EP0607747B1 - Method for regulating the cloth line position and a weaving machine for realizing the method - Google Patents

Description

The present invention relates to a method for Regulation of the marginalization of goods with regard to Weaving shop position in a weaving machine and weaving machine for Execution of the procedure.

EP-A-0 117 479 describes a method with which the warp tension values per revolution of the Main shaft measured, the average of the measured values is integrated and stored so that the weaving machine in the same condition as before the business interruption can be started.

From CH-A-668 997 a method is known from which the warp tension before and / or during the Standstill is measured and the measured values are saved become. Taking the data into consideration the changing during the standstill Tension ratios the target data for the Determines the start setting of the loom, the Target position of the tissue stop edge by a sensor is monitored.

EP-A-0 208 366 discloses a method for Regulation of the edge of the goods, in which the Edge of goods position scanned by a sensor and the goods edge by means of a movable breast tree is adjusted. During operation, the Displacement of the goods edge and breast tree continuously sampled and the samples a controller forwarded, which the provision of the goods margin concerned. This is based on the assumption that the shift only from the chain and not from the fabric going out. This assumption is incorrect. Since both the Chain as well as the fabric have elastic property can be a misconduct with the warp or goods run interacting elements cannot be excluded.

The invention as characterized in the claims is, the task solves a procedure of the beginning to create the type mentioned, in which the by the Misconduct with the warp or goods run interacting elements Edge shift in relation to the Reverse reed position during operation is continuously regulated.

By including the spring model in the regulation the edge shift regardless of warp tension regulated.

To determine the actual value of the goods edge shift, the free length of the warp or goods run and / or the measure of warp and / or delivery of goods and / or the Position at least one with the warp or goods run interacting element depending on the Main shaft position measured. This allows in advantageously the operating behavior of the weaving machine be included.

It also proves advantageous that the target values for the measured systems from an average for K-shots is calculated, creating a direct relationship between actual and setpoint on the running weaving machine can be achieved.

In the following the invention with reference to the enclosed Drawings explained.

Fig. 1

eine schematisch dargestellte Webmaschine;

Fig. 2

ein Blockschema einer Steuereinrichtung;

Fig. 3

die Einzelheit A im grösseren Massstab;

Fig. 4

eine schematische Darstellung eines erfindungsgemässen Merkmals und

Show it:

Fig. 1

a schematically illustrated weaving machine;

Fig. 2

a block diagram of a control device;

Fig. 3

detail A on a larger scale;

Fig. 4

a schematic representation of a feature according to the invention and

As shown in Fig. 1, the weaving machine contains one Main shaft 1 with a signal generator 2 for the Angular position of the main shaft, a warp beam 3, the a drive device 4 with chain 5 for the Warp let off and a signal generator 6 for the Warp let position, a support tree 7, a Spanning boom 8 with a clamping device 9, which is movable is arranged to keep the warp thread tension constant hold, and with a signal generator 10 for the position of Spannbaumes, a reed 11, a breast tree 12, one Switch tree 13 with a drive device 14 and one Goods circuit 15 to withdraw the goods, a Pressure roller 16 and a goods tree 17 to the goods wind up. There is also a control device 18 provided with the signal generator 2 for the angle of rotation the main shaft 1, the signal generator 6 for the Warp let-off position and the signal generator 10 for the Spanning tree position on the one hand and with the Drive device 14 of the switching tree 13 on the other hand connected is.

An embodiment of the control device is shown in FIG. 2 shown. The control device contains one Data memory 19, a program memory 20 and one Processor 21, which is connected to one another via data lines on the one hand and with an adaptation circuit 22 on the other hand are in operative connection. The Adaptation circuit 22 is in turn with the Signal generators 2, 6 and 10 and with the goods circuit 14 connected.

3 is a schematic representation of the Area of the weaving machine in which the actual Weaving takes place.

In Fig. 3 the reed 11 is in the retracted position Position with a dashed line and in the Reverse position shown with a solid line. The compartment formed by the warp threads 24 goes on Goods edge 25 into the goods 26 over. The distance L between the goods edge 25 and that in the reverse position Web reel 11 located represents the target value, the with the inventive method at issue here after is regulated. During the operation of the weaving machine as well as when it stops Goods edge position, so that between the shifted Edge of goods 24 and the one in the reverse position Reed 11 there is a distance L ', which is the actual value represents the goods edge position. The length of the Edge shifting results from the relationship L-L '.

The following is an embodiment of the method described with reference to Figure 4.

When the loom is switched on, the Angular position of the main shaft measured. The rotation the main shaft 1 is monitored. After the main shaft 1 an angle of rotation of n ° e.g. 10 ° executed the length drained from the warp beam, the Position of the spanning tree 8 and on the goods tree wound length measured; being for every turn the main shaft the same number of measurements is provided. These measured values are actual values and are filed in the fi-fo memory 19. From a number of Shot entries including the last one Weft insertion becomes the average of the measured values determined, which is taken as target values. Through this The procedure will be advantageous Operating behavior of the loom to determine the Setpoints L1 and L2 taken into account. When weaving changes the length of the free chain and goods on the Warp side due to the unsteady behavior of warp let-off and spanning tree and on the goods side by the unsteady behavior of goods switching. The Length changes Δ L1 and Δ L2 are calculated using a Actual / setpoint comparison of the measured values determined. Since on Margin 22, i.e. at the chain transition - goods the force the deviation Δ L of the free remains the same Goods margin from the ratio of the e-modules of the chain and Goods and the chain and goods length calculated. On the The basis for this model is the correction value for the Length of the warp run repeatedly calculated. In the In the present embodiment, the correction value for the goods side calculated, this for the position the breast tree and / or the goods deduction is determined and is adjusted accordingly.

It is also possible to set the correction value for the chain side to calculate. In this case, the correction value for the warp let-off and / or the position of the tensioning boom calculated and then set accordingly.

In addition to the above options, you can also others in operative connection with the warp or goods run standing elements can be set accordingly.

The procedure described is particularly useful if the weaving machine is back in operation after a standstill is taken. By determining the setpoint at running weaving machine can due to the calculation model Setting can be made very precisely. Will the Standstill triggered by a weft break, see above can be the setpoint related to the weft removed can be corrected without additional equipment.

There is also the possibility of determining the Average value to take into account the change of bond.

Claims (9)

1. A method of regulation of the position of the fell of the cloth with

   respect to the position of the sley in a loom, in which the position of the fell of the cloth is controlled by alteration of the free length of the warp fabric, the position of the fell of the cloth being regulated continuously during operation on the basis of a comparison between actual and desired values of the shift of the fell of the cloth with respect to the position of reversal of the sley, characterized in that in the comparison between actual and desired values a spring model is included, by which the deviation of the fell of the cloth is calculated from the ratio of the moduli of elasticity of warp and cloth.
2. A method as in Claim 1, characterized in that

   the free length of run of warp to cloth and/or the measurement of the delivery of warp and/or cloth and/or the position of at least one element cooperating with the run of warp to cloth is measured in dependence upon the position of the main shaft for determining the actual state of the run of warp to cloth.
3. A method as in Claim 2, characterized in that

   the measured values are sensed optically or mechanically for determining the actual state of the run of warp to cloth.
4. A method as in one of the Claims 1 to 3, characterized in that

   the measured or sensed values are stored and the average values are calculated for an optional number of weft insertions, for determining the desired state of the run of warp to cloth.
5. A method as in Claim 1, characterized in that

   the shift of the fell of the cloth is cancelled by alteration of the length let off by the warp beam and/or the length wound up onto the cloth beam.
6. A method as in Claim 1, characterized in that

   the shift of the fell of the cloth is cancelled by alteration of the position of at least one element which cooperates with the run of warp to cloth and is chosen from the group comprising tension-beam, breastbeam or compensating roller.
7. A method as in one of the Claims 1 to 6, characterized in that

   upon the occurrence of a mispick the number of weft threads removed is included as a correction factor.
8. A method as in one of the Claims 1 to 7, characterized in that

   in addition the change of weave is taken into consideration in the determination of the average value.
9. A loom which exhibits a warp beam (3), a cloth beam (17), a further

   element (7, 8, 12, 13, 16) in operative connection with the run of warp or cloth respectively, a mechanism for displacing the element and the run of warp or cloth relatively to one another, and a control equipment (18), characterized in that the control equipment exhibits means of regulating the position of the fell of the cloth with respect to the position of the sley according to a method as in Claims 1-9.

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