JPH0314105A - Re-forward motion method for numerical controller - Google Patents

Abstract

PURPOSE:To always execute the re-forward motion from the backward motion end point irrespective of a cursor movement, etc., after the backward motion is ended by storing in advance a position of an NC program at the time when the backward motion is ended, setting automatically a cursor to this position at the time of re-forward motion, and starting the operation. CONSTITUTION:When a reverse switch 17d is turned on in the course of a forward motion, a pulse distribution is executed based on stored moving data and modal data and a backward motion is executed. Also, simultaneously, a program pointer for showing an executing position on an NC program is stored in a RAM 13, while updating it successively. When a feed hold switch 17b is turned off, and a cycle start button 17a is pushed, a processor 11 reads out the program pointer stored immediately before a stop of the backward motion, and executes a re-forward motion in accordance with an edited program from a position at the time when the backward motion is ended by moving a cursor on a program display screen to this position. In such a way, even if the cursor is moved in an editing work after the backward motion, the re- forward motion can always be executed from the position at the time when the backward motion is ended.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for re-progressing a numerical control device (CNC),
In particular, a numerical control device (CNC) that can always perform forward movement again from the end point of backward movement regardless of the movement of the cursor after the end of reverse movement [Prior technology] A numerical control device (CNC) that can perform backward movement or forward movement again during automatic operation being developed.

For example, by operating the reverse switch, you can go back by following the processing path you have passed so far (reverse).
Furthermore, it is possible to retraverse (re-progress) the machining path that has been reversed.

Further, by stopping the operation mode after returning to a predetermined position and switching the operation mode of the numerical control device from the memory mode to the edit mode, it is possible to edit the NC program after the return position.

When the editing work is completed and operation is started by switching to the memory mode again, the program starts running again according to the edited NC program from the position indicated by the cursor on the program display screen.

[Problem to be solved by the invention]

However, when the operator moves the cursor to another position during editing, it is necessary to return the force sor to the position at the end of the backward movement, which is cumbersome. Furthermore, if this operation is neglected, the operation will start from a different position, which may result in damage to the workpiece or tool, which is dangerous.

The present invention has been made in view of these points, and it is an object of the present invention to provide a method for re-progressing a numerical control device that can always re-progress from the end point of the retrograde movement, regardless of the cursor movement after the completion of the retrograde movement. shall be.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a re-progress method for a numerical control device (CNC) in which the automatic operation is interrupted and the NC program is reversed, and then the re-progress is performed. The numerical control device is characterized in that predetermined data indicating the position of the controller is stored in a memory, the predetermined data is read out in response to a re-prograde command, and the re-prograde is started from the position at the end of the re-progress. An antegrade method is provided.

[Effect]

The position of the NC program at the end of the reverse run is memorized, and when the machine returns to the forward run, the cursor is automatically set at this position and the operation is started.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 is a schematic diagram of the hardware configuration of a numerical control device for implementing the present invention. Processor ↑1 is ROM1
The entire numerical control device is controlled according to the system program stored in 2. The ROM 12 is an EPROM or an EEPROM. A DRAM is used as the RAM 13, and stores movement data, modal data, program pointers, and various other data and input/output signals, which will be described later. A battery-backed CMO3 is used as the non-volatile memory 14, and the NC program 140
, other parameters, pitch error correction amount, etc. are stored.

The graphic control circuit 15 converts the digital signal into a display signal and supplies it to the display 16. The display 16 shows C.
An R, T or liquid crystal display device is used to display the NC program 140, the position of each axis, the status of input/output signals, etc. The operation panel 17 includes a cycle start button 17a that outputs an operation start signal, a feed hold button 17b that outputs a - time stop signal, a single block switch 17c that outputs a stop signal to stop at a block boundary, a reverse switch 17d, and others. There is a keyboard 17e, etc., which is used for operating the machine tool 18 or for manpower of various pigs. The above components are connected by a bus 19.

Note that components such as an axis control circuit, a servo amplifier, a spindle amplifier, and a PMC (programmable machine controller) are omitted in this figure.

Here, when the operator operates the keyboard 17e to set the memory mode and presses the cycle start button]7a, the processor 11 reads the NC data from the nonvolatile memory 14.
The program 1/10 is read out block by block, and while converting this into movement data, pulse distribution is performed and forward processing is performed, and this movement data and modal data necessary for preprocessing are stored in RAM+3. When the reverse switch 17d is turned on during forward movement, pulse distribution is performed based on the stored movement data and modal data, and the movement is made in reverse. At the same time, the program pointer indicating the execution position of the NC program 140 is sequentially updated while
I will remember it on the 13th.

When the reverse movement has been carried out to the target position, the operator presses the feed hold button 17b or single block switch 1.
Stop the reverse movement by operating 7c, and press keyboard 1.
By operating 7e, change the operation mode to edit mode and perform the necessary editing work. After completing this, change to memory mode and press the feed hold switch 17d.
turn off, cycle start button], press 7 a.

By this operation, a restart signal is input to the processor 11, and the processor 11 reads out the program pointer that was stored just before the stop of the reverse movement, moves the cursor on the program display screen to this position, and determines the position at the end of the reverse movement. Then, perform the re-travel according to the edited program.

FIG. 3 shows the program display screen of the display 16 when restarting operation. In the figure, an NC program 140 is displayed on the display screen 20, and for example, when editing, a cursor 21
Even if it has been moved to position 141b, it is automatically moved to position 141a when the reverse movement is stopped.

FIG. 1 is a flowchart of the processing of the processor 11 described above. In the figure, the number following S indicates the step number.

[S1] Determine whether or not reverse movement has been commanded. If it has been commanded, go to S9; if not, go to S2.

[S2] Determine whether to go forward again after going backwards or normally go forward. If going forward again, go to S3; if go forward, go to S4
I'm going to go.

[S3] Read the program pointer at the end of the backward movement.

[S4] Set the program pointer to the read program pointer position in the case of re-forwarding, or set the program pointer in the reverse order in the case of forward reading, move the cursor to that position, and read the data of the block.

[', S5] Determine whether execution of all blocks of the NC program has been completed. If the execution has been completed, the process ends; if not, the process advances to S6.

[S6] Convert the read data to movement data in execution block format.

[S7] The movement data, modal data, and program pointer are stored in the RAM 12.

[S8] Pulse distribution is performed based on the created movement data and modal data, and the process returns to S4.

[S9] Read out the movement data, modal data, and program pointer stored during forward movement.

[S10] Determine whether or not the stop signal was manually operated. If it was manually operated, the process ends; if it is not manually operated, Si4
I'm going to go.

[:511) Store the program pointer in a predetermined location in the RAM 12 where data for backward movement is stored.

[S12:] Pulse distribution is performed based on the read movement data and modal data, and the process returns to S9.

In this manner, the program pointer is sequentially updated and stored in the RAM 12 during the backward movement, and is read out during the forward movement again, thereby starting the operation from the position at the end of the backward movement.

〔Effect of the invention〕

As explained above, in the present invention, the position of the NC program at the end of the backward movement is memorized, and when the forward movement is resumed, the cursor is automatically set at this position and operation is started, so the cursor can be moved during editing work after the backward movement. Even if you do this, you can always go forward again from the position you left at the end of the backward movement, improving operability and safety.

[Brief explanation of drawings]

FIG. 1 is a flowchart of a re-progress method for a numerical control device according to an embodiment of the present invention, FIG. 2 is a block diagram showing a schematic hardware configuration of a numerical control device for implementing the present invention, and FIG. The figure is a diagram showing a program display screen in one embodiment of the present invention. 1 3 4 7 0 1 40 141 a 141 b Processor AM Nonvolatile memory Operation panel display screen Cursor Position at the end of NC program backward movement Position at the end of editing

Claims (1)

[Claims] (1) In a re-forwarding method for a numerical control device (CNC) in which automatic operation is interrupted and the NC program is reversed, the re-forwarding method is performed. 1. A method for re-progressing a numerical control device, comprising: storing the predetermined data in a memory, reading the predetermined data in response to a re-progress command, and starting the re-progress from the position at the end of the retrograde movement.