JPS6063605A - Numerical controller with composite skipping function - Google Patents

Abstract

PURPOSE:To perform complicate skip processing by judging a condition which meets a skip signal, and deducing a block to be processed. CONSTITUTION:Skip signal selection commands are provided as many as conditions to be skipped so that a skip is made with skip signals sent out on various conditions and processing meeting each condition is performed. The skip conditions are judged by a skip condition judging means SCM from program commands read in by a program reading means PRM. Further, skip signals for various conditions which are inputted externally are supplied through a skip signal input means SIM and inputted to a skip judgement command means SOM. This command means SOM also inputs the judgement result from the judging means SCM and judges the time of skipping and a block to be processed right after the skipping to send commands.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application and Prior Art The present invention relates to a numerical control device having a skip function.

At the same time as executing the movement commanded by the command program,
A numerical control device is known that has a function of forcibly stopping the movement and moving to the next block even before reaching the end point in response to a skip signal input from the outside during the movement. .

For example, when grinding with a grinding machine, etc., the amount of movement of the shaft that sends the grindstone toward the workpiece is not determined in advance, but the current value of the load motor is measured while monitoring the grinding conditions, etc., and a specific value is reached. Skip processing is performed in which the movement is terminated by a skip signal that is issued when a certain condition is reached, such as when a certain limit switch is turned on or when a specific limit switch is turned on, and the movement is terminated and the process proceeds to the next block. When using such a skip function to change the processing operation, such as reducing the feed rate over several stages or returning it slightly, according to various conditions, conventional numerical control devices cannot use the following commands, for example. Process the program.

G31X100. Flooo: ・・・・・・(1)G
31xlOO, F500: ・・・・・・(2) G31
x1oo, F200: ・・・・・・(3)21000
, Flo: ...... (4) (G31 is a code representing the skip function.) The command for one block shown in the first equation is to drive the X-axis to 1°O at a speed of 1000. , However, when a skip signal is input, it means to stop processing and skip to the next block. Therefore, processing is performed at a speed of 1000 according to the command shown in the first equation, but when a specific condition 1 is met,
When the skip signal is issued, the processing of the block represented by the first equation is completed, and the processing of the next block, the second equation, is performed.

That is, the speed is reduced to 500 and processing is performed. Next, when specific condition 2 is achieved, a skip signal is issued again, the speed is reduced to 200, processing is performed, and finally the specified When condition 3 is achieved, the skip signal is issued again, and the process of sending the workpiece along the workpiece is performed as shown in the fourth equation.

The above is the processing by the skip function in the conventional numerical control device. However, in this method, for example, if condition 3 is achieved from the beginning, Even though the process of sending 1000 in the 7-axis direction should be performed, only the process shown in the first equation above is skipped by the skip signal issued by the achievement of the above condition 3, and the next block, the above second block, is skipped. It has the disadvantage that the expression processing continues indefinitely.

OBJECTS OF THE INVENTION The present invention improves the above-mentioned prior art and provides a numerical control device having a composite skip function that can skip in response to skip signals issued depending on various conditions and perform processing that meets each condition. The purpose is

Structure of the Invention Fig. 1 is a block diagram showing the characteristic parts of the present invention.The present invention executes movement according to instructions from a program, forcibly stops movement by a skip signal inputted from the outside, and then moves to the next step. In a numerical control device having a skip function that moves to a block, a skip condition determining means SCM determines a skip condition from a program command read from a program reading means PRM, and a skip signal generated by various conditions issued from the outside is input. The skip signal input means SrM includes a skip determination command means SOM for determining the timing to skip and the block to be skipped and next processed based on the outputs from the skip condition determination means SCM and the skip signal input means SIM. This is a numerical control device having a composite skip function.

Embodiment FIG. 2 is a block diagram of an embodiment of the numerical control device of the present invention, in which 1 is a central processing unit (CPU), and 2 is a ROM in which a program for controlling the entire vl value control device is stored.
, 3 is a RAM for arithmetic processing, etc., and 4 is a non-volatile memory 11, which is a memory for storing command programs for machining. Reference numeral 5 is an output circuit for connecting to a glue motor of a machine tool, etc., and 7 is an NC tape on which a command program is written, which is read by a tape reader 6 and stored in a non-volatile memory 4. ing. Note that the program may be read and processed directly from the NC tape by a tape reader without providing the nonvolatile memory 4.

8 is an input circuit into which a plurality of skip signals S1 to Sn are input. Further, 9 is a bus.

In the above-described configuration, in order to perform skip processing, skip signal selection commands P are issued as many times as there are conditions to be skipped.
1 to Pn, the first skip signal selection command P1 is used to command blocks to be skipped for all skip signals, and the second skip signal selection command P2 is used to command blocks to be skipped for all skip signals. Used to specify blocks to be skipped.

Similarly, the K-th skip signal selection command Pk is (
The n-th skip signal selection command Pn is used to command a block to skip only to one skip signal, except for K-1) skip signals, and the nth skip signal selection command Pn is used to command a block to skip only to one skip signal. use For example, there are three conditions, and a skip signal is issued for each condition.
The command program for skipping according to conditions is as follows.

G31 P'+ X 100. F1000: ・
...(5) G31 F2 X 100. F500:
--(6) G31 Pa Xl 00. F200:
......(7)71000, Flo: ...
(8) The example of the above program is the same as the example described earlier (a skip signal is issued under each of the three conditions, and the skip signal issued when the first condition is achieved is S+, and the second The skip signal issued when the condition is fulfilled is 32, and the skip signal issued when the third condition is met is denoted 83, and these signals are inputted from the input circuit 8, respectively.

Therefore, in order to execute a program including skip processing as shown in the above equations 5 to 8, the CPU 1 first sets the index n to "1" as shown in the processing flow of FIG.
Step 5101), the program stored on the NC tape or the program stored in the nonvolatile memory 4 is read from the nth (=1) block (step 102). Then, it is determined whether the command of the block is a skip command (G31 P+-G31 F3) (steps 103 to 105), and if it is a skip command, the process commanded by the block is executed (step 1).
06), when the processing of one block is completed, step 107)
, if the program is not finished (step 108), add "1" to the index n and read the block of values of the index. That is, the next block will be read (step 10
2). Below, similar processing is performed, but the fifth
If there is a skip command as shown in formulas to formula 7, for example, when the Sugitsubu command of formula 5 above is read, the CPU
1 is the skip signal selection command P1 of G31 P+.
Step 103)
, next, the skip signal S1 of the first condition is sent from the input circuit 8.
Alternatively, it is determined whether even one of the skip signals @S2 or S3 under the second condition has been input (step 110), and if not, the processing in the block, That is, the processing is continued at a speed of 1000 indicated by the fifth equation (step 10).
6). However, the conditions for issuing a skip signal, such as the motor current reaching a predetermined value or the limit switch being turned on, are the first and second conditions. At least one of the third conditions is met, and the first condition is met. Second. Skip signal of the third condition S1゜Even one of G2 and G3 input circuit 8
, the CPU 1 detects it and executes step 1.
10), stop the current process (step 113), add "1" to the index n (step 114), and read the next block (step 102). As shown in equation 6, the next block is a skip command of the skip selection command P2, which is G31 F2, so CrJJ 1 is sent from the input circuit 8 to the second . Step 104. It is determined whether the skip signals 82, 83 of the third condition are input. ．． 11
1), if it is not input, process the block, that is, process J: sea urchin speed 500 as shown in equation 6 (
Step 106). However, when the second or third condition has already been met and the skip signals S2 and G3 of the second or third condition have been input (when the first skip signal was 82 or G3) ), or when the condition is satisfied during the processing of the block and the skip signal 32, G3 of the second or third condition is input, step 111) stops the processing of the block (step 113), and sets the index to " Increase by 1” (step 114)
, the next block determines whether or not the skip signal S3 of G31 F3 is input, as shown in equation 7 (steps 102 to 105 and 112). If the skip signal of the third condition is not input, processing of the block;
That is, processing is performed at a speed of 200 as shown by the seventh equation (step 106). However, when the skip signal M S s of the third condition has already been input, or the processing in the block progresses, the third condition is satisfied, and the skip signal S3 of the third condition is input. and (step 112)
, stops processing the block, increments the index n by "1" (steps 113 and 114), and reads the next block (step 102). That is, the command shown by the eighth equation is read, and the robot moves to the Z-axis position 1000 at a speed of 10.

As stated above. J: Sea urchin, first condition, second condition, third condition
If the following conditions occur in order, the above 1st, 2nd, and so on. Third
The skip signals Sz and S2 under the conditions of.

S3 is input in sequence, and the processing is performed in sequence from the process shown by the fifth equation to the sixth, seventh, and eighth equations. Further, when the third condition is satisfied during the block processing shown in equation 5 and the skip signal S3 of the third condition is input, step 103-→110→113→1 shown in FIG.
14 → 102 → 104 → 111 → 113 → 114 → 10
2 → 105 → 112 → 113 → 114 → 102 → 106
The processing shown in equations 5, 6, and 7 is skipped, and the processing block shown in equation 8 is executed. Similarly, when the skip signal S2 of the second condition is input during the processing of the block shown in the fifth equation, the processing of the block shown in the fifth and sixth equations is skipped, and the block shown in the seventh equation is skipped. Block processing will now be performed.

In addition, in the above embodiment, an example was shown in which a skip signal is issued depending on three conditions, but if various processes are to be changed depending on many conditions, skip signal selection commands should be prepared as many times as there are for each condition. , various processes may be performed.

Effects of the Invention The present invention can determine the conditions that match the skip signal based on the skip signals that occur under various conditions, and determine the necessary block for the next process. If you reduce the speed etc. by several steps,
This enables a wide range of complex skip processing, such as when you want to re-feed after moving back a little.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the characteristic parts of the present invention, FIG. 2 is a block diagram of an embodiment of the invention, and FIG. 3 is a processing flow of an embodiment of the invention. 1... Medium heat processing unit (CPU), 2... ROM (Read Only Memory), 3... RAM (Random Access Memory). Patent applicant: FANUC Co., Ltd. (IJ1-16)

Claims (1)

[Claims] The movement is executed according to the commands of the program, and the movement is forcibly stopped by the skip signal input from the outside.
In a numerical control device having a skip function for moving to the next block, a skip condition determining means for determining a skip condition from a program command read from a program reading means and a skip signal generated by various conditions issued from the outside are inputted. The present invention is characterized by comprising a skip signal input means, and a skip determination command means for determining when to skip and a block to be skipped and next processed based on the outputs from the skip condition determining means and the skip signal input means. A numerical control device with a complex skip function.