JP2002373008A - Numerical controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a numerical controller, with which a stopped working program can be restarted from an arbitrary position in completely the same state as at a time point running the stopped working program when restarting the working program after stop. SOLUTION: This device has an analyzing means 51 for analyzing the working program, a designating means for designating a block to save the analyzed result of this analyzing means 51, a retention means 210 for retaining the analyzed result of the block designated by this designating means, and a restoring means for restoring the analyzed result saved by the retention means at need.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical control device, and more particularly to re-execution of a machining program of a numerical control device and confirmation after modification of the machining program.

[0002]

2. Description of the Related Art A numerical controller executes a numerical control process based on a machining program, drives a machine tool based on a result of the process, and performs machining on a work as instructed.

FIG. 9 is a block diagram of hardware of a numerical control device. In FIG. 9, reference numeral 10 denotes a numerical controller. The microprocessor (CPU) 12 is a center of control of the whole numerical controller 10, reads a system program stored in the ROM 13 via the bus line 11, and controls the numerical controller 10 according to the system program. I do. The RAM 14 stores temporary calculation data, display data, and the like. CMOS1
5 stores a machining program, tool data, various parameters, and the like. The CMOS 15 is always backed up by a battery (not shown), and the stored data is retained as it is even when the power of the numerical controller 10 is turned off.

[0004] An interface 16 is an interface for an external device, and is a floppy disk drive (FD).
And an external device 17 such as a personal computer (PC). An external device 17 such as a floppy disk device (FD) or a personal computer (PC) can input and output a machining program, tool data, various parameters, and the like to and from the numerical controller 10.

[0005] Graphic control circuit (CRTC) 18
Converts digital data such as the current position of each axis, an alarm, a machining program, various parameters, and image data into an image signal and outputs the image signal. This image signal is transmitted to the numerical controller 1
0 to the CRT 19 of the operation board 22 on the CRT 1
9 is displayed. The keyboard control unit 20 receives data from the keyboard 21 on the operation board 22 and passes the data to the microprocessor 12.

The axis control circuit 23 includes a microprocessor 1
In response to the movement command of each axis from 2, the movement command to each axis is output to the servo amplifier 25. In response to the movement command, the servo amplifier 25 drives the servo motors 34 of the respective axes mounted on the machine tool 30. The servomotor 34 has a built-in pulse coder for position detection (not shown), and the position signal is fed back from the pulse coder as a pulse train. By performing F / V (frequency / speed) conversion of this pulse train, a speed signal can be generated. In FIG. 9, the position signal feedback line and the velocity feedback line are omitted.
The servo motor 34 has an X axis, a Y axis, a Z axis,
For shafts.

The spindle control circuit 26 outputs a spindle speed signal to a spindle amplifier 27 in response to a spindle rotation command and a spindle orientation command. The spindle amplifier 27 receives the spindle speed signal and rotates the spindle motor 33 at the commanded rotation speed. In addition, the spindle is positioned at a predetermined position by an orientation command.

[0008] Programmable machine controller P
The MC (PMC) 28 is built in the numerical controller 10 and controls the machine with a sequence program created in a ladder format. That is, the M command, which is commanded by the machining program,
According to the S command and the T command, these are converted into necessary signals on the machine side by a sequence program and output from the I / O unit 29 to the machine tool 30 side. This output signal activates various devices on the machine side. The machine tool 30
It receives signals from the limit switches on the side and switches on the machine operation panel, performs necessary processing, and passes the signals to the processor 12.

As shown in FIG. 10A, the machining program 201 of the numerical control device includes a plurality of blocks 2.
02, a series of operations of the numerically controlled machine tool are commanded in each block 202. This block 202 is usually described in a variable block word address format as shown in FIG. 10B, one block is composed of several words, and the word is an address (alphabet) indicating the meaning of a numerical value. Followed by a number. This is called a word address.

The words include, for example, the following. (1) Sequence number Shown by the address N and the numerical value following it. A number assigned to indicate the relative position of the block.

(2) Preparatory function Also called a G function, it indicates the type of control function in that block. The instruction prepares the control device to perform its function. For example, G00 causes positioning G01 to execute linear interpolation.

(3) Dimension word (interpolation function) This word indicates the amount of movement or the coordinate value of each axis of the function, and generally consists of a sign and a numerical value following an address indicating the coordinates of a numerically controlled machine tool. . X, Y, Z,
U, V, W, A, B, C, etc. are used. The numerical values are described according to the setting unit determined by the control device.

(4) Feed function This specifies the relative speed between the workpiece and the tool during cutting.
It is also called an F function (not shown in FIG. 10B). (5) Spindle function Also called S function, it specifies the number of revolutions of the spindle. (6) Tool function Also called a T function, it designates the number of a possessed tool in a machine having a tool changing function such as a machining center or a lathe. (7) Auxiliary function Also called the M function, it instructs the operation of the machine.

At the end of the block, a character ";" (EOB: End of Block Character), which indicates the end of the block, is given.

The numerical controller repeatedly reads, analyzes, and executes the machining program 201 shown in FIG. 10 block by block. The analysis and execution of the machining program 201 is performed by the same processing as a so-called normal interpreter. FIG. 11 illustrates the processing of a general interpreter. The operation of the interpreter reads the source program (100) for one instruction (102), analyzes it (103), and converts it into an intermediate language (101) lower in level than the language of the source program. Then, the program in the intermediate language is executed (104), and the result is output (105). The above processing is repeated until a termination command is received. In the interpreter method, the execution time is slower than a compiler that translates a source program into machine language and executes it all at once.

FIG. 12 shows a processing method of the machining program 201 performed by the numerical controller. The processing program (201) is read for one block (50), and is analyzed (51), and command data (221) for controlling the machine tool is generated from the analysis result. Based on the command data (221), an appropriate command is given to the machine tool (30) (52) to control the machine tool (30) according to the machining program (201).

FIG. 13 shows a machining program 2 of the numerical controller.
It is an explanatory block diagram regarding processing of No. 01. In the machining program 201 of the numerical controller, only necessary parts are described in one block, and other parts can be omitted. This omitted part is supplemented by the numerical control device so that the machining program 201 can be correctly executed.

When the machining program 201 shown in FIG. 13A is executed, as shown in FIG. 13B, the current tool position is shifted to the position of (X, Y) = (100.0, 100.0). Suppose there is. Here, G1X300. Y100. F20. Is executed, the tool moves linearly to the designated coordinate position (X, Y) = (300.0, 100.0) at a feed rate F = 20.0. It is assumed that the coordinate values in the machining program 201 are given by the absolute value command. The next block is X600. Y700. Is executed, the tool moves linearly to the designated coordinate position (X, Y) = (600.0, 700.0) at a feed rate F = 20.0.

In the second block, only the coordinate value of the end point is specified, but the numerical control device performs a modal process to supplement the omitted part of the machining program 201. The modal processing of the numerical control device is a function of once giving a command to continue a previously given command as long as a new command is not given. For example, FIG.
, The second block is X600. Y700. , This block is designated G1X600. Y700. F20. And processing assuming that it has been instructed.

As described above, in the analysis processing of the machining program 201 of the numerical controller, the analysis result of the machining program 201 before a certain block greatly affects the analysis result of the block.

In the interpreter system, it is necessary to analyze the machining program 201 each time. Generally, this analysis process requires a considerable amount of time. Since the numerical controller controls the machine tool, if it takes time for the analysis between the blocks of the machining program 201, there is a possibility that the machine feed stops between the blocks.
In order to prevent this, as shown in FIG. 14, a block (block n +) ahead of the block being executed (block n) is used.
m) is analyzed first, and the result of the analysis is stored in the command data storage buffer 220 to prevent a situation in which the machine feed stops between blocks during the analysis time.

The machining program 201 is analyzed by the machining program analyzing means 51, and the machining program 2 up to that time is analyzed.
The analysis result is extracted from the operation data 211 storing the analysis result of No. 01 and the data of the block to be analyzed.
Command data 221 which is information necessary for controlling the machine tool is generated from the extracted result, and the generated command data 221 is sequentially stored in the command data storage buffer 220. The command data storage buffer 220 has a ring-shaped buffer structure, and stores command data of the current block and subsequent blocks.

The command data executing means 52 stores the command data 22
1 to control the machine tool, and when the processing for one block is completed, the used command data 221 is deleted from the command data storage buffer 220 and the next command data 221 is deleted.
And continue control of the machine tool. The new program data 221 is stored in the deleted buffer part by the machining program analysis means 51. In this way, as long as the command data storage buffer 220 does not become empty, the command data executing means 52 can continuously execute the control of the machine tool. When the processing of the machining program analyzing means 51 is slower than the processing of the command data executing means 52 and the processing cannot be made in time, the command data storage buffer 220 may become empty.

FIG. 15 shows an example of data stored in the operation data 211. The stored data includes modal data 23 in which modal information is stored.
1, coordinate data 232 in which the position of the tool and the like are stored,
It is composed of a correction amount 233 storing a tool correction amount and the like, a macro variable 234 storing a macro variable value, and the like.

[0025]

FIG. 16 is an explanatory diagram relating to the processing program processing of the numerical controller. During the execution of the machining program 201, a situation may arise in which machining must be interrupted for some reason.
In this case, as shown in FIG. 16A, the processing cannot always be resumed from the block (n + P) where the processing was interrupted, and the processing is resumed from the block (n) preceding the interrupted position. May be necessary.

In such a case, it is not possible to simply read the block from the block n and execute the analysis. This is because, when the machining is interrupted at the block (n + p), the analysis of the machining has finished analyzing a block several blocks before the block, and the block of the block (n) using the operation data 211 in that state. This is because the analysis of the data generally differs from the operation data 211 in the case of analyzing the block (n) from the beginning of the machining program 201 and analyzing the block (n). If the operation data 211 used for the analysis is different, the analysis result is naturally different, so that the operation according to the original machining program 201 cannot be restarted.

Therefore, when such a situation occurs, the processing is restarted from the block (n) by re-analyzing the processing program 201 from the beginning using a function called modal search. However, when the machining program 201 is long, there is a problem that this analysis takes a long time, and time until machining restart is wasted. In order to solve this problem, a technique has been devised, as disclosed in Japanese Patent Application Laid-Open No. 7-152416, in which the state at the time of interruption of the execution of the machining program 201 is stored, and the state at the time of interruption, which is stored when the machining is resumed, is restored. However, in such a method, the processing can be resumed only from the position where the processing was interrupted, and it is necessary to restart the processing from the block (n) preceding the interrupted position as the object of the present invention. There is a problem that can not be.

When the machining program 201 is created, it is necessary to confirm whether the machining program 201 can perform machining correctly. As shown in FIG. 16 (B), in this confirmation work, the machining program 201 is checked using various functions of the numerical controller, and if an error is found in the machining program 201, the machining program 20
Make 1 correction. However, in the machining program 201 of the numerical control device, the contents of the previous block may considerably affect the later block.
When a part of 01 is corrected, there may be a case where a part after that is not corrected.

For example, reference numeral 201 in FIG. 8 denotes a machining program before modification. Here, it is assumed that a part of the machining program 201 is modified to create a machining program 203. The correction part is the feed number designation F150 in the sequence number N101.
It is assumed that 0 is newly set. With this setting, the command of the feed speed is processed modally (the value of the feed speed F once commanded is regarded as having been commanded as it is until another value is commanded again) until then. ,
The feed speed F of the block with the sequence number N105 is 10
What should have been 00, the sequence number N10
Since the command of the feed speed F is set to 1500 at 1, the feed speed F of the block with the sequence number N105 is changed to 1500. For this reason, when the machining program 201 is modified, it is necessary to carefully check whether or not the portion that has not been modified is affected, and there is a problem that the burden for this is large.

The present invention has been made in order to solve the above-described problems. When the machining program is resumed after the interruption, a numerical value which can be resumed from an arbitrary position in the same state as the execution point of the suspended machining program It is an object to provide a control device.

Further, the present invention provides a numerical controller capable of easily confirming whether a part of a machining program is modified and a machining program after the modified part becomes a command equivalent to the previous one. With the goal.

[0032]

A numerical controller according to the present invention analyzes a given machining program and solves the above-mentioned problem by controlling a machine tool or the like according to the contents specified in the machining program. In the numerical control device for controlling, analyzing means for analyzing the machining program, designating means for designating a block for storing the analysis result by the analysis means, and storing the analysis result of the block designated by the designating means And a restoring means for restoring the analysis result stored in the saving means when necessary.

The numerical controller according to the present invention analyzes a given machining program and controls the machine tool according to the contents specified in the machining program. Means, designating means for designating a block for saving the analysis result by the analyzing means, saving means for saving the analysis result of the block designated by the designating means, and said saving means at the time of the next machining program analysis And a notifying means for notifying an operator that the result of the comparison is different when the result of the comparison is different. is there.

The numerical controller according to the present invention analyzes a given machining program and analyzes the machining program in a numerical controller that controls a machine tool or the like according to the contents specified in the machining program. It has an analyzing means, a storing means for storing a state immediately before execution of the machining program analysis, and a restoring means for restoring the analysis result stored in the storing means when necessary.

Further, in the numerical controller according to the present invention, the designating means designates to store the analysis result for each predetermined number of blocks.

Further, in the numerical controller according to the present invention, the designating means designates to store an analysis result of a block at an arbitrary position in the machining program designated by the operator.

In the numerical controller according to the present invention, the storage means is a ring-shaped buffer.

Further, in the numerical controller according to the present invention, when an analysis result exceeding a predetermined number is to be stored in the ring-shaped buffer, a new analysis result is stored by deleting the analysis result in order from the oldest one. Things.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 6, FIG. 9, and FIG. FIG. 1 is a block diagram of a main part of a numerical control device according to the present invention. In the first embodiment, an operation data storage buffer 210 (corresponding to a storage unit) is provided in the CMOS 15 in FIG. 9, and the contents of operation data 211 (see FIG. 15) in which the analysis result of the machining program 201 is stored are described. In the operation data storage buffer 210, operation data 211 relating to a specific block can be stored together with a sequence number and a block number. The operation data storage buffer 210 can store m (m is an integer of 1 or more) operation data 211.

The operation data 211 stored in the operation data storage buffer 210 can be taken out as needed, and the contents of the operation data 211 can be rewritten. Thereby, the operation data storage buffer 21
It is possible to faithfully restore the internal state of the numerical control device at the time when it is stored in 0. The other hardware configuration is the same as the conventional one.

FIG. 2 is an explanatory diagram of a block for storing operation data 211 according to the first embodiment of the present invention. In FIG. 2, the operation data 211 is stored in the operation data storage buffer 210 for each of p blocks (p is an integer of 1 or more). The value of p is arbitrarily specified by the operator using the keyboard 21 from a setting screen (not shown) for specifying the storage block interval displayed on the CRT 19 (corresponding to a specifying means). In FIG. 2, a hatched block 202 is a block for storing the operation data 211, and FIG. 2 shows a state in which the operation data is stored at five block intervals (p = 5).

FIG. 3 shows a method (designating means) of specifying a block for storing operation data 211 according to the first embodiment of the present invention.
FIG. Note that the one disclosed in FIG.
The operation data 211 is stored at an arbitrary position (unequally-spaced position) desired by the operator, in addition to the operation data 211 stored at equal intervals described in the above. A block in which the operation data 211 is to be stored is designated. The designation method is to move the cursor to the block 60 for storing the operation data 211 with the cursor keys 61 and 62, and to select “INPU
It is designated by pressing the "T" key 63. The information of the designated block is a CMO that stores the operation data 211.
It is stored in the block designation table 64 provided in S15 (see FIG. 9). The block designation table 64 that stores the operation data 211 stores the sequence number (N) and the block number (B) of the designated block. The block number referred to here is cleared to “0” in a block for which a sequence number is specified, and is incremented by one for each block in a block for which a sequence number is not specified. This is information for specifying the position of each block in the machining program. The operator designates in advance the block of the part where the processing may be restarted or the part where the processing is desired to be confirmed by this function.

FIG. 4 is a flowchart of a method (storage means) for storing operation data according to the first embodiment of the present invention. First, the value of the block counter (C) is initialized to "0" (S101). Next, one block of the machining program is read (S102). The read machining program for one block is analyzed using the operation data 211, and the analysis result is reflected on the operation data 211 (S10).
3). Command data 221 is generated from the operation data 211 and stored in the command data storage buffer 220 (S10).
4).

Next, it is determined whether the analyzed block is a block to be stored (S105). This determination is made based on whether the value of C is P (P is an integer value of 1 or more and is the interval between storage blocks specified by the operator). If it is a block to be stored, step S107 is executed; otherwise, step S106 is executed. This is a process for storing operation data at block intervals designated by the operator, and "C" is a counter for that. That is, the operator sets every 100 blocks (P
= 100), the operation data 211 is designated to be stored, and the count of each block is counted and the value of “C” is 1
The operation data 211 is stored every time the value becomes 00, and at this time, the counter value “C” is cleared to “0”, so that the operation data 211 can be stored for each designated block.

If "NO" in S105, it is determined whether the analyzed block is an operator designated block (S106). This determination is made based on whether the sequence number (N) and the block number (B) of the analyzed block are designated in the designation table 64 of the block storing the operation data. If it is a designated block, step S10
7, and otherwise execute step S109. This is a process corresponding to a case where the operator has previously designated a block of a portion that may restart machining or a block of a portion whose machining is desired to be confirmed.

If "YES" in S105 and S106,
The analysis result operation data 211 is stored in the operation data storage buffer 210 (S107). Here, the operation data storage buffer 210 is a ring-shaped buffer, and is overwritten with new data in order from the oldest one. In other words, old data is stored in the operation data storage buffer 210 in order from the latest operation data 211 to be stored in accordance with the storage capacity of the buffer.

In step S108, the value of the block counter (C) is initialized to "0". In step S109, the value of the block counter (C) is counted up by one. In step 110, it is determined whether or not the analyzed block is the last block of the machining program. If it is the last block, the analysis of the machining program has been completed, so the processing is terminated. Repeat the process.

FIG. 5 shows a restart process (restoring means) according to the present invention.
FIG. 251 execution of machining program 201
(FIG. 5A). And
It is assumed that the processing is restarted from the block 252 (FIG. 5B). In this case, the operation data 211 stored in the operation data storage buffer 210 before the restart position block 252 is searched. In the figure, 241,
It is assumed that 242 and 243 are blocks of the operation data 211 stored in the operation data storage buffer 210.
As a result of the search, 242 operation data storage buffer 21
Since the block of the operation data 211 stored in 0 is extracted, the operation data 211 is restored.

Next, the block 252 to be restarted by performing a modal search on the blocks from the position 242 of the restored block to the block 252 to be restarted.
The operation data 211 at the time when the analysis of the data is started is restored (FIG. 5C). As a result, it is possible to obtain operation data 211 completely equivalent to the result of the analysis from the beginning of the machining program again.

FIG. 6 is a flowchart of the restart processing (restoring means) according to the first embodiment of the present invention. First, the position of the restart block is specified (S201). This means that the operator specifies the position on the machining program at which machining is to be resumed by using the sequence number and the block number. Note that this designation method is based on the operation data 211 of an arbitrary block described in FIG.
No. 3 is specified in the same manner as the method of storing it. Next, it is confirmed whether the designated restart position exists in the machining program (S202). This is to confirm whether or not the block specified by the sequence number and the block number by the operator exists in the machining program. If the restart block is correctly specified, that is, if the specified block exists in the machining program, step S203 is executed, and if the restart block is not correctly specified, step S201 is executed again.

If "YES" in the step S202, the operation data storage buffer 2 before the block at the restart position is set.
A search is made for a block of the operation data 211 stored in 10 (S203). Before the block at the restart position,
If there is a block of the operation data 211 stored in the operation data storage buffer 210, step S20
5 is executed, and if not, step S207 is executed (S204). In this case, the search is performed from the beginning of the machining program.

In step S205, the operation data 211 stored in the operation data storage buffer 210 is extracted (S205), and the operation data is replaced with this data (S206). Thereby, the internal state of the numerical controller at the time when the operation data 211 is stored is completely restored.

A modal search is performed from the position of the restored block to the block to be restarted (S207).
As a result, the analysis of the block to be restarted can be performed in exactly the same state as the analysis from the beginning of the machining program. Finally, the operation is restarted from the specified restart block (S208).

In the first embodiment, the operation of storing the blocks to be stored in the operation data storage buffer 210 at fixed block intervals and the operation of storing the blocks specified by the operator are performed together. If necessary, only one of them may be performed. Further, the operation data may be stored in a predetermined special block (for example, a subprogram call block, a fixed cycle call block, or the like).

Embodiment 2 Next, Embodiment 2 of the present invention
Will be described with reference to FIGS. 1 to 4 and FIGS. 7 to 9. As described in the section of the problem to be solved by the invention, when the machining program 201 is created,
It is necessary to confirm whether the processing can be performed correctly in Step 1. As shown in FIG. 16 (B), in this confirmation work, the machining program 201 is checked using various functions of the numerical controller, and if an error is found in the machining program 201, the machining program 201 is corrected. . However, in the machining program 201 of the numerical control device, the contents of the previous block may considerably affect the later blocks. May be affected. For this reason, when the machining program 201 is modified, it is necessary to carefully check whether or not the portion that has not been modified is affected, and there is a problem that the burden is large. No. 2 is for solving this problem.

Therefore, in the second embodiment, the function of storing the operation data of an arbitrary block of the machining program in the operation data storage buffer 210 of the CMOS 15 in advance described with reference to FIG. The operation data of an arbitrary block of the machining program is stored in advance in the operation data storage buffer 210 provided in the CMOS 15 together with the sequence number and the block number. The operation data to be stored is the operation data of the block after the block to be corrected, and the operation data of the block that the programmer wants to check.

For example, in the example of FIG. 8 (201 is a machining program before modification, 203 is a machining program after modification), the programmer assigns F1500 to the block of N101.
Is added and only the block is set to the feed speed of F1500 (the block N105 remains F1000), the programmer stores the operation data of the block N102 in the operation data storage buffer 210 in advance. In this case, since the blocks N102 to N104 are fast-forward and the fast-forward speed does not depend on the feed speed of the previous block, the operation data of the block N105 is stored in the operation data storage buffer 210 in advance. You may. When the programmer wants to add F1500 to the block of N101 and set the feed speed of F1500 not only for the block of N105 but also for the block of N105, the programmer stores the operation data of the block of N106 in the operation data storage buffer 210 in advance. Let it be.

Then, by comparing the operation data stored in advance in the operation data storage buffer 210 with the operation data of the currently executed machining program as described above, the blocks subsequent to the correction block execute the previous machining program. This is to confirm whether the state of execution and the state of execution of the machining program this time are exactly the same.
If the two machining programs are equivalent, they should be in exactly the same state. If they are different, the same machining result as the previous time may not be obtained.

FIG. 7 is a flowchart of a block equivalence checking process (comparing means and notifying means) according to the second embodiment of the present invention. In FIG. 7, first, one block of a machining program (modified machining program) is read (S301). The processing program for one block that has been read is analyzed using the operation data 211, and the analysis result is reflected on the operation data 211 (S302). Command data 221 is generated from the operation data 211 and stored in the command data storage buffer 220 (S303).

It is determined whether the analyzed block is a block of the machining program before correction stored in the operation data storage buffer 210 (S304). If it is a stored block, execute step S305;
Otherwise, execute step S306.

If it is a stored block, it is determined whether or not it matches the contents of the operation data 211 as a result of the analysis (S305). If they completely match, step S306 is executed. If they do not match, step S3 is executed.
Execute 07. In step S306, it is determined whether or not the analyzed block is the last block of the machining program. If the analyzed block is the last block, the analysis of the machining program has been completed, so the processing is terminated. Repeat the process.
If it is not necessary to check the machining program up to the last block, the step of S306 may be omitted.

In step S307, an error is displayed. This error display indicates to the operator which part of the operation data 211 which is the analysis result and which part of the stored operation data 211 are different and how. This provides information necessary for the operator to grasp errors in the machining program.

FIG. 8 shows an example of the error display (notification). In FIG. 8, reference numeral 201 denotes a machining program before correction.
It is assumed that an instruction has been issued to store the operation data of block 5. When the machining program 201 is executed, the operation data of the block having the commanded sequence number N105 is stored. Here, it is assumed that a part of the machining program 201 is modified to create the machining program 203. It is assumed that the correction position is a new setting of the feed speed designation F1500 in the sequence number N101.

With this setting, the command of the feed speed is modal until then (the value of the feed speed F once commanded is regarded as the same value commanded until another value is commanded again. ) Processed, sequence number N1
Although the feed speed F of the block 05 is supposed to be 1000, the feed speed F of the block of the sequence number N105 is changed to 1500 because the command of the feed speed F is set to 1500 in the sequence number N101. In this case, since the states at the time of execution of the block with the sequence number N105 do not match, an error display as shown in FIG. 8 is performed on the screen 19 of the numerical controller. The sequence number N105 indicating the position of the block in which the error occurred and the block number “0” are displayed, and the contents of the block (N105
G01Z__;) is displayed, and which part is different is displayed as “New” and “Old”. Here, the previous feed speed F was 1000, but this time is 150.
It is shown that it has changed to zero. Needless to say, this error notification may be made by voice or the like without using the CRT 19.

Embodiment 3 In the first embodiment, the designation of the blocks to be stored in the operation data storage buffer 210 is stored at a fixed block interval.
In the above example, the state immediately before the execution is executed when the machining program is executed, and the state immediately before the execution is stored as needed. The program may be restored when the program is executed. That is, normally, the analyzed state of the specific block is stored, but at the beginning of the machining program, the state at the time of starting the execution of the machining program is stored.

By restoring the stored state in this way, it is possible to always start from the exact same state when executing the machining program. This is effective, for example, when a machining program such as a user macro program changes internal variable values, and when the machining program is executed from the beginning, the state is different from the previous state. That is, when a machining program including a user macro is executed for checking and then actual machining is attempted, the value of a variable is changed due to the execution of the check in the past, and the actual machining is considered. It is possible to easily prevent such processing from being disabled. Needless to say, this configuration can be combined with the first and second embodiments.

[0067]

As described above, according to the present invention, even when the execution of a machining program is interrupted and resumed in the middle of the machining program, the state before the interruption is exactly changed from an arbitrary position. The machining program can be quickly and accurately restarted in the same state.

When the machining program is modified, it is possible to reliably determine whether the machining program after the modification is completely equivalent to that before the modification, thereby preventing an unexpected situation due to a mistake in modifying the machining program. It becomes possible.

Since the state at the start of the machining program can be restored, even if the machining program changes its internal state when the machining program is executed, the machining can always be started from the same state.

[Brief description of the drawings]

FIG. 1 is a main part block diagram of a numerical control device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a block that stores operation data according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a method of specifying a block for storing operation data according to the first embodiment of the present invention.

FIG. 4 is a flowchart of a method for storing operation data according to Embodiment 1 of the present invention.

FIG. 5 is an explanatory diagram of a restart process according to the first embodiment of the present invention.

FIG. 6 is a flowchart of a restart process according to the first embodiment of the present invention.

FIG. 7 is a flowchart of a block equivalence check process according to the second embodiment of the present invention.

FIG. 8 is a diagram showing an example of an error display according to Embodiment 2 of the present invention.

FIG. 9 is a block diagram of hardware of the numerical control device.

FIG. 10 is an explanatory block diagram related to a machining program of the numerical control device.

FIG. 11 is an explanatory diagram related to the processing of the interpreter.

FIG. 12 is an explanatory block diagram related to processing of a machining program of the numerical controller.

FIG. 13 is an explanatory diagram relating to a machining program of the numerical control device.

FIG. 14 is an explanatory block diagram related to processing of a machining program of the numerical controller.

FIG. 15 is an explanatory block diagram of operation data of the numerical controller.

FIG. 16 is an explanatory diagram relating to a machining program process of the numerical controller.

[Description of Signs] 10 Numerical control device, 15 CMOS, 16 interface, 17 external equipment, 18 graphic control circuit (CRTC), 19 CRT, 20 keyboard control unit, 21 keyboard (KEY), 22 operation board,
23 axis control circuit, 25 servo amplifier, 26 spindle control circuit, 27 spindle amplifier, 28 programmable machine controller (PMC), 29 input / output unit (I / O unit), 30 machine tool, 3
3 spindle motor, 34 servo motor, 50 machining program reading means, 51 machining program analysis means, 52 command data execution means, 60 block for storing operation data, 61 cursor keys (moving upward), 6
2 cursor key (move down), 63 designation key, 64
Designation table of blocks for storing operation data, 10
0 source program, 101 intermediate language, 102 source program reading means, 103 source program analysis means, 104 intermediate language execution means, 105 output result, 201 numerical control device ground control device machining program, 202 1 block, 210 operation Data storage buffer, 211 operation data, 220 command data storage buffer, 221 command data, 231 modal data,
232 Coordinate data, 233 Correction amount, 234 Macro variable, 241 Blocks 1 and 24 storing operation data
2 Block 2 where operation data is stored Block 243 where operation data is stored Block 251 where execution is interrupted Block 252 where execution is restarted

Claims (7)

[Claims] 1. A numerical control device for analyzing a given machining program and controlling a machine tool or the like in accordance with the contents specified in the machining program, an analyzing means for analyzing the machining program, and an analyzing means for analyzing the machining program. Designating means for designating a block for storing the analysis result by the method, a storage means for storing the analysis result of the block designated by the designating means, and restoring the analysis result stored in the storage means when necessary. A numerical control device comprising a restoration unit. 2. A numerical control device for analyzing a given machining program and controlling a machine tool or the like in accordance with the contents specified in the machining program. Specifying means for specifying a block for storing the analysis result, storing means for storing the analysis result of the block specified by the specifying means, and data stored in the storing means at the time of the next machining program analysis A numerical control device comprising: comparing means for comparing newly analyzed results; and notifying means for notifying an operator of a difference when the results of comparison by the comparing means are different. 3. A numerical control device for analyzing a given machining program and controlling a machine tool or the like in accordance with the contents specified in the machining program. A numerical control device comprising: a storage unit for storing a state immediately before execution; and a restoration unit for restoring an analysis result stored in the storage unit when necessary. 4. The numerical control device according to claim 1, wherein said specifying means specifies to store an analysis result for each predetermined number of blocks. 5. The numerical value according to claim 1, wherein said specifying means specifies to store an analysis result of a block at an arbitrary position in a machining program specified by an operator. Control device. 6. The numerical control apparatus according to claim 1, wherein said storage means is a ring-shaped buffer. 7. The numerical value according to claim 6, wherein when an attempt is made to store more than a predetermined number of analysis results in the ring-shaped buffer, new analysis results are stored by deleting oldest ones in order. Control device.