position in the memory M13 (step S280).

  Then, the corrected opening amount of the Lth ink fountain key is read from the cyan Lth address position of the memory M13 (step S281), and the corrected opening amount of the read Lth ink fountain key is read as the cyan Lth ink fountain key control device. 200 (step S282), and waits for transmission of a reception completion signal of the ink fountain key opening amount from the cyan L-th ink fountain key control device 200 (FIG. 33: step S283).

  When the CPU 10 receives a reception completion signal of the ink fountain key opening amount from the cyan L-th ink fountain key control device 200 (YES in step S283), the CPU 10 determines the Lth magenta address from the Lth address position of magenta in the memory M33. The current ink film thickness ratio in the range corresponding to the ink fountain key is read (step S284), and the reciprocal of the current ink film thickness ratio in the range corresponding to the L-th ink fountain key in the read magenta is used as the correction ratio. Is stored in the Lth address position (step S285).

  Then, the opening amount of the magenta L-th ink fountain key is read from the magenta L-th address position of the memory M13 (step S286), and the magenta L-th ink fountain key opening amount thus read is determined as the magenta L-thickness obtained in step S285. The correction ratio of the range corresponding to the first ink fountain key is multiplied to determine the corrected opening amount of the magenta Lth ink fountain key, and the magenta Lth address position in the memory M13 is overwritten (step S287).

  Then, the corrected opening amount of the Lth ink fountain key is read from the Lth address position of the magenta in the memory M13 (step S288), and the corrected opening amount of the read Lth ink fountain key is read out. 200 (step S289) and waits for transmission of a reception completion signal of the ink fountain key opening amount from the m-th magenta ink fountain key control device 200 (FIG. 34: step S290).

  When the CPU 10 receives an ink fountain key opening completion signal from the magenta Lth ink fountain key control device 200 (YES in step S290), the CPU 10 determines that the yellow Lth address from the yellow Lth address position in the memory M33. The current ink film thickness ratio in the range corresponding to the ink fountain key is read (step S291), and the reciprocal of the current ink film thickness ratio in the range corresponding to the read Lth ink fountain key of yellow is read as the correction ratio. Is stored in the Lth address position (step S292).

  Then, the opening amount of the yellow L-th ink fountain key is read from the yellow L-th address position of the memory M13 (step S293), and the yellow L-th ink fountain key opening amount read in step S292 is read as the opening amount of the yellow L-th ink fountain key. The correction ratio of the range corresponding to the first ink fountain key is multiplied to obtain the corrected opening amount of the yellow L-th ink fountain key, and the yellow L-th address position in the memory M13 is overwritten (step S294).

  Then, the corrected opening amount of the Lth ink fountain key is read from the yellow Lth address position of the memory M13 (step S295), and the corrected opening amount of the read Lth ink fountain key is read as the yellow Lth ink fountain key control device. 200 (step S296), and waits for transmission of a reception completion signal of the ink fountain key opening amount from the L-th ink fountain key control device 200 for yellow (FIG. 35: step S297).

  When the reception completion signal of the ink fountain key opening amount is transmitted from the yellow Lth ink fountain key control device 200 (YES in step S297), the CPU 10 determines that the black Lth address from the black Lth address position in the memory M33. The current ink film thickness ratio in the range corresponding to the ink fountain key is read (step S298), and the reciprocal of the current ink film thickness ratio in the range corresponding to the read L-th ink fountain key is used as the correction ratio, and black in the memory M34. Is stored in the Lth address position (step S299).

  Then, the opening amount of the black L-th ink fountain key is read from the black L-th address position of the memory M13 (step S300), and the black L-th ink fountain key opening amount thus read is calculated in step S299. The correction ratio of the range corresponding to the first ink fountain key is multiplied to obtain the corrected opening amount of the black Lth ink fountain key, and overwritten on the black Lth address position of the memory M13 (step S301).

  Then, the corrected opening amount of the Lth ink fountain key is read from the Lth address position of black in the memory M13 (step S302), and the corrected opening amount of the read Lth ink fountain key is read. 200 (step S303), and waits for the transmission completion signal of the ink fountain key opening amount from the black Lth ink fountain key control device 200 (FIG. 36: step S304).

  When the reception completion signal of the ink fountain key opening amount is transmitted from the black Lth ink fountain key control device 200 (YES in step S304), the CPU 10 adds 1 to the count value L (step S305), and stores it in the memory M14. The stored total number of ink fountain keys for each printing unit is read (step S306), and the processes of steps S257 to S307 are repeated until the count value L exceeds the total number of ink fountain keys for each printing unit (YES in step S307).

  As a result, for all ink fountain keys of each color, the current ink film thickness ratio in the range corresponding to the ink fountain key is obtained, and the correction ratio is obtained as the reciprocal of this ink film thickness ratio, and the opening amount corrected with this correction ratio Is stored in the memory M13 and transmitted to the corresponding ink fountain key control device 200.

[Confirmation that the ink fountain key opening amount setting is complete]
When the count value L exceeds the total number of ink fountain keys of each printing unit (YES in step S307), the CPU 10 sets the count value Q to 1 (step S308), sets the count value L to 1 (step S309), and sets the Lth color for the Q color. It is confirmed whether or not a setting completion signal has been transmitted from the ink fountain key control device 200 (FIG. 37: step S310).

  If a setting completion signal is transmitted from the Lth ink fountain key control device 200 for the Q color (YES in step S310), 1 is added to the count value L (step S311), and each printing unit stored in the memory M14 is stored. Are read (step S312), and the processes of steps S310 to S313 are repeated until the count value L exceeds the total number of ink fountain keys of each printing unit (YES in step S313).

  When the count value L exceeds the total number of ink fountain keys of each printing unit (YES in step S313), the CPU 10 adds 1 to the count value Q (step S314), and until the count value Q becomes Q> 4 (in step S315). YES), the processing of steps S309 to S315 is repeated. When the count value Q becomes Q> 4 (YES in step S315), all ink fountain key opening amount setting completion signals are transmitted to all ink fountain key control devices 200 (FIG. 38: step S316).

  The CPU 10 repeats the processes of steps S156 to S317 described above until the print stop switch 17 is turned on (YES in step S317).

  When the print stop switch 17 is turned on (YES in step S317), the CPU 10 outputs a print stop command to the print unit 26 (step S318), and outputs a paper feed stop command to the paper feeder 25 (step S319). ). Further, the rotation amount of the ink fountain roller = zero (stop command) is transmitted to each ink fountain roller control device 300 (step S320). Then, it is confirmed that the ink fountain roller rotation amount reception completion signal has been transmitted from each ink fountain roller control device 300 (YES in step S321), and a stop command is output to the driving motor driver 20 (step S313). Stop the press.

[Ink fountain key control device]
FIG. 39 shows an outline of the internal configuration of the ink fountain key control device 200 (200-1 to 200-n). The ink fountain key control device 200 includes a CPU 201, a RAM 202, a ROM 203, an ink fountain key drive motor 204, an ink fountain key drive motor driver 205, an ink fountain key drive motor rotary encoder 206, a counter 207, and an input / output interface (I / O, I / F) 208. , 209 and memories 210 to 213, and is connected to the ink film thickness control apparatus 100 via the interface 208. The memory 210 stores the received ink fountain key opening amount. The memory 211 stores a target ink fountain key opening amount. The memory 212 stores the count value of the counter 207. The memory 213 stores the current opening degree of the ink fountain key.

  When the ink fountain key opening amount is sent from the ink film thickness control device 100 (FIG. 40: YES in step S401), the CPU 201 stores the received opening amount in the memory 210 (step S402) and the ink film thickness. An ink fountain key opening amount reception completion signal is transmitted to the control device 100 (step S403). Further, the received opening amount of the ink fountain key is stored in the memory 211 as a target opening amount (step S404).

  The count value of the counter 207 is read and stored in the memory 212 (step S405). The current ink fountain key opening amount is obtained from the read count value of the counter 207 and stored in the memory 213 (step S406). The target ink fountain key opening amount is read out from (step S407). If the current ink fountain key opening amount is the same as the target opening amount (YES in step S408), the process immediately proceeds to step S417 (FIG. 41), A setting completion signal for the ink fountain key opening amount is output to the film thickness controller 100.

  If the current ink fountain key opening amount is not the same as the target opening amount (NO in step S408), the ink fountain key driving motor 204 is driven until the current ink fountain key opening amount is the same as the target opening amount. Thereafter (FIG. 41: steps S409 to S416), an ink fountain key opening amount setting completion signal is output to the ink film thickness control apparatus 100 (step S417).

  That is, if the current ink fountain key opening amount is smaller than the target opening amount (YES in step S409), a forward rotation command is sent to the ink fountain key driving motor driver 205 (step S410), and the count value is obtained from the counter 207. Reading (step S412), the current ink fountain key opening amount is calculated from the count value (step S413), the target ink fountain key opening amount is read from the memory 211 (step S414), and the current ink fountain key opening amount is the target. Steps S412 to S415 are repeated until the opening degree of the ink fountain key matches (YES in Step S415).

  If the current ink fountain key opening amount is larger than the target opening amount (NO in step S409), a reverse rotation command is sent to the ink fountain key driving motor driver 205 (step S411), and the count value is read from the counter 207. (Step S412), the current ink fountain key opening amount is calculated from the count value (step S413), and the target ink fountain key opening amount is read from the memory 211 (step S414). Steps S412 to S415 are repeated until the ink fountain key opening amount matches (YES in Step S415).

  If the current ink fountain key opening amount matches the target ink fountain key opening amount in step S415 (YES in step S415), a stop command is output to the ink fountain key drive motor driver 205 (step S416), and the ink film thickness is increased. A setting completion signal for the ink fountain key opening amount is output to the control device 100 (step S417).

  When the ink fountain key opening amount setting completion signal is output to the ink film thickness control device 100 (step S417), the CPU 201 receives the ink fountain key opening amount setting completion signal from the ink film thickness control device 100 (step S418). YES), the output of the ink fountain key opening amount setting completion signal to the ink film thickness controller 100 is stopped (step S419).

[Ink fountain roller control device]
FIG. 42 shows an outline of the internal configuration of the ink fountain roller control device 300. The ink fountain roller control device 300 includes a CPU 301, a RAM 302, a ROM 303, an ink fountain roller driving motor 304, an ink fountain roller driving motor driver 305, an ink fountain roller driving motor rotary encoder 306, an input / output interface (I / O, I / F) 307, 308 and memories 309, 310, and is connected to the ink film thickness controller 100 via the interface 307. The memory 309 stores the received rotation amount of the ink fountain roller. The memory 310 stores a target rotation amount of the ink fountain roller.

  When the rotation amount of the ink fountain roller is sent from the ink film thickness controller 100 (FIG. 43: YES in step S501), the CPU 301 stores the received rotation amount in the memory 309 (step S502). Further, the ink fountain roller rotation amount reception completion signal is transmitted to the ink film thickness control apparatus 100 (step S503). The received rotation amount of the ink fountain roller is stored in the memory 310 as the rotation amount of the ink fountain roller (target rotation amount) (step S504). Then, the target rotation amount is read from the memory 310 (step S505), sent to the ink fountain roller driving motor driver 305, and the rotation amount of the ink fountain roller driving motor 304 is adjusted to the target rotation amount (step S506).

[Extension of the embodiment]
The present invention has been described above with reference to the embodiment. However, the present invention is not limited to the above embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the technical idea of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Ink fountain, 2 ... Ink, 3 ... Ink fountain roller, 4 (4-1 to 4-n) ... Ink fountain key, 5 ... Ink calling roller, 6 ... Ink roller group, 7 ... Printing plate, 8 ... Plate cylinder, 9 ... printed matter, 10 ... CPU, 11 ... RAM, 12 ... ROM, 13 ... input device, 14 ... display, 15 ... output device (printer, etc.), 16 ... print start switch, 17 ... print stop switch, 18 ... color camera , 19 ... motive motor of the printing press, 20 ... motive motor driver, 21 ... rotary encoder for the motive motor, 22 ... D / A converter, 23 ... origin position detector of the printing press, 24 ... for rotation phase detection of the printing press Counter, 25 ... Paper feeding device, 26 ... Printing unit, 27 ... Memory, 28-1 to 28-7 ... Input / output interface (I / O, I / F), M1-M34 ... Memory, 100 ... Ink film Controller, 200 (200-11～200-4N) ... ink fountain key control device 300 (300-1 to 300-4) ... ink fountain roller control device.

Claims (10)

In an ink supply amount adjusting device of a printing press that includes a plurality of ink fountain keys and adjusts the amount of ink supplied to printed matter by adjusting the opening of these ink fountain keys.
Pattern data storage means for storing pattern data of each part of the printed matter;
Imaging means for imaging a picture of a printed matter printed by the printing machine;
Imaging data storage means for storing RGB data of each part of the printed matter imaged by the imaging means;
Virtual data calculation means for calculating virtual RGB data of each part of the printed matter from the pattern data and virtual ink film thickness of each part of the printed matter stored in the pattern data storage means;
Range corresponding to the ink fountain key of the printed matter imaged from the RGB data of each part of the imaged printed matter stored in the imaging data storage means and the virtual RGB data of each part of the printed matter calculated by the virtual data calculating means An ink film thickness estimation means for estimating the current ink film thickness,
An ink supply comprising: an ink fountain key adjusting unit that adjusts an opening amount of the ink fountain key based on a current ink film thickness in a range corresponding to the ink fountain key of the imaged print estimated by the ink film thickness estimating unit. Quantity adjustment device. In the ink supply amount adjusting device according to claim 1,
The ink film thickness estimating means is
Obtain the sum of squares of the residuals of the RGB data of each part of the imaged printed matter in the range corresponding to the ink fountain key and the virtual RGB data of each part of the printed matter calculated by the virtual data calculating means, An ink supply amount adjusting device characterized in that the virtual ink film thickness when the ink becomes the smallest is estimated as the current ink film thickness in a range corresponding to the ink fountain key of the imaged print. In the ink supply amount adjusting device according to claim 1 or 2,
Reference ink film thickness storage means for storing the reference ink film thickness;
Virtual ink film thickness correction value storage means for storing a virtual ink film thickness correction value,
The virtual data calculation means includes
The virtual ink film thickness is obtained from the reference ink film thickness stored in the reference ink film thickness storage means and the virtual ink film thickness correction value stored in the virtual ink film thickness correction value storage means. An ink supply amount adjusting apparatus, wherein virtual RGB data of each part of the printed matter is calculated using the obtained virtual ink film thickness. In the ink supply amount adjusting device according to any one of claims 1 to 3,
The ink fountain key adjusting means is
Obtain the ink film thickness ratio with respect to the standard ink film thickness of the current ink film thickness in the range corresponding to the ink fountain key of the imaged print estimated by the ink film thickness estimation means, and correct the reciprocal of this ink film thickness ratio An ink supply amount adjusting device characterized by adjusting an opening amount of the ink fountain key. In the ink supply amount adjusting device according to any one of claims 1 to 4,
The virtual data calculation means includes
Using the formula that defines the relationship between the pattern area ratio of each color of the printed material, the ink film thickness of each color, and the RGB value, the image data of each color of each part of the printed material stored in the image data storage means and the virtual of each color An ink supply amount adjusting device characterized in that virtual RGB data of each part of the printed matter is calculated from the ink film thickness. In the ink supply amount adjustment method for a printing press, which includes a plurality of ink fountain keys and adjusts the ink supply amount supplied to the printed matter by adjusting the opening degree of these ink fountain keys.
A pattern data storage step for storing pattern data of each part of the printed matter;
An imaging step of capturing an image of a printed matter printed by the printing machine;
An imaging data storage step for storing RGB data of each part of the printed material imaged in the imaging step;
A virtual data calculation step of calculating virtual RGB data of each part of the printed matter from the pattern data and virtual ink film thickness of each part of the printed matter stored by the pattern data storing step;
A range corresponding to the ink fountain key of the printed material imaged from the RGB data of each part of the imaged printed material stored in the imaging data storage step and the virtual RGB data of each part of the printed material calculated by the virtual data calculating means. An ink film thickness estimation step for estimating the current ink film thickness;
An ink fountain key adjusting step for adjusting an opening amount of the ink fountain key based on a current ink film thickness in a range corresponding to the ink fountain key of the imaged print estimated by the ink film thickness estimating step. Supply amount adjustment method. In the ink supply amount adjusting method according to claim 6,
The ink film thickness estimation step includes:
Find the sum of squares of the residual between the RGB data of each part of the imaged printed matter in the range corresponding to the ink fountain key and the virtual RGB data of each part of the printed matter calculated by the virtual data calculating step, and the square sum of this residual A method for adjusting an ink supply amount, comprising: estimating a virtual ink film thickness when the ink becomes the smallest as a current ink film thickness in a range corresponding to an ink fountain key of an imaged print. In the ink supply amount adjusting method according to claim 6 or 7,
A reference ink film thickness storing step for storing the reference ink film thickness;
A virtual ink film thickness correction value storing step for storing a virtual ink film thickness correction value,
The virtual data calculation step includes:
The virtual ink film thickness is calculated from the reference ink film thickness stored in the reference ink film thickness storage step and the virtual ink film thickness correction value stored in the virtual ink film thickness correction value storage step. An ink supply amount adjusting method, wherein virtual RGB data of each part of the printed matter is calculated using a virtual ink film thickness. In the ink supply amount adjusting method according to any one of claims 6 to 8,
The ink fountain key adjustment step includes:
Obtain the ink film thickness ratio of the current ink film thickness to the reference ink film thickness in the range corresponding to the ink fountain key of the imaged print estimated by the ink film thickness estimation step, and correct the reciprocal of this ink film thickness ratio. The method for adjusting the ink supply amount is characterized by adjusting an opening amount of the ink fountain key. In the ink supply amount adjustment method according to any one of claims 6 to 9,
The virtual data calculation step includes:
Using the formula that defines the relationship between the pattern area ratio of each color of the printed material, the ink film thickness of each color, and the RGB value, the image data of each color of each part of the printed material stored by the pattern data storage means and the virtual of each color A method for adjusting an ink supply amount, wherein virtual RGB data of each part of the printed matter is calculated from an ink film thickness.

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