JPS62140750A - Copy control device - Google Patents

Abstract

PURPOSE:To promote a machining shape of the first model to agree with the machining shape of the second model, by relatively moving the second cutter and a work through an addition signal summing up an output signal of an error voltage generating means, integration output signal of said output signal and a speed signal from a copying arithmetic circuit. CONSTITUTION:Integrators 21X, 21Z integrate output signals of amplifiers 20X, 20Z to be added to adders 22X, 22Z, and the adders 22X, 22Z sum up output signals of the integrators 21X, 21Z and the amplifiers 20X, 20Z to be added to adders 14X, 14Z. And in the adders 14X, 14Z, speed signals VX, VZ from an arithmetic circuit 7 and output signals of the adders 22X, 22Z are summed up and added to driver circuits 15X, 15Z, here their output signals drive motors 16X, 16Z. In this way, a position of the second cutter 11 can be equalized to the position of the first cutter with no steady error being generated between the positions of the first cutter 4 and the second cutter 11 even when counters 18X, 18Z count a small value.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the first aspect. a second cutter; The present invention relates to an improvement of a profiling control device that processes a second workpiece into the same shape as a model.

[Conventional technology]

FIG. 2 is a block diagram showing an example of a conventional device of this kind, in which 1 is a tracer head, 2 is a stylus, 3 is a model, 4 is a first cutter, 5 is a first workpiece, 6 is a table, 7 is a contour calculation circuit, 8X and 8Z are drive circuits for the motors 9X and 9Z in the X and Z axis directions, IOX, 102 is a position detector that generates a position detection pulse every time the motors 9X and 9Z rotate by a predetermined angle, and 11 is a position detector. 2nd cutter, 12 is the second workpiece, 13 is the table, 14X, 142 is the adder, 1
5X and 15Z are X.

Z-axis motor 16X, 16Z drive circuit, 17X.

172 is a position detector that outputs a position detection pulse every time the motor 16X and 162 move by a predetermined angle; 18X;
Z is a counter, 19X, 19Z is a voltage generator, 20X.

20Z is an amplifier.

The tracer head 1 generates a displacement signal ε corresponding to the amount of displacement in the X, Y, and Z axis directions of the squirt 2 that tracks the surface of the model 3.
8. ε1. It outputs the displacement signal Ex+
εA and εE are added to the tracing calculation circuit 7. The tracing calculation circuit 7 receives a displacement signal ε. , ε7. Tracing plane based on ε-work (assuming that the X-Z plane is the tracing plane in this case)
Axial velocity signals Vx and Vz are generated and applied to drive circuits 8X and 8Z and adders 14X and 14Z. Then, the motor 9X is driven by the output signals of the drive circuits 8X and 8Z.
, 9Z are driven, and the first workpiece 5 is processed into the same shape as the model 3 by the first cutter 4.

Further, Vz is added to the speed signal ■ applied to the adders 14X and 14Z with the output signals of the amplifiers 20X and 20Z, and is applied to the drive circuits 15X and 15Z.
The motors 16X and 16Z are driven by the output signal of the motor 15Z, and the second workpiece 12 is processed by the second cutter 11. Here, the speed signals Vx and Vz output from the profiling calculation circuit 7 are not directly applied to the drive circuits 15X and +52,
The reason why the signal obtained by adding the speed signals Vx, Vz and the output signals of the amplifiers 20X, 202 is added to the drive circuits 15X, 15Z is as follows. That is, 1st. second cutter 4,1
1 load, motor 9X.

If the characteristics etc. of 9Z, 16X, 16Z are all the same, even if the speed signals Vx, Vz are applied directly to the drive circuits 15X, 152, the 1st. Although the second workpiece 5.12 can be machined into the same shape, the loads etc. will not be the same in actual machining, so it is possible to directly apply the speed signals Vx and Vz to the drive circuits 15X and 152. 1st. Second
It is not possible to machine the works 5 and 12 into the same shape.

Therefore, the conventional device shown in FIG.
, 10Z, each time a position detection pulse is applied, the count value is +1, and each time a position detection pulse is applied from the position detectors 17X, 17Z, the count value is decreased by 1, and the counters 18X, 18Z. a voltage generator 19X that generates a voltage corresponding to the count value of
19Z and voltage generator 19X.

By providing adders 14X, 142 that add the output voltage of the adder 19Z and the speed signals Vx, Vz, and applying the outputs of the adders 14X, 14Z to the drive circuits 15X, 15Z, the first. Even if the load of the second cutter 4.11 is different, the first cutter 4.11. The second workpiece 5°12 can be machined into the same shape.

That is, the motor 9X is transmitted from the position detectors 10X and 10Z.

9Z rotates a predetermined angle and the cutter 4 moves a predetermined amount, a position detection pulse is output, and the position detectors 17X and 17Z
Since the motors 16X and 162 rotate by a predetermined angle and a position detection pulse is output every time the cutter 11 moves by a predetermined amount, the counter 18X.

The count value of 182 is the first. This shows the difference in position between the second cutters 4 and 11. Therefore, counter 18X, 1
The voltage corresponding to the count value of 8Z is added to adders 14X, 14
In addition to Z, the outputs of the adders 14X and 14Z are sent to the drive circuit 15.
By adding it to

[Problem that the invention seeks to solve]

However, the above-mentioned conventional example has the following problems. That is, in the conventional example described above, the correction voltages corresponding to the count values of the counters 14X and 18Z are applied to the adders 14X and 142.
Since the position of the second cutter 11 is corrected by adding the voltage to the first cutter 11, if the count value of the counter 18X, +87 is small and the correction voltage is small, There is a problem that a steady error occurs in the position of the second cutter 4.11, and when the gain of the amplifiers 20X and 202 is increased to solve this problem, there is a problem that hunting occurs.

The present invention solves the above-mentioned problems, and the first
．． The object of the present invention is to precisely match the machining shapes of the first and second workpieces to be machined by the second cutter.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has the following features: (1) A tracing calculation for creating a velocity signal for relatively moving the model and the tracer head based on the displacement signal from the tracer head that tracks the model surface; a circuit; (1) a first moving means for relatively moving the first cutter and the first workpiece based on the speed signal from the profiling calculation circuit; (2) the second cutter and the second workpiece; a second moving means for relatively moving; (1) a first position detector that outputs a position detection pulse every time the first cutter moves a predetermined amount; and (2) the second cutter moves a predetermined amount. a second position detecting means that outputs a position detecting pulse every time; and (1) the number of device detecting pulses output from the first position detecting means and the number of device detecting pulses output from the second position detecting means. an error signal generating means that outputs a signal with a level corresponding to the difference between the pulse number and the pulse number; (1) an integrator that integrates the output signal of the error signal generating means; and (2) an integrator that integrates the output signal of the integrator and the error signal generating means. Adding means for adding the output signal and the speed signal from the profiling calculation circuit is provided, and the second moving means is configured to move the second cutter and the second workpiece based on the output signal of the adding means. It is output so that it can be moved relatively.

〔Example〕

FIG. 1 is a block diagram showing the main parts of an embodiment of the present invention, 2iX and 212 are integrators, 22X and 22Z are adders, and the same symbols as in FIG. 2 represent the same parts. There is.

Integrators 21X and 21Z integrate the output signals of amplifiers 20X and 20Z and add them to adders 22X and 22Z.
X, 22Z is an adder 14X which adds the output signals of the integrators 21X, 212 and the output signals of the amplifiers 20X, 202.

This is in addition to 142. And an adder 14X.

14Z, the speed signal Vx from the profiling calculation circuit 7
, Vz and the output signals of the adders 22X, 22Z are added and applied to the drive circuits 15X, 15Z.
The motors 16X and 162 are driven by the output signal of the motor 15Z.

In this way, in this embodiment, the amplifier 20X has a level corresponding to the count values of the counters 18X and 182.

The output signals of 202 are integrated using integrators 21X and 212, and the output signals of integrators 21X and 21Z are combined with the amplifier 20X.

202 and the speed signal V from the tracing calculation circuit 7
A signal obtained by adding up X and Vz is sent to the drive circuit 15x.

Since it is added to 152, the counter +8X, 18
Even when the count value of Z is small, no steady error occurs between the position of the first cutter 4 and the position of the second cutter 11. That is, since the output signals of the integrators 21X and 212 increase with time even when the count values of the counters 18X and 18Z are small, the position of the second cutter 11 is The position of the cutter can be the same as that of the previous cutter.

〔Effect of the invention〕

As explained above, the present invention provides a counter 18X.

182, an integrator is provided to integrate the output signal of the error electron generation means consisting of the voltage generators 19X, 192, etc., and the output signal of the integrator is added to the speed signal from the tracing calculation circuit and the output signal of the error voltage generation means. The second cutter and the second workpiece are moved relative to each other by the signal generated by the first cutter and the second workpiece. There is an advantage that the machined shape of the second model can be matched with high accuracy.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional example. 1 is the tracer head, 2 is the stylus, 3 is the model, 4
．． 11 is the first. 2nd cutter, 5.12 the first and second workpieces, 6.13 table, 7 contour calculation circuit, 8
X, 8Z, 15X, 15Z are drive circuits, 9X, 9Z, 1
6X, 16Z are motors, IOX, 10Z. 17X, 172 are position detectors, 14X, 14Z, 22X
, 22Z is an adder, 18X, 18Z is a counter, 19X
, 19Z is a voltage generator, 20X, 20Z is an amplifier, 21
X and 21Z are integrators. Patent Applicant Fanasoku Co., Ltd. Representative Patent Attorney Gobe Tamamushi (2 others) Block diagram of essential parts of an embodiment of the present invention Fig. 1

Claims (1)

[Scope of Claims] A tracing calculation circuit that creates a velocity signal for relatively moving the model and the tracer head based on a displacement signal from a tracer head that tracks a model surface; a first moving means for relatively moving the first cutter and the first workpiece based on a speed signal; and a second moving means for relatively moving the second cutter and the second workpiece. a first position detector that outputs a position detection pulse every time the first cutter moves a predetermined amount; and a second position detector that outputs a position detection pulse every time the second cutter moves a predetermined amount. A detection means outputs a signal of a level corresponding to the difference between the number of position detection pulses output from the first position detection means and the number of position detection pulses output from the second position detection means. an integrator that integrates the output signal of the error signal generation means; an integrator that adds the output signal of the integrator, the output signal of the error signal generation means, and the speed signal from the profiling calculation circuit; adding means, wherein the second moving means relatively moves the second cutter and the second workpiece based on the output signal of the adding means.