JPS6244362A - Master slave tracer controller - Google Patents

Abstract

PURPOSE:To form the number of signal lines into one piece and make the wiring simplifiable, by converting the travel of a first cutter per unit time into series data, and making it so as to be transmitted to an error register at the side of a second cutter. CONSTITUTION:A microprocessor 1 at the side of a first cutter 12 finds the travel of a machine movable part at each specified time (t), adding this value to a parallel converter 5, and a work W1 is machined. Next, when a processor 21 at the side of a second cutter 29 reads the travel -Lx, -Ly and -Lz in X-, Y- and Z-axis directions of the machine movable part to be added via a series-parallel converter 22, these values are added to each of error registers 24X-24Z, whereby such a voltage as corresponding to a difference between the travel -Lx, -Ly and -Lz and the pulse number of a feedback pulse out of position detectors 27X-27Z is outputted from these registers 24X-24Z, and the cutter 29 and a work W2 are relatively moved, thus this work W2 is machined in the same form as a model M. Thus, signal lines connection both these first and second cutters 12 and 29 can be formed into one piece, making the wiring simplifiable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a master-slave profiling control device that can process a plurality of workpieces into the same shape using one profiling control device.

[Conventional technology]

FIG. 4 is a block diagram showing an example of a conventional master-slave tracing control device, in which 41 is a tracer head, 42
is a stylus, 43 is a first cutter head, and 44 is a first cutter head.
cutter, 45 is a tracer head 41 and cutter head 4
3, 46 is a contour calculation circuit, 47X to 47Z are X to Z axis drive circuits,
48X~48Z are X-Z axis motors, 49X
~49Z are X-Z axis position detectors, 50X~5
0Z are X-Z axis error registers, 51X to 51, respectively.
52X to 52Z are X-Z axis motors, 53X to 53Z are X-Z axis position detectors, 54 is a second cutter head, 5
5 is a second cutter, M is a model, and Wl and W2 are workpieces.

The tracer head 41 generates a displacement signal ε8. corresponding to the amount of displacement of the stylus 42 moving in contact with the model M in the x, y, and z axis directions. ε7. The profiling calculation circuit 46 outputs a displacement signal ε8. X, Y based on εA, εWork.

Speed command signal V x, V indicating the movement speed in the Z-axis direction
y.

Vz is created and added to the drive circuits 47X to 47Z. The motors 48X to 48Z are driven by the output signals of the drive circuits 47X to 47Z, and the tracer head 41 and the model M are moved relative to each other.

Along with this, the tracer head 4 is also
The cutter head 43 connected to the model M also moves together, and the workpiece W1 is machined into the same shape as the model M. The above operation is already well known as profile control.

In addition, position detectors 49X to 49Z are connected to motors 48X to 48
A position detection pulse is output every time Z rotates a predetermined angle.

Here, when the motors 48X to 48Z rotate by a predetermined angle,
Along with this, the mechanical movable part also moves by a predetermined amount in the X, Y, and Z axis directions, so the position detectors 49X to 49Z detect that the cutter 44 and the workpiece W1 are in the x and y directions.

A position detection pulse is output every time there is a predetermined relative movement in the Z-axis direction. Also, error register 50X~5
02 is the four position detectors X to 49Z on the first cutter 44 side
The drive circuit 5 generates a voltage corresponding to the difference in the number of pulses between the position detection pulse applied from the position detection pulse and the feed hack pulse applied from the position detectors 53X to 53Z of the second cutter 55.
Add to 1X~51Z. And the drive circuit 51
The motors 52X to 52Z are driven by the output signal of 51Z, the cutter 55 and the workpiece W2 are moved relative to each other, and the workpiece W2 is processed into the same shape as the model M.

[Problem that the invention seeks to solve]

However, in the conventional device described above, the detection pulses of the position detectors 49X to 49Z on the first cutter 44 side are respectively added to the error registers 50X to 50Z on the second cutter 55 side. There is a problem that the number of signal lines between the cutter 44 side and the second cutter 55 side increases, making the wiring complicated. In addition, in FIG. 4, the position detector 49
X~49Z and error registers 50X~50Z are each connected by one signal line, but in reality, a signal line for transmitting a signal indicating the rotational direction of the motors 48X~48Z is also required, so wiring is required. becomes even more complex.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention moves the first laser head and the model relatively based on a displacement signal from a tracer head that tracks the model surface, and also moves a first cutter to the tracer head that tracks the model surface. In a profiling control device that moves integrally with the head, (1) a movement amount detection means for detecting the amount of movement of the first cutter per unit time; (2) the first cutter detected by the movement amount detection means; sending means for converting the amount of movement per unit time of the first cutter into serial data and sending it out; (2) an error register in which the amount of movement per unit time of the first cutter from the sending means is set; A moving means for moving the second cutter based on the output signal of the error register is provided.

[For production]

Since the amount of movement of the first cutter per unit time is converted into serial data and transmitted to the error register of the second cassock, the number of signal lines can be reduced to one. .

〔Example〕

FIG. 1 is a block diagram of an embodiment of the present invention, in which 1 is a microprocessor, 2 is a memory, 3 is a tracing arithmetic circuit,
4X to 4Z are error registers for the X to Z axes, 5 is a parallel-serial converter, 6X to 6Z are drive circuits for the X to Z axes, 7X to 7Z are motors for the X to Z axes, 8X to 8
Z is a position detector for the X to Z axes, 9 is a tracer head, 1o is a stylus, 11 is a first cutter head, 1
2 is a first cutter, 13 is an arm, 21 is a microprocessor, 22 is a serial/parallel converter, 23 is a memory, 24
X~24 Z is the error register of X-Z axis, 25
χ~25Z is the drive circuit for the X~Z axis, 26X~
26Z is the X-Z axis motor, 27X~27Z
28 is a second cutter head, and 129 is a second cutter. Note that the profiling calculation circuit 3 receives the displacement signal ε8. from the tracer head 9 as in the conventional example described above. ε7. Based on ε2, speed command signals Vx, Vy, and Vz in the x-, y-, and z-axis directions are created and output.

, FIG. 2 and FIG. 3 are flowcharts showing the processing contents of the microprocessor 1 and the microprocessor 21, respectively.
The operation of the diagram will be explained.

After the microprocessor 1 on the first cutter 12 side instructs the start of profile machining (step SL), when it detects that a predetermined time has elapsed (step S2), it changes the contents Lx of the error registers 4X, 4Y, and 4Z.

Ly and Lz are read (step S3). Here, the error registers 4X to 4Z hold the difference between the number of detection pulses from the position detectors 8X to 8Z and the numerical value added from the microprocessor 1.
Since Z outputs a position detection pulse every time a mechanical movable part such as the cutter 12 moves a predetermined amount in the X, Y, and Z axis directions, the contents Lx, Ly of error registers 4X to 4Z
, Lz respectively indicate the amount of movement of the mechanical movable part per the predetermined time (however, the moving direction is opposite).

Next, the microprocessor 1 controls the x, y,
Numerical values -Lx, -Ly, and -Lz indicating the amount of movement in the z-axis direction are added to the child terminals of error registers 4X to 4Z, respectively (step S4). This allows the error register 4X
The contents of ~4Z are all zero. Next, the microprocessor 1 sequentially applies numerical values -Lx, -Ly, -Lz indicating the amount of movement of the mechanical movable part in the x, y, and z axis directions to the parallel-to-serial converter 5 (step S5), and then the profiling process ends. It is determined whether or not it has been done (step S6). If the judgment result in step S6 is NO, the microprocessor 1 returns to the processing in step S2, and if the judgment result is YES, after applying the processing end signal to the parallel-to-serial converter 5 (step S7), the microprocessor 1 returns to the processing in step S2. Finish the process.

That is, 1. The microprocessor 1 on the first cutter 12 side calculates the amount of movement of the mechanical movable part at predetermined time intervals, and adds the amount of movement to the parallel-to-serial converter 5 until the machining is completed. It is something that is done repeatedly.

The microprocessor 21 on the second cutter 29 side also controls the x
, -Ly for the amount of movement in the y and z axis directions.

-Lz is read (step 5ll), -Lx, -L
y and -Lz are added to the error registers 24X to 24Z, respectively (step 512). As a result, -Lx, -Ly, - from the error registers 24X to 24Z
A voltage corresponding to the difference between Lz and the number of feedback pulses from the position detectors 27X to 27Z is output,
The pick 29 and the workpiece W2 move relatively, and the workpiece W
2 is processed into the same shape as model M.

Further, when the processing in step 312 is completed, the microprocessor 21 determines whether the contouring process has been completed, that is, whether or not a process completion signal has been sent from the microprocessor 1 (step 513).

If the determination result in step S13 is YES, the microprocessor 21 ends the process, and if the determination result is NO, it is determined whether the predetermined time t has elapsed (step 514). When determining that the predetermined time has elapsed, the microprocessor executes step Sll.
The process returns to the previous step.

That is, the microprocessor z1 adds -Lx, -Ly, -Lz sent from the first cutter 12 side to the error registers 24X to 24Z at predetermined time intervals.
This process is repeated until the profiling process is completed.

In this way, according to this embodiment, the number of signal lines connecting the first cutter 12 side and the second cutter 29 side can be reduced to one, so that the wiring can be simplified. becomes.

Although not explained in the above-mentioned embodiment, when sending the movement amount per unit time from the microprocessor 1 to the microprocessor 21, the movement amount that has undergone lost motion correction is sent. In addition, when the direction of movement changes, the amount of lost motion preset by the microprocessor 21 is added to or subtracted from the amount of movement from the microprocessor 1, thereby eliminating the influence of lost motion and increasing machining accuracy. It becomes possible to do so.

〔Effect of the invention〕

As explained above, the present invention provides for relatively moving the tracer head and the model based on a displacement signal from the tracer head that tracks the model surface, and
In a profiling control device that moves a first cutter integrally with the tracer head, a movement amount detection means (in the embodiment, an error register 4X) detects the movement amount of the first cutter per unit time. ~4Z is read by the microprocessor 1 at predetermined time intervals), and the movement amount of the first cutter per unit time detected by the movement amount detection means is converted into serial data. A sending unit such as a parallel-serial converter 5 for sending out data, an error register in which the amount of movement of the first cutter per unit time from the sending unit is set, and a second cutter based on the output signal of the error register. Moving means for moving the cutter (in the embodiment, motors 26X to 26Z, second position detectors 27X to 27Z)
etc.), the first cutter side and the second cutter side can be connected with a single signal line, which simplifies the wiring compared to the conventional example. There are advantages to being able to do so.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flowchart showing the processing contents of the microprocessor 1, FIG. 3 is a flowchart showing the processing contents of the microprocessor 21, and FIG. 4 is a block diagram of the conventional example. It is a line diagram. 50X~50Z is an error register, 5 is a parallel-serial converter, 6X~6Z, 25X~25Z, 47X~47Z is a drive circuit, 7X~72.26X~26Z, 48X~48Z is a motor, 8X~82.27X~ 27Z, 49X~49Z
is a position detector, 9.41 is a tracer head, 10.42
is the stylus, 11.43 is the first cutter head, 12
．． 44 is the first cutter, 3.45 is the arm, 22 is the series-parallel converter, 28.54 is the second cutter head, 29
．． 55 is a second cutter. Patent applicant: Fanasoku Co., Ltd. Representative Patent Attorney Gobe Tamamushi (2 others) Flowchart 2 showing the processing contents of the microprocessor 1

Claims (1)

[Scope of Claims] The tracer head and the model are moved relative to each other based on a displacement signal from the tracer head that tracks the model surface, and the first cutter is moved integrally with the tracer head. The control device includes: a movement amount detection means for detecting the movement amount of the first cutter per unit time; and a movement amount detection means that detects the movement amount of the first cutter per unit time in series. a sending means for converting data into data and sending it out; an error register in which the amount of movement of the first cutter per unit time from the sending means is set; and a second cutter based on an output signal of the error register. A master-slave tracing control device comprising a moving means for moving the master-slave tracing control device.