JP2007233575A - Numerical controller and control method for machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve working precision and a working speed by smoothly switching an operation under electronic cam control and an operation under NC control, and selecting an optimal control system according to the type of working. <P>SOLUTION: An electronic cam table 60 is provided with a modal information table 66, and a modal information storage part 51 is made to store modal information even in the case of an operation under electronic cam control. When the electronic cam control is switched to NC control, the modal information of the modal information storage part 51 stored in the case of the electronic cam control operation is succeeded for operating NC control. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a numerical control device for a machine tool and a method for controlling the machine tool for moving either the workpiece or a tool for machining the workpiece to machine the workpiece into a desired shape. It is.

  In NC control, a command such as a given spindle rotation command (T code command) or auxiliary machine command (M code command) is memorized until a command for canceling the command or another command is received. There is a function to keep. The stored command is generally called modal information. The modal information is set to an initial value at the start of machine operation. The spindle rotation command, auxiliary machine command, etc. stored as modal information are handled in the same way as described even if they are not described in the NC command. Therefore, if the creator of the NC program does not change the command content stored as the modal information, the command related to the modal information can be omitted from the description of the NC program. The NC control device reads NC commands one block at a time, adds modal information to the read NC commands, determines the commands, and controls the machine tool.

  On the other hand, in the electronic cam control, the position data of the moving axis corresponding to the operation amount of the reference axis is stored as electronic cam data before the machine tool is operated. Then, when the movement amount of the reference axis reaches the movement amount stored in the electronic cam data, control is performed so that the moving axis reaches the position stored corresponding to the movement amount. Also, the spindle rotation command and the auxiliary machine command are stored in correspondence with the operation amount of the reference axis, and the commanded operation is started when the reference axis reaches the operation amount.

As a prior document disclosing electronic cam control, for example, there is Patent Document 1.
JP 2003-58211 A

  In the electronic cam control, a series of operations are determined as electronic cam data in the electronic cam table before the machine tool is operated. Therefore, unlike NC control, it is not necessary to read the NC program block by block and add modal information to confirm the operation. For this reason, the modal information is not stored in the conventional electronic cam control.

  In this conventional configuration, when switching from electronic cam control to NC control during operation of a machine tool, if an operation such as machining requiring modal information is performed, all NC commands corresponding to the modal information at the time of switching are all issued. It becomes necessary to command. There is an enormous amount of information stored as modal information. In practice, it has been difficult to accurately describe all of the modal information as NC commands at the time of switching.

  The present invention has been improved in view of these points, and an object of the present invention is to enable smooth switching between electronic cam control and NC control.

  The numerical control device according to the present invention is an NC program in a numerical control device of a machine tool for moving any one of a workpiece and a tool for machining the workpiece into a desired shape. An electronic control unit that operates a machine tool using an NC control unit that operates the machine tool by interpreting the above and an electronic cam table that defines a movement position of the workpiece or the tool on the basis of an operation amount on a predetermined reference axis A cam control unit; an operation switching unit that switches between operation by the NC control unit and operation by the electronic cam control unit; and a modal information update unit that updates modal information during operation by the electronic cam control unit. The control unit stores the modal information stored in the modal information storage unit when the operation switching unit switches from the operation by the electronic cam control unit to the operation by the NC control unit. Wherein the interpreting NC program takes over the information.

  In addition, the numerical control device of the present invention includes a modal information table that describes the modal information on the basis of an operation amount on the predetermined reference axis, and the modal information update unit has an operation amount on the predetermined reference axis. When the movement amount described in the modal information table is reached, the modal information stored in the modal information storage unit is updated to information described in the modal information table.

  Further, the machine tool control method of the present invention includes an electronic cam control for operating a machine tool using an electronic cam table in which a moving position of a workpiece or the tool is determined with reference to an operation amount on a predetermined reference axis. , A machine tool control method for controlling a machine tool by switching between NC control for operating a machine tool by interpreting an NC program, and modally depending on an operation amount on the predetermined reference axis during operation by the electronic cam control The modal information updated when the information is updated and the electronic cam control is switched to the NC control is taken over by the NC control.

  According to the present invention, the modal information is stored in the storage unit even during the operation by the electronic cam control, and when the electronic cam control is switched to the NC control, the modal information corresponding to the switching time is taken over by the NC control, so that the electronic cam Smooth switching between control and NC control becomes possible. Further, by providing a modal information table based on the movement amount of the reference axis in the electronic cam control, it becomes possible to easily store the modal information corresponding to the movement at that time in the storage unit.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. A configuration example of a machine tool to which the present invention is applied is shown in FIG. The machine tool of this embodiment includes a control unit 27, and the control unit 27 controls the driving of the spindle rotating motor 22, the tool moving motor 23, and the workpiece moving motor 24, respectively.

  The spindle rotation motor 22 is connected to the control unit 27 via a drive circuit 28 and a spindle rotation control circuit 29, and rotates the spindle that detachably holds the workpiece. The spindle rotating motor 22 is provided with a pulse encoder 30 for detecting the rotation of the motor 22. The pulse encoder 30 generates a rotation detection signal in synchronization with the rotation of the spindle rotating motor 22 and outputs the rotation detection signal to the control unit 27 and the speed signal generation circuit 31. The speed signal generation circuit 31 converts the rotation detection signal output from the pulse encoder 30 into a spindle rotation speed signal corresponding to the rotation speed of the spindle rotation motor 22, and outputs it to the spindle rotation control circuit 29.

  The spindle rotation control circuit 29 controls the rotation of the workpiece on the spindle so as to have a desired rotation speed based on the clock signal output from the clock signal generation circuit 47 of the control unit 27. Is. That is, the spindle rotation control circuit 29 compares the spindle rotation speed command signal output from the control unit 27 with the spindle rotation speed signal output from the speed signal generation circuit 31, and performs control according to the difference. A signal is generated based on the clock signal. The control signal generated by the spindle rotation control circuit 29 is output to the drive circuit 28.

  Based on the control signal output from the spindle rotation control circuit 29, the drive circuit 28 is used for spindle rotation so that the rotation speed of the spindle rotation motor 22, that is, the rotation speed of the spindle matches the spindle rotation speed command value. The power supplied to the motor 22 is controlled. The drive circuit 28, the spindle rotation control circuit 29, and the speed signal generation circuit 31 constitute a feedback control system for the rotation speed of the spindle rotation motor 22.

  The tool moving motor 23 is connected to the control unit 27 via a drive circuit 32 and a tool feed control circuit 33, and a tool for processing a workpiece is perpendicular to the rotation center axis of the main shaft. Or move in a direction parallel to the main axis. The tool moving motor 23 is provided with a pulse encoder 34 for detecting the rotation of the motor 23. The pulse encoder 34 generates a rotation detection signal at every predetermined rotation angle of the tool moving motor 23 and outputs the rotation detection signal to the tool feed control circuit 33.

  The tool feed control circuit 33 recognizes the actual tool movement position based on the rotation detection signal output from the pulse encoder 34, and outputs the recognized actual tool movement position and the control unit 27. The tool position command signal is compared, and a tool drive signal is generated based on the comparison result. The tool drive signal generated by the tool feed control circuit 33 is output to the drive circuit 32. The drive circuit 32 controls the power supplied to the tool moving motor 23 based on the tool drive signal output from the tool feed control circuit 33. The drive circuit 32 and the tool feed control circuit 33 constitute a feedback control system for the moving position of the tool.

  The workpiece moving motor 24 is connected to the control unit 27 via a drive circuit 35 and a workpiece feed control circuit 36, and moves the workpiece in a direction parallel to the rotation center axis of the main shaft. . The workpiece moving motor 24 is provided with a pulse encoder 37 for detecting the rotation of the motor 24. The pulse encoder 37 generates a rotation detection signal at every predetermined rotation angle of the workpiece moving motor 24 and outputs the rotation detection signal to the workpiece feed control circuit 36.

  The workpiece feed control circuit 36 recognizes the actual movement position of the workpiece based on the rotation detection signal output from the pulse encoder 37, and recognizes the recognized actual movement position of the workpiece and the control unit. The workpiece position command signal output from the unit 27 is compared, and a workpiece drive signal is generated based on the comparison result. The workpiece drive signal generated by the workpiece feed control circuit 36 is output to the drive circuit 35. The drive circuit 35 controls the power supplied to the workpiece moving motor 24 based on the workpiece drive signal output from the workpiece feed control circuit 36. The drive circuit 35 and the workpiece feed control circuit 36 constitute a feedback control system for the movement position of the workpiece.

  On the other hand, the control unit 27 includes a central processing unit 45, a pulse signal generation circuit 46, a clock signal generation circuit 47, a division timing signal generation circuit 48, a RAM (random access memory) 49, a ROM (read only memory) 50, a modal. An information storage unit 51, an NC program storage unit 52, an electronic cam data creation button 53, an electronic cam data creation software storage unit 54, and an electronic cam table storage unit 55 are provided.

The central processing unit 45 is a processing unit that controls signal processing and the like of the entire control unit 27, and performs a well-known multiprocessing process, that is, a multiplex process. Here, the multiple processing refers to storing a plurality of programs and executing the programs while switching them in a short time so that the plurality of programs are apparently processed simultaneously. In this case, priorities are assigned to the programs to be time-division-processed and each program is executed, and the task process is executed while switching the processes in the descending order of priority.
The pulse signal generation circuit 46 is connected to the pulse encoder 30 and is also connected to the central processing unit 45. The pulse signal generation circuit 46 receives the rotation detection signal output from the pulse encoder 30 through an interface or the like, generates a pulse signal for each predetermined rotation angle based on the rotation detection signal, and outputs the pulse signal to the central processing unit. Output to 45. In this embodiment, the pulse signal generation circuit 46 outputs a predetermined number of pulse signals at equal intervals in synchronization with the spindle rotating motor 22 while the spindle rotating motor 22 makes one rotation. .

  The clock signal generation circuit 47 receives a predetermined command signal output from the central processing unit 45, generates a clock signal having a predetermined period, and outputs the clock signal to the division timing signal generation circuit 48. The division timing signal generation circuit 48 counts the number of generations of the clock signal output from the clock signal generation circuit 47, generates a division timing signal based on the count result, and outputs it to the central processing unit 45.

  The RAM 49 is configured to temporarily store the results of various calculations in the central processing unit 45 so as to be readable. The RAM 49 stores various data for causing the machine tool to perform an actual machining operation.

  The ROM 50 is a storage unit that stores various processing programs. The ROM 50 includes, for example, a calculation program for determining the movement position of the workpiece and the movement position of the tool at predetermined time intervals when performing thread cutting, and a spindle for performing drilling or cutting. A calculation program and the like for determining the movement positions of the workpiece, the tool, and the drilling tool for each predetermined rotation angle of the rotation motor 22 are stored.

  The modal information storage unit 51 is a storage unit that stores modal information when the machine is operating, temporarily stores the modal information commanded when the machine tool is operating, and also stores initial values of the modal information as nonvolatile information. ing. The modal information stored in the modal information storage unit 51 includes a part of preparation command (G code), a part of auxiliary machine command (M code), a selected tool number, a tool attachment position correction amount, and a tool wear correction. Quantity, coordinate system, axis feed mode, axis feed speed, selection plane, main spindle number, etc.

The NC program storage unit 52 is a storage unit that stores an NC program created by a user of a machine tool. Further, when a part of the NC program created by the user is converted into electronic cam data, the NC program of the part that is not converted into electronic cam data is stored.
The electronic cam data creation button 53 is operated to start electronic cam data creation software when creating an electronic cam table based on an NC program created by a user of a machine tool. The electronic cam creation software activated by operating the electronic cam data creation button 53 is electronic cam conversion software stored as non-volatile information in the electronic cam data creation software storage unit 54.

  The electronic cam table stored in the electronic cam table storage unit 55 is for performing so-called electronic cam control, and is created by converting an NC program created by a user of a machine tool using electronic cam creation software. The This electronic cam control is the rotation position data by the pulse signal output from the pulse encoder attached to the reference shaft such as the main shaft, and the command position data of the moving axis respectively set corresponding to this rotation position data. From the above, movement command data for the movement axis is generated every moment. Then, from this movement command data and rotation position data, command speed data of the movement axis synchronized with the rotation speed of the reference axis is generated, and the position of the tool is controlled based on the command speed data and the movement command data. I am doing so. As a reference axis, a virtual reference axis can be created using the output of the clock signal.

  Here, an example of an electronic cam table created by the electronic cam creation software will be described with reference to FIG. The electronic cam table 60 includes an X-axis table 61 that represents the movement position of the movement axis in the X-axis direction, a Y-axis table 62 that represents the movement position of the movement axis in the Y-axis direction, and movement according to the count value of the reference timing signal. A Z-axis table 63 indicating the movement position of the shaft in the Z-axis direction, a spindle table 64 for instructing the rotation speed of the spindle, an auxiliary machine table 65 for instructing auxiliary machine operation, and a modal information table 66 for instructing update of modal information are provided. It has been. In the example of FIG. 2, the count value of the reference timing signal is described as a numerical value following the symbol A, and a symbol or a numerical value indicating a moving position or an operation is continuously described at a position slightly apart on the right side.

  An example of data described in the modal information table 66 is shown in FIG. In this example, 200 representing the selected tool number is written immediately to the right of the symbol P representing modal information. On the right side, 1 represents the tool wear correction amount, 01 represents the G code to be held as modal information, 96 represents the moving mode of the moving axis, 0.05 represents the moving speed of the moving axis, and is held as modal information. 03 representing power M code, 4000 representing the number of rotations of the main shaft, 01 representing the number of the main main shaft, 120 representing the coordinate system, and 17 representing the selection plane are separated by a comma (,).

  FIG. 4 shows an operation example of the machine tool configured as described above. In section A from the start of operation to the time of operation switching by electronic cam control, operation by NC control is performed. In this section A, as in normal NC control, commands are sequentially read from the NC program for each block, and modal information necessary for the NC commands is added to determine and execute the operation. When there is a command to specify the change of modal information in the block, the data in the modal information storage unit 51 is rewritten each time.

  If the read NC command is a command for specifying switching to electronic cam control, switching to electronic cam control is executed, and the machine tool is controlled by electronic cam control (section B). FIG. 5 shows a flowchart of the operation by this electronic cam control. In the electronic cam control, first, the modal information storage unit 51 is invalidated so that only writing is possible, and a fixed parameter dedicated to the electronic cam control provided in the ROM 50 is set as modal information (S1). This fixed parameter is a basic parameter such as a coordinate system necessary for electronic cam control. In the electronic cam control, the modal information stored in the modal information storage unit 51 is not used, and the control is performed using the fixed parameter. Then, counting of the reference timing signal created based on the pulse signal output from the pulse encoder attached to the reference axis is started (S2). For example, when the main axis is the reference axis, the central processing unit 45 generates and counts the reference timing signal based on the output pulse signal of the pulse encoder 30.

  When the counting is started, the count value of the reference timing signal described in the electronic cam table 60 and the movement axis position tables 61, 62, 63, the spindle table 64, and the auxiliary machine table 65 at the count value are read (S3). ) When the count value is reached, the movement axis is controlled so that the movement axis reaches the position corresponding to the count value (S4). Alternatively, if there is a description in the spindle table 64 or the auxiliary machine table 65 corresponding to the reached count value, the spindle rotational speed change or auxiliary machine operation is started when the count value is reached (S4). In parallel with these operations, the electronic cam table 60 is referenced to determine whether modal information needs to be set. That is, it is determined whether there is a description in the modal information table 66 of the electronic cam table 60 corresponding to the reached count value (S5). If there is a description, the information in the modal information storage unit 51 is updated (S6). When there is no description in the modal information table 66 or after the information is updated in S6, it is determined whether or not the next count value is described in the electronic cam table 60 (S7). When the next count value is described, the process returns to S3. When the next count value is not described, the operation of the machine tool by the electronic cam control is terminated. Therefore, when the operation of S4 is completed, the counting of the reference timing signal is terminated ( S8).

  After the electronic cam control is completed, the operation by NC control is resumed. First, the invalidated modal information storage unit 51 is validated to enable reading and writing (S9). After that, as in normal NC control, commands are sequentially read from the NC program described in section C of FIG. 4 for each block, and the modal information necessary for the NC commands is added to confirm and execute the operation (S10). -Section C).

  Also in the section C, when the read NC command is a command designating the switching to the electronic cam control, the switching to the electronic cam control is executed, and the machine tool is controlled by the electronic cam control similarly to the section B. (Section D) When the electronic cam control is completed, the control is switched to NC control to operate (Section E). If the NC command for ending the operation is described in the NC program of the section E, the series of operations of the machine tool is ended.

  In this operation example, the modal information table 66 is provided in the electronic cam table 60, and the modal information stored in the modal information storage unit 51 is sequentially updated according to the operation of the machine tool during the electronic cam operation. Even when switching from NC to NC control, modal information corresponding to the switching point can be taken over by NC control. For example, since the operation of the electronic cam control is determined before the machine tool is operated, control in which the operation is changed during operation cannot be executed depending on conditions such as changing the machining shape according to the number of machining. Although it is conceivable to perform the condition determination and the operation after the condition determination by NC control, since the modal information is not updated during the electronic cam operation even when switching from the electronic cam control to the NC control in the past, Control using modal information could not be executed. Therefore, in such a case, the electronic cam control is not performed and the operation is performed only by the NC control. According to the present embodiment, since it is possible to switch between electronic cam control and NC control even in such a case, all parts other than control that can be executed only by NC control can be controlled by the electronic cam. It becomes possible. Even if the machine is stopped during the electronic cam control, the modal information at that time is stored, so that even if the NC control is performed after the stop, the NC control is performed based on the wrong modal information. There is nothing.

  Next, a configuration example of a machine tool in another embodiment is shown in FIG. The same components as those of the previous embodiment are denoted by the same reference numerals and description thereof is omitted. The difference in configuration from the previous embodiment is that a modal information storage unit 70 is provided during electronic cam operation. The modal information storage unit 70 during the electronic cam operation temporarily stores modal information when the machine tool is operated by the electronic cam control.

  FIG. 7 shows an operation example of the machine tool in another embodiment. In the section a from the start of operation to operation switching by electronic cam control, operation by NC control is performed. In section a, as in normal NC control, commands are sequentially read from the NC program for each block, and modal information necessary for the NC commands is added to determine and execute the operation. When there is a command to specify the change of modal information in the block, the data in the modal information storage unit 51 is rewritten each time. During this NC control, the modal information storage unit 70 during the electronic cam operation is not used.

  If the read NC command is a command for specifying switching to electronic cam control, switching to electronic cam control is executed, and the machine tool is controlled by electronic cam control (section b). FIG. 8 shows a flowchart of the operation by this electronic cam control. In the electronic cam control, first, the modal information stored in the modal information storage unit 51 is transferred to the modal information storage unit 70 during the electronic cam operation (S21). Then, a fixed parameter dedicated to electronic cam control provided in advance in the ROM 50 is transferred to the modal information storage unit 51 (S22). This fixed parameter is a basic parameter such as a coordinate system necessary for electronic cam control. In the electronic cam control, the fixed parameter transferred to the modal information storage unit 51 is used for control.

  Then, counting of the reference timing signal created based on the pulse signal output from the pulse encoder attached to the reference axis is started (S23). For example, when the main axis is the reference axis, the central processing unit 45 generates and counts the reference timing signal based on the output pulse signal of the pulse encoder 30.

  When the counting is started, the count value of the reference timing signal described in the electronic cam table 60 and the movement axis position tables 61, 62, 63, the spindle table 64, and the auxiliary machine table 65 at the count value are read (S24). ) When the count value is reached, the movement axis is controlled so that the movement axis reaches the position corresponding to the count value (S25). Alternatively, if there is a description in the spindle table 64 or the auxiliary machine table 65 corresponding to the reached count value, the change of the spindle rotational speed or the auxiliary machine operation is started when the count value is reached (S25). In parallel with these operations, the electronic cam table 60 is referenced to determine whether modal information needs to be set. That is, it is determined whether there is a description in the modal information table 66 of the electronic cam table 60 corresponding to the reached count value (S26). If there is a description, the information in the modal information storage unit 70 during the electronic cam operation is updated (S27). At this time, the modal information storage unit 51 maintains the fixed parameters as they are. If there is no description in the modal information table 66 or after the information is updated in S27, it is determined whether or not the next count value is described in the electronic cam table 60 (S28). When the next count value is described, the process returns to S24. When the next count value is not described, the operation of the machine tool by the electronic cam control is ended. Therefore, when the operation of S25 is completed, the counting of the reference timing signal is ended (S29). ).

  After the electronic cam control is completed, the operation by NC control is resumed. First, the modal information stored in the modal information storage unit 70 during the electronic cam operation is transferred to the modal information storage unit 51 (S30). Thereafter, as in normal NC control, commands are sequentially read out from the NC program described in section c of FIG. 7 for each block, and the modal information necessary for the NC commands is added to confirm and execute the operation (S31). -Section c).

  Also in the section c, when the read NC command is a command designating switching to the electronic cam control, switching to the electronic cam control is executed, and the machine tool is controlled by the electronic cam control similarly to the section b. (Section d) When the electronic cam control is completed, the control is switched to the NC control (Section e). If the NC command for ending the operation is described in the NC program of the section e, the series of operations of the machine tool is ended.

  Also in the operation in this other embodiment, a modal information table 66 is provided in the electronic cam table 60, and the modal information stored in the modal information storage unit 70 during the electronic cam operation is stored in accordance with the operation of the machine tool during the electronic cam operation. Since it is sequentially updated and transferred to the modal information storage unit 51 when switching to the NC control, even when the electronic cam control is switched to the NC control, the modal information corresponding to the switching point can be transferred to the NC control. It becomes possible. In this example, since the storage unit used when determining the operation of the machine tool is always the modal information storage unit 51, it is not necessary to switch the storage unit.

  In the above two embodiments, the modal information table 66 of the electronic cam table 60 is composed of one. However, for example, it is possible to make separate tables for each modal information, for example, only the tool number is one table. It is. Further, as a description method of the modal information table, a plurality of pieces of modal information may be described collectively as shown in FIG. 9, for example, without separating each modal information with a comma.

  Further, during the electronic cam control, the modal information stored at the time of the operation may be displayed on the display of the machine tool. In this case, the information stored in the modal information storage unit 51 may be displayed in the previous embodiment, and the information stored in the modal information storage unit 70 during the electronic cam operation may be displayed in the other embodiments. If the NC command corresponding to the operation in the electronic cam control is displayed on the display together with the modal information, the display shows which part of the NC program is executed by the user and controlled by the electronic cam. I can confirm.

1 is a block diagram of an embodiment of a machine tool to which a numerical control device and a control method of the present invention are applied. It is one Example of the electronic cam table to which the numerical control apparatus and control method of this invention are applied. It is one Example of the data described in the modal information table of this invention. It is the operation | movement figure which showed the operation example of the numerical control apparatus and control method of this invention. It is the flowchart which showed one example of operation | movement of the numerical control apparatus and control method of this invention. It is a block diagram of the other Example of the machine tool to which the numerical control apparatus and control method of this invention are applied. It is the operation | movement figure which showed the other operation example of the numerical control apparatus and control method of this invention. It is the flowchart which showed the other operation example of the numerical control apparatus and control method of this invention. It is another Example of the data described in the modal information table of this invention.

Explanation of symbols

27 Control unit 51 Modal information storage 52 NC program storage 55 Electronic cam table storage 60 Electronic cam table 66 Modal information table 70 Modal information storage

Claims (3)

In a numerical control device of a machine tool for moving either the workpiece or a tool for machining the workpiece to machine the workpiece into a desired shape,
An NC controller that interprets the NC program and operates the machine tool;
An electronic cam control unit that operates a machine tool using an electronic cam table that defines a movement position of the workpiece or the tool with reference to an operation amount on a predetermined reference axis;
An operation switching unit for switching between operation by the NC control unit and operation by the electronic cam control unit;
A modal information update unit that updates modal information during operation by the electronic cam control unit,
The NC control unit interprets the NC program by taking over the modal information stored in the modal information storage unit when the operation switching unit switches from the operation by the electronic cam control unit to the operation by the NC control unit. A numerical control device. A modal information table in which the modal information is described with reference to the amount of motion in the predetermined reference axis;
The modal information update unit updates the modal information in the modal information storage unit to information described in the modal information table when the operation amount on the predetermined reference axis reaches the operation amount described in the modal information table. The numerical control apparatus according to claim 1, wherein: Electronic cam control for operating a machine tool using an electronic cam table in which a workpiece or the movement position of the tool is determined with reference to an operation amount on a predetermined reference axis, and operating the machine tool by interpreting an NC program In a machine tool control method for controlling a machine tool by switching between NC control,
Update the modal information according to the amount of movement in the predetermined reference axis during operation by the electronic cam control,
A machine tool control method, wherein modal information updated when switching from the electronic cam control to the NC control is taken over by NC control.

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