JPH03206505A - Numerical controller - Google Patents

Abstract

PURPOSE:To deal with a request produced even to the control of a special machine tool without remodeling a computer numerical controller CNC by programming previously a macroinstruction to call out a macroinstruction corresponding to a numerical control function. CONSTITUTION:When a macroinstruction is called out of a macro-register memory 24 for a user, a system variable included in the user's macroinstruction is read out of a variable memory 28. Then a prescribed numerical control processing operation is carried out according to the contents of the system variable and based on the user's macroinstruction. Thus it is possible to carry out various special processing operations desired by users without remodeling the software of the CNC.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a numerical control device, and particularly to a device that can perform various special processing desired by a user without modifying the software of the numerical control device.

(Prior Art) A numerical control device executes numerical control processing based on a command program instructed from a paper tape or the like, and drives a machine tool based on the processing result to process a workpiece according to the command.

FIG. 1 is a block diagram of such a conventional numerical control device.

The command program read block by block from the tape reader 1l is first input to the control device 12, which has a built-in processing device, control program memory, and the like. Next, the control device 12 executes numerical control processing according to the command program and drives the servo motor of the machine tool to move the table or cutter according to the movement command, or the high-power control device 13
Controls such as turning on/off the coolant of the machine tool 14, normal rotation/reverse rotation/stopping of the spindle, etc.

In addition, 15 is an operation panel with switches and buttons for commanding home return, jog, etc., 16 is a manual data input device (hereinafter referred to as MDI) for manually inputting one block of command data, etc., and 17 is a machine. This is a display unit that displays the current position, etc., and is controlled by a computer numerical control device (CN
C) is configured.

By the way, the commands given to conventional numerical control devices include movement commands, speed commands, auxiliary function commands that instruct the machine tool to perform predetermined mechanical operations, spindle function commands that instruct the spindle rotation speed, and tool exchange instructions. There are tool function commands to perform and other preparation function commands, etc., and when they are sequentially read, the control device 12 in this CNC decodes and executes those commands, so the machine tool and processing device (CP
It was not possible to change the order of the command programs in accordance with the internal state of the system, such as U), or a state signal set there by an operator from the outside.

(Problem to be Solved by the Invention) However, recently there has been a demand for improved functionality of CNCs, and it has become necessary to have the ability to command processing contents from a command program depending on the state of the machine tool or NC. Additionally, CNC software is generally designed to control standard machine tools, but depending on the machine tool,
Or even for the same type of machine tools, the user may require special machine tool control.

In such cases, conventionally the CNC software has been modified each time to enable control in accordance with the special specifications. In other words, numerical control manufacturers modify software each time a special machine tool control is required, which requires a great deal of effort and time, resulting in increased labor costs and, ultimately, increased costs. was.

Therefore, traditionally, when there is a group of instructions in a part program that have different constants but the same statement, in order to avoid having to program each time, a macro definition is added to that group and a specific symbol is added to it. There was an idea to perform numerical control processing by giving and storing a macro name and calling it from a command program programmed with a macro call command including a macro identification name.

One type of macro definition is a programming method called a custom macro or user macro.

This allows a function consisting of a group of commands created by the user or machine manufacturer to be registered in advance in the NC device, and the macro can be called up at any time using a simple procedure, just as if special software had been installed. This is a function that can be used with

A macro program consisting of a certain group of instructions is a type of subprogram in that a special function can be executed by writing representative instructions in a normal program, but a program is made up of only normal instructions. Instead, it can be configured using variables, calculation commands, and control commands, and it is also possible to pass arguments (parameters) to and from macro call commands, so the numerical control system including the machine tool used can be It is possible to realize specifications that match the user's needs, as well as user-specific fixed cycles and automatic programming.

Here, a group of registered commands is referred to as a user macro body or simply a macro, and a representative command is referred to as a user macro command or a macro call command.

Here, a variable is something that exists in a macro and is used by giving a value to a variable defined when calling and executing a macro, rather than giving a numerical value directly to a certain address. , which gives macros flexibility and versatility.

For example, the variable is # followed by the variable number i (1, 2,...
) and can be expressed as #i. i.e. #5, #109, #10
Like 05.

In addition to natural numbers, expressions can also be used as variable numbers; in that case, #[#100],
#[#1001-1], #[#6/2].

You can also replace the number following the address with a variable. That is, programming kuaddress>#i or kuaddress>-#i means that the value of the variable is used as it is, or its complement is used as the command value for that address.

However, the number that can be assigned to a macro variable that can be changed in this way is conventionally limited to a value that is directly specified in a call statement that is a macro call instruction in a command program. Therefore, processing functions such as reading control of various setting values, machine position, modal information, input signals from the machine, timer time, etc., control of sending output signals to the machine, and control of suppressing single block stop can be directly programmed. When executing, it is not possible to have variables that correspond to the multiple types of numerical control processing functions that these machine tools have.
This has not been sufficient to allow users to independently extend the various functions of the numerical control device and configure macro instructions.

Therefore, even if special control is required for a machine tool, the present invention can handle the problem without modifying the CNC software by simply programming a macro call command that calls a macro command corresponding to the numerical control function. The purpose is to provide a cost numerical control device.

(Means for Solving the Problem) In the present invention, a numerical control process is executed based on a command program in which a user macro call command including a macro identification name is programmed, and a machine tool is A numerical control device that processes a workpiece according to commands by driving a machine tool includes a variable memory that stores a system variable that converts the current position amount exchanged between the numerical control device and the machine tool into a variable value, and one or more A macro registration memory that stores in advance a plurality of functional instructions including system variables and which can be identified by the macro identifier as macro instructions of a user macro, and when a macro instruction of the user macro is called from this macro registration memory, the variables macro processing means that reads a system variable included in a macro instruction of a user macro from a memory and executes a predetermined numerical control process in accordance with the macro instruction of the user macro read from the macro registration memory according to the contents of the system variable; This is achieved by a numerical control device characterized by having.

(Operation) According to the present invention, when a predetermined user macro is called from the macro registration memory (24) by a user macro call command and the macro processing means (27) executes macro processing according to the user macro, the system It reads the state quantity of the numerical control device or machine tool corresponding to the variable, determines the system state according to the function command specified by the system variable, and selects the special numerical control processing function required at that time. It can be executed by

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a block diagram of a CNC according to the present invention.

In the figure, 2l is a command tape on which a command program is perforated, and 22 is a user macro command tape on which one or more user macros are perforated.

As shown in FIG. 3, each user macro consists of at least (1) a macro identification name (for example, 09001) and (2) an instruction using a system variable, which will be described later. (means end of block, and M99 means end of macro) are programmed.

An example of a user macro is shown below. Here #3001
is a system variable.

09001* #3001=O* WHILE [#3001LE#20] DotEND
1*M99* Variables are classified into local variables, common variables, and system variables according to their variable numbers (3001, 20, etc.).

A local variable is a variable that is used locally within a macro, and the variable numbers 1 to 33 are used.

In other words, local variable #i used in a macro called at one point in time and #i used in a macro called at another point in time (regardless of whether or not i has the same value) are treated as different things. I am 11. Therefore, when macro A calls another macro B, such as in multiple calls, there is no risk that a local variable used in macro A will be accidentally used in macro B and its value will be destroyed. . This local variable is used for passing arguments.

Variable numbers for common variables are 100-199, 500-9
99 is used. While local variables are used locally within a macro, common variables are used in common throughout the main program, subprograms called from it, and each macro. Therefore, #i used in one macro A and #i used in another macro are the same, and the common variable resulting from the operation in one macro can be used in another macro. .

Furthermore, system variables are stored in the system variable memory described later, and unlike local variables and common variables, they have variable numbers (system codes) that correspond to multiple types of numerical control processing functions that the machine tool has. It is a variable that is determined according to the state quantity such as the internal state of the machine tool or 12 NC device.

Furthermore, in addition to normal commands, the command program read from the command tape 21 is programmed with a user macro call command (user macro call) including a macro identification name, and a predetermined user macro is called at an appropriate program step. By calling it, it is possible to execute processing according to the user macro. This user macro call command includes at least G65 (G function command for user macro call),
For example, it has P9001 (P is a word address indicating that 9001 is a macro identification name, 9001 is a macro identification name).

Reference numeral 23 denotes a paper tape league, which reads commands punched in the command tapes 21 and 22. 24 is a macro registration memory, and a plurality of user macros read from the user macro command table 22 are stored in this memory. 25 is a discrimination circuit, 26 is a normal processing section, and 27 is a user macro processing section. Each of these processing units 26 and 27 includes a calculation unit, a control unit, a memory, and the like. tape reader 23
If the information read into the discrimination circuit 25 is the user macro body (identified by the word address O), it is transferred to the macro registration memory 24 and stored therein, and if it is a normal command, it is sent to the next stage normal processing section 26. However, if it is a user macro calling command, it is sent to the corresponding user macro processing unit 27. Note that these processing units 26 and 27 may be configured in common. Further, normal commands and user macro bodies are not mixed on one tape, but are manually input from separate tapes.

Reference numeral 28 denotes a variable memory in which system codes corresponding to each of the plurality of types of numerical control processing functions possessed by the machine tool are assigned, and system variables that define the processing contents to be executed by the function commands assigned to the system codes are stored. , and can be referenced by both the normal processing section 26 and the user macro processing section 27. The use of each system variable #i within the system is fixed according to its variable number i.

That is, in the macro DI area in this variable memory 28,
#1000 to #1035 each store an interface signal consisting of a 16-bit input signal exchanged with the machine tool as its variable value, and in the macro Do area, #11'00 to #1135 respectively store the input signal of the machine tool. The interface signal consisting of a 16-bit output signal sent and received between the two is stored as its variable value, and in the tool offset area, #2001 to #2099 each store the offset amount of 99 types of tools as its variable value. However, in the macro alarm area, a signal that alarms the NC device when #3000 detects an error in the macro is stored as a variable value, and in the clock area, #3001, #3
002 stores a clock signal related to the elapsed time from the reference time as its variable value, and in the automatic operation control area, #3003 stores a signal related to suppression or cancellation of single block stop as its variable value, and position storage. In the area, #3004 stores a signal related to disabling or canceling feed hold and feed rate override as its variable value, and in the modal information area, #4000 to $4012 are the current values of the modal commands, respectively. Signals are stored as their variable values, and in the machine coordinate area, #5001 to #5104 store various machine positions as their variable values.

Reference numeral 29 denotes an ink face circuit that controls input/output interfaces with machine tools, display units, tape punchers, and the like. 30 is a machine tool, 31 is an MDI, 32 is a display unit, and 33 is an operation panel. 34 is an address conversion unit that converts the variable number i into an address of the variable memory 28.

Now, it is assumed that a plurality of user macros from the user macro instruction tape 22 are stored in the user macro registration memory 24 in advance, and an instruction program is read from the instruction tape 21 in this state. The read command is a normal NC
If it is a command, the NC command is input to the normal processing section 26, and the same NC processing as the conventional one is executed. If the command is a user macro calling command, the discrimination circuit 25 calls the corresponding user macro from the user macro registration memory 24, inputs it to the user macro processing section 27, and performs user macro processing to be described later.

Note that not only the user macro but also the command program from the command tables 21 and 22 is stored in the macro registration memory 24 in advance, and the stored NC commands are sequentially read out and the N.
When using the so-called memory operation method for executing C processing, the mode selection switch on the operation panel 33 of the NC is set to tape editing mode to read the program, and then the mode selection switch is set to automatic mode for NC processing. do.

Next, the operation of the present invention will be explained.

(A) Registration of user macros (a) User macros for reading and sending interface signals (output signals to the machine side, input signals from the machine side); 10 types of user macros that instruct the machine side, for example, the amount of movement of a tool. There is a dial, and depending on certain conditions, a predetermined dial value (10
It is assumed that the tool movement must be controlled based on that value. Now, if you need to read the setting value from the third dial, create the following user macro and store it in the user macro registration memory 2.
4 must be registered.

0 9100*...
■# 1132 = # 1132A N D 496
0 R #1...■G 65 P 910
1 T 60* ・・・■#100
=B I N [#1032AND4095]!
...■IF#2012EQO GOTO9100*
...■#100 =-#100
...■N 9100 M 99*
... As mentioned above, user macros are generally different from normal subprograms in that they allow the use of variables, calculation commands, and control commands. , substitution command =, logical product operation command AND, logical sum operation command OR, and conversion command BIN from BCD are used, and by these, various operations between variables can be programmed in the same way as general arithmetic expressions. can. Also, the IF conditional expression>GOTOn, which is one of the control commands that controls the flow of the program, is <conditional expression>
If the following holds true, a command is given to execute the next block starting from the block with the sequence number n in the same program. Here, the conditional expression EQ means =, and in addition, NE, GT. LT%GE and LE are respectively ≠,
Can be used as symbols to mean >, <, ≧, ≦.

Among the above user macros, ■ is a block indicating a macro identification name, and 09100 is a user macro identification name that reads 3 digits of BCD. 3 is a block for exiting address data. Now, in the present invention, the data to be output to the machine side is composed of 16 bits as shown in FIG. 4(b), and the address data to be output to the machine is written in the first to fourth bits. However, the 5th to 9th bits are used for other purposes, and the 10th to 16th bits are not used. Note that the variable register corresponding to local variable #1 (this constitutes a part of the variable memory 28) contains address data indicating the third dial as its variable value. It is assumed that the 16-bit data shown in FIG. 4(b) output in the previous process is stored as the variable value in the variable register corresponding to system variable #1132. .

Therefore, 496 in decimal is expressed as a binary number where the 5th to 9th bits are 1 and the other bits are O, so by AND (logical product) of ■, the 5th to 9th bits of #1132 The contents of the bits are saved, and the address data of the third dial to be read this time is written into the first to fourth bits of #1132 by OR (logical sum).

■After sending the address data of ■ above to the machine side,
This is a user macro instruction that waits for a period of time (60 msec) until the machine side can output the value set on the dial (this instruction will be described later).

For ■, read the 3-digit BCD value set on the dial.
This is an instruction to convert to a base number. Now, the variable register of system variable #1032 is as shown in Figure 4(a).
The 16-bit data shown in (3 Q msec) is output from the machine and written.
In figure (a), 3 BCD digits (dial value) are written in the 1st to 12th bits, the code is written in the 13th bit, and the 14th to 16th bits are used for other purposes. be done. Therefore, AND the contents of the variable register corresponding to #1032 and 4095 (all "1")
If you take , the 3 BCD digits written in the 1st to 12th bits of this variable register are extracted and binarized, and the variable register of common variable #100 (which also constitutes a part of the variable memory 28 above) is extracted. ). and,
The sign is determined to be positive or negative in step (2), and if it is negative, the sign is inverted in step (2), and the user macro ends in M99 in step (2).

(b) User macro for obtaining clock time The CNC has two types of clocks, a first clock and a second clock.The first clock is counted in 1 millisecond increments, and (stored in the variable register as the value of the system variable), and the second clock is 0. It is counted in 1 hour (6 minute) increments and is used to measure the total usage time of C and NC (this time is also stored in the variable register as a system variable value).

Now, if the user needs a special use of performing the next work process after 201 Ilsec has passed from a certain time, the user creates the following user macro. The system variables that indicate the time after power-on are 1 3
A system variable indicating the total CNC usage time is stored in the variable register corresponding to #001, and a system variable indicating the total usage time of the CNC is stored in the variable register corresponding to #3002.

0 91QQ*
...■#1=#3001
...■WH ILE [＃30吋一＃
I L E #20] D O 1*...■E N
D1*...
・■M99*
．． ．． , ■ Of the above user macros, ■ is the macro identification name, and ■ is the current time (contents of the register corresponding to #3001).
Macro instruction to set variable register #1 (take in current time), ■ is an instruction indicating the end of the user macro.

Also, WHILE of ■, ■ [<conditional expression>] DOm (m=1.2 =1
ENDm This is a macro instruction that repeats the block from DOm to the block of ENDm while the conditional expression> is satisfied, and if it is not satisfied, the block next to ENDm is executed. Also L E
(LESS or Equal) means ≦, and (#3001- #1) means #3001
, # means subtraction of the contents of the variable register corresponding to 1.

Note that the variable register corresponding to system code #20 has 2
0 is stored.

Therefore, when 20 msec has elapsed and the conditional expression> no longer holds true, the process shifts to (2).

Once the user macros (■ to ■) above have been created, they are punched into the paper tape 22 and read into the tape reader 23.The discrimination circuit 25 identifies the word address O and stores the subsequent user macros in the macro registration memory. 24 to be transferred and stored. This completes the registration of the user macro for setting the clock time.

From the above, the user macro for obtaining the clock time is similar to the normal DWELL function. However, dwell is a function that stops machine operation for a predetermined time and resumes machine operation after the elapse of that time, but the above user macro can measure a predetermined time without stopping machine operation. It has a function that allows you to keep track of time even when the machine is in operation.

(C) Single Block Stop Suppression Macro Command During a tape correctness test, so-called single block control is usually performed, in which the tape is stopped block by block and does not proceed to the next block until the start button is pressed. However, this takes a long time to test whether the tape is correct or not, and in order to shorten the time, the user may use predetermined blocks such as a drilling block after positioning in a drill cycle, a tool pulling block after drilling is completed, etc. There are cases where it is desired to suppress single block control in these blocks, which are regarded as one large block.

Now, when drilling as shown in FIG. 4(c), if you want to suppress single blocks for the drilling command block, create the following user macro and register it in the macro registration memory 24. good. In addition, system variable #
It is assumed that when the variable value of 3003 is 1, single blocks are suppressed, and when it is 0, single blocks are suppressed.

0 9081*・・・・・・・・・・・・・・・・・・
Macro identification name #3003 = l*・・・・・・・
・・・・・・・・・ Single block suppression G 002
- #18*・・・・・・・・・ Drilling G 01Z
- #261・・・・・・・・・ Drilling GOOZ
[#18* +#26*] *... Tool removal #
3003 = Q*・・・・・・・・・・・・・・・
・・・・・・・・・・・・ Suppression release M99* ・
・・・・・・・・・・・・・・・・・・・・・・・・
- End of macro (d) Disabling feed hold and feed rate override Some users may want to disable feed hold or keep override at lOO% when programming thread cutting or tapping. In this case, feed hold, override disabled system variable #
3004, and determine that system variable #3004 is invalid when it is 1 and invalidated when it is 0, and create a user macro and register it in the variable memory 28 in the same way as the single block stop suppression macro in (C) above. . The following is an example of a user macro in which feed hold and override invalidation are applied to the tapping cycle (G84).

09080... Macro identification name # 30
03= 1*... Single block stop suppression G 002-# 18* # 3004= II... Feed hold etc. invalid G 012-# 26* M05* M04* Z # 26* # 3004 = 01... Canceling invalidation of feed hold, etc. M 05* M03* G 002 #18* #3003= 0... Canceling single block stop suppression M99* (e) Reading modal information Modal information is defined previously. This refers to information that does not change until it is defined next, such as a feed rate command and some G function commands, such as G function commands for incremental/absolute instructions.

Now, the command tape is programmed using incremental/absolute combined programming, and there is a block of macro call commands between the first and second blocks commanded by absolute, and the user macro called by the macro call command is an incremental command. It is assumed that it was created with .

In this case, at the beginning of the user macro, the G function command (
modal information) to indicate that subsequent movement commands are incremental. As a result, the NC treats the movement command as incremental until an absolute is specified, and if the absolute of the first block is not restored at the end of the user macro, the movement command of the second block is also considered to be incremental. processing, resulting in malfunction.

Therefore, it is necessary to read and save the modal information at the beginning of the user macro, and restore the modal information at the end of the user macro.

The following is an example of a user macro that saves and restores modal information (incremental/absolute G function commands) in a polling cycle (G86). It is assumed that the G function command that instructs absolute is stored as a variable value in the register corresponding to system variable #4003.

0 9086* #l=#4003*... Save modal informationz
8 # 3003 = 1*... Single block stop suppression GOOG91Z-#18* G91 is the G function command of incremental instruction G 012-# 26* M 05* GOOZ [#18* + #26] *M03* #3003=0*... Single block stop suppression release G#IM99*... Restoration of modal information (f
) Reading current position There may be cases where it is desired to read the current machine position, current command position, etc. and display it or type it out, and the display contents defined by the system variables are determined as shown in FIG. In Fig. 5, the remaining movement amount cut (skip cutting) means that the movement of the machine is stopped by an external remaining movement amount cut signal (skip signal), and the remaining movement amount of the block is cut (no command is given). This function refers to the function to proceed to the next block, when the next block is an absolute command, as shown in Figure 6 (a), and in the case of an incremental command, as shown in Figure 6 (b). Moving. This remaining movement cut (skip cutting) function can be used for various measurements and sizing control of a grinder.

Now, when measuring the depth in the Z-axis direction, set the movement command amount in the Z-axis direction to be larger than the actual depth, and move the contact such as a pressure-sensitive element in the Z direction until the contact touches the bottom surface. When touched, generates a remaining travel cut signal (skip signal),
The depth in the Z-axis direction may be measured by immediately stopping the machine and reading and displaying or typing out the current position in the Z-axis direction.

For such measurements, when a remaining movement cut signal (skip signal) is generated in the user macro, the contents of the variable register corresponding to system variable #5063 are read out and programmed to be displayed or typed out. Just leave it there.

(g) Reading and changing the tool offset amount Although only the operator can set the tool offset amount, some users may wish to be able to change the settings using a programmer. There are also cases where it is desired to know the amount of tool offset.

In such a case, tool offset numbers l, 2,...9
9 as system variables #2001, #2002,...#
2099, # 3Q= in the user macro
By setting #2005, the offset amount can be stored in the variable register of local variable #30,
Also, by setting #2010=#8, the offset amount of offset number lO can be changed to the contents of the variable register of local variable #8.

(h) Other functions such as a function to put the device in an alarm state, a function to display a message on a CRT, a printout function, etc. can be created and registered as user macros.

(B) User macro calling command A user macro calling command is an instruction 3l that is programmed in the command tape 21 to call a predetermined user macro from the macro registration memory 24 and cause the user macro processing section 27 to execute numerical control processing. At least G65P (macro identification name) is commanded.

Now, when a command is read by the tape reader 23 from the command tape 21, the determination circuit 25 determines whether it is a user macro call command or not. If it is a user macro call command, the macro registration memory is stored in accordance with the macro command included in the user macro having the macro identification name specified after the word address P of the call command. The contents of the variable register corresponding to a predetermined system code are called from 24 and delivered to the user macro processing section 27, which executes macro processing and controls the machine tool according to the user macro.

(Effects of the Invention) As described above, in the present invention, a predetermined user macro is called from the macro registration memory in which a plurality of user macros are registered in advance by a user macro calling command, and the macro processing section responds to the user macro. When executing macro processing, instead of improving the CNC software each time, the processing contents executed by the function commands assigned to the system code can be changed arbitrarily to system variables and the multiple types that the machine tool has. By simply specifying the system code corresponding to the numerical control processing function, you can select and execute the special numerical control processing function required. Therefore, the user need only create a user macro for the special control, store it in the macro registration memory, and program the user macro call command in an appropriate location on a command tape, etc., without modifying the CNC software in any way.

As a result, the labor and time required for modifying the software can be saved, and a CNC that meets the user's needs can be provided at low cost. In addition, by using user macros, you can create special specifications that match the machine or system.
Not only is it possible to implement user-specific fixed cycles and automatic programming, but it is also possible to read the current machine position and commanded current position from the numerical control device and display them on the display device or print them out using a printer.
It is possible to easily implement functions that are impossible with conventional numerical control devices.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a conventional numerical control device, Fig. 2 is a block diagram of a CNC according to the present invention, Fig. 3 is an explanatory diagram showing an example of a command program, and Fig. 4 is an explanatory diagram of user macro registration. , Figures (a) and (b) are explanatory diagrams explaining interface signal reading and sending, Figure (c) is an explanatory diagram of the drilling cycle, Figure 5 is an explanatory diagram showing variable symbols and their contents, FIG. 6 is an explanatory diagram illustrating the remaining movement cut function. 21... Command tape, 22... User macro command tape, 23... Tape league, 24... Macro registration memory, 25... Discrimination circuit, 26... Normal processing section,
27... User macro processing unit, 28... Variable memory, 29... Interface circuit. 3 5

Claims (7)

[Claims] (1) In a numerical control device that executes numerical control processing based on a command program in which a user macro call command including a macro identification name is programmed, and drives a machine tool based on the processing result to perform machining on a workpiece according to the command. , a variable memory for storing a system variable whose variable value is the current position amount exchanged between the numerical control device and the machine tool, and a plurality of functional instructions including one or more system variables and identifiable by the macro identifier. is stored in advance as a macro instruction of a user macro, and when the macro instruction of the user macro is called from this macro registration memory, the system variable included in the macro instruction of the user macro is read from the variable memory. A numerical control device comprising: macro processing means for executing a predetermined numerical control process according to a macro instruction of a user macro read from the macro registration memory according to contents of variables. (2) The current position amount exchanged between the numerical control device and the machine tool is a command current position amount that is commanded from the numerical control device to the machine tool (1)
) Numerical control device described. (3) The current position amount exchanged between the numerical control device and the machine tool is a machine current position amount notified from the machine tool to the numerical control device (1)
) Numerical control device described. (4) The macro processing means that executes a predetermined numerical control process according to the macro instruction of the user macro read from the macro registration memory is a display means that displays the command current position given to the machine tool from the numerical control device. A numerical control device according to claim (1), characterized in that: (5) The macro processing means for executing a predetermined numerical control process according to the macro instruction of the user macro read from the macro registration memory is a printing means for printing out the command current position commanded from the numerical control device to the machine tool. A numerical control device according to claim (1), characterized in that: (6) The macro processing means that executes a predetermined numerical control process according to the macro command read from the macro registration memory is a display means that displays the current machine position notified from the machine tool to the numerical control device. A numerical control device according to claim (1). (7) The macro processing means that executes a predetermined numerical control process according to the macro command read from the macro registration memory is a printing means that prints out the machine current position that is notified from the machine tool to the numerical control device. A numerical control device according to claim (1).