JPH07241742A - Numerical control device - Google Patents

Abstract

PURPOSE:To facilitate manual position indexing operation in a numerical control device allowing a tool position to be moved manually. CONSTITUTION:A space parameter storage means 1 is stored with plural space parameters 2 indicating grate space on the specified coordinate axes. A grate space selecting means 3 selects one of the space parameters 2 and assigns a grate position. A movement command means 5 outputs a pulse signal and a moving direction command. A coordinate system selecting means 7 selects a coordinate system to be the reference of the coordinate axes. A moving quantity computing means 4 computes the moving distance to a following grate position in the direction assigned by the moving direction command every time it receives one pulse signal. An interpolating means 6 outputs interpolating pulse according to the moving distance. A tool can be thereby moved into a set grate position when the pulse signal is outputted. Since the grate space can be set optionally, position indexing operation is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical controller capable of manually moving the position of a tool,
In particular, it relates to a numerical control device with improved position indexing operation.

[0002]

2. Description of the Related Art In a numerical controller, the position can be determined by manually moving a tool. Usually, a manual handle (manual pulse generator) or a manual step feed switch is provided for this movement. When the handle is moved by the manual handle, each time the handle is moved by one scale, the tool moves by a distance corresponding to the value of the preset unit movement amount. When moving with the manual step feed switch,
Each time the manual step feed switch is pressed, the tool moves by the distance corresponding to the preset unit movement amount.

FIG. 6 is a diagram showing movement of a tool for a manual position indexing operation according to a conventional method. This figure is a movement on the X axis of the absolute coordinate system. Coordinate values are in "mm" units. C10 is the origin of the coordinate system (coordinate value "0"), and the current position C11 (coordinate value "3.597") to the target position C14.
This is a case of moving to (coordinate value “11.000”). Then, it is assumed that this movement is performed by a manual handle.

First, the operator sets the unit movement amount to 1.000 mm by the unit movement amount setting switch, and moves the manual handle by 7 increments in the plus direction. by this,
The tool position moves to C12 (coordinate value "10.597").

Next, the unit movement amount is set to 0.100 mm, and the manual handle is moved by 4 graduations in the plus direction. As a result, the tool position is C13 (coordinate value "10.997")
Move to.

Finally, the unit movement amount is set to 0.001 mm, and the manual handle is moved in the plus direction by three scales. As a result, the tool position is the target position C14 (coordinate value "11.
000 ").

As described above, in the conventional numerical control device, the amount of movement of the tool is designated by an increase / decrease value from the current position, and the operator moves the manual handle while making the current position closer to the target position. Then, the unit movement amount is changed from a large value to a small value, and the manual handle is moved again while constantly checking the current position to bring it closer to the target position. By repeating this, the tool can be moved to the target position.

[0008]

However, since the movement amount of the tool can be specified only by the increase / decrease value from the current position, the coordinate value of the target position is known, but the target position is confirmed while confirming the current tool position. I have to move it little by little. Therefore, the operator must repeat the same operation after confirming the current position, grasping the distance between the current position and the target position, selecting the unit movement amount, and further moving the tool by the manual handle, The burden on workers is increasing.

Further, as shown in FIG. 6, when the target position is a coordinate value (“11.000” in the figure) which is well separated, or when the target position is moved to the origin (coordinate value “0.000”). Even if there is, it is necessary to gradually approach the target position while changing the manual handle and the unit movement amount setting switch as described above, resulting in poor work efficiency.

As described above, since the movement amount of the tool can be specified only by the increase / decrease value from the current position, there is a problem that the work load is heavy and the work efficiency is poor. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a numerical control device capable of easily performing a manual position indexing operation.

[0011]

In a numerical control device capable of manually moving the position of a tool,
Interval parameter storage means for storing a plurality of interval parameters indicating the interval between grids on a predetermined coordinate axis, grid interval selection means for selecting one of the plurality of interval parameters and designating a grid position, and a pulse signal , A movement command means for outputting a movement direction command, a movement amount calculation means for calculating a movement distance to the next grid position of the movement direction command each time the pulse signal is received, and an interpolation pulse by the movement distance. There is provided an interpolating means for outputting, and a numerical control device is provided.

[0012]

The spacing parameter storage means stores a plurality of spacing parameters indicating the spacing between grids on a predetermined coordinate axis. The lattice spacing selecting means selects one of the spacing parameters stored in the spacing parameter storage means and specifies the lattice position. The movement command means outputs a pulse signal and a movement direction command. The movement amount calculation means calculates the movement distance to the next grid position in the direction designated by the movement direction command each time one pulse signal is received. The interpolation means outputs an interpolation pulse according to the moving distance.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the principle of the present invention. The interval parameter storage means 1 stores a plurality of interval parameters 2. The spacing parameter 2 indicates the spacing between grids on a predetermined coordinate axis. Then, the lattice spacing selecting means 3
Specifies the grid position by selecting one of the interval parameters 2 stored in the interval parameter storage means 1. This grid position is the position where the tool can be stopped, and at the interval specified by the interval parameter 2,
It is set on the coordinate axis. For example, when the selected spacing parameter 2 is set to "0.100 mm", points (0 mm, 0.1 m) every 0.1 mm from the origin of the coordinate axis.
m, 0.2 mm, 0.3 mm ...) is the lattice position.

The movement command means 5 outputs a pulse signal and a movement direction instruction designating a movement direction by a manual operation. The movement command means 5 can use a manual handle or a manual feed switch.

The coordinate system selecting means 7 selects a coordinate system serving as a reference for coordinate axes along which the tool moves. The coordinate system includes an absolute coordinate system, a machine coordinate system, and a relative coordinate system. The absolute coordinate system is a coordinate system based on one point on the work, the machine coordinate system is a coordinate system based on the machine origin, and the relative coordinate system is a relative position between the tool position and the work. It is a coordinate system. These coordinate systems can be specified by parameters. For example, if the parameter value is 0, the machine coordinate system,
When the parameter value is 1, the absolute coordinate system is selected, and when the parameter value is 2, the relative coordinate system is selected.

The movement amount calculating means 4 recognizes the grid position, and calculates the movement distance to the next grid position in the direction designated by the movement direction command each time one pulse signal is received.

The interpolation means 6 outputs an interpolation pulse to the axis control circuit 18 according to the movement distance calculated by the movement amount calculation means 4. When the axis control circuit 18 receives the interpolation pulse, it outputs an axis movement command to the servo amplifier 19. The servo amplifier 19 receives the movement command and drives the servo motor 21.

For example, the current position is "0.050 mm" and the selected interval parameter 2 is "0.10".
When the pulse signal for 2 pulses is received in the plus direction when the setting is “0 mm”, the moving distance at the first pulse is “0.050 mm”, and the position moves to the position of “0.100 mm”. The moving distance at the pulse is "0.100m
m ”and moves to the position of“ 0.200 mm ”.

FIG. 2 is a hardware configuration diagram of a numerical controller for implementing the present invention. Processor 11 is RO
The entire numerical controller is controlled according to the system program stored in M12. This ROM12 is EPROM
Or EEPROM is used. SRAM in RAM13
And DRAM are used to store temporary data such as input / output signals. For the non-volatile memory 14, a memory backed up by a battery or a flash ROM is used. The non-volatile memory 14 stores parameters such as interval parameters and various data such as machining programs that should be retained even after power-off.

The graphic control circuit 15 converts the image information sent from the processor 11 or the like into a displayable signal and outputs it to the display device 16. The display device 16 is a CRT
And liquid crystal displays are used. The axis control circuit 18 receives an instruction such as an interpolation pulse from the processor 11 and outputs an axis movement instruction to the servo amplifier 19. The servo amplifier 19 receives the movement command and drives the servo motor 21 (shown in FIG. 1) in the machine tool 20.

A PMC (Programmable Machine Controller) 22 receives a T function signal (tool designation command) or the like via the bus 30 when executing a machining program. Then, this signal is processed by the sequence program, a signal is output as an operation command, and the machine tool 20 is controlled.
Machine control panel 4 for issuing tool movement commands to machine tools
0 is provided. Various switches are provided on the operation panel 40, and it is possible to select a spacing parameter and a coordinate system. Details of the machine operation panel 40 will be described later.

A software key 23 whose function is changed by a system program or the like is further connected to the bus 30. This software key 23 is used together with the display device 16 and the keyboard 17 in the CRT / MDI.
It is provided on the panel 25. The interval parameter 2 can be rewritten by inputting data from the keyboard 17.

FIG. 3 is a block diagram of an embodiment of the present invention. The nonvolatile memory 14 has four types of interval parameters 2.
It stores (P1, P2, P3, P4). The value of the interval parameter 2 can be changed by key input from the keyboard 17 (shown in FIG. 2). The spacing parameter 2 indicates the spacing between grids on a predetermined coordinate axis, and is 0.00
It is expressed in multiples of 1 mm. In the example of FIG.
P1 = 1, P2 = 10, P3 = 100, P4 = 1000
The value of is stored. Then, the grid position is designated by selecting one of the interval parameters 2 stored in the interval parameter storage means 1 with the grid interval selection switch 42 provided on the machine operation panel 40. That is, when P4 is selected, the lattice spacing is 1.000 mm, and the tool can be stopped at the position of 1.000 mm.

A manual handle 41a provided on the machine operation panel 40 outputs a pulse signal and a movement direction command designating a movement direction by a manual operation. Scales are arranged around the manual handle 41a at equal intervals.
Pulse signals are output by the number of scales when 1a is rotated. A movement direction command is output depending on the rotation direction when the manual handle 41a is rotated. When the manual handle 41a is rotated clockwise, the tool is moved in the plus direction of the coordinate axis, and when it is rotated counterclockwise, the tool is moved in the minus direction of the coordinate axis.

A coordinate system selection switch 43 is provided on the machine operation panel 40.
Is provided so that the coordinate system can be easily changed. The movement amount calculation means 4 recognizes the lattice position, and each time one pulse signal is received,
The moving distance to the next grid position in the direction designated by the moving direction command is calculated. This is a function executed by the processor 11 (shown in FIG. 2) calculating an instruction given by software.

The interpolation means 6 outputs an interpolation pulse to the axis control circuit 18 according to the movement distance calculated by the movement amount calculation means 4. When the axis control circuit 18 receives the interpolation pulse, it outputs an axis movement command to the servo amplifier 19. The servo amplifier 19 receives the movement command and drives the servo motor 21.

FIG. 4 is a view showing the machine operation panel 40. The machine operation panel 40 is provided with five switches in addition to the manual handle 41a. The manual handle 41a is connected to the manual pulse generator 41, and outputs one pulse signal each time the manual handle 41a is turned by one scale. Further, a movement direction command for movement in the plus direction or movement in the minus direction is output depending on the rotation direction of the manual handle 41a.

The feed means changeover switch 45 is a switch for switching between moving the tool according to the conventional increase / decrease value designation (A) or moving the tool according to the lattice spacing designation (B) of the present invention.

The unit movement amount setting switch 46 is effective when the feed means changeover switch 45 selects the increase / decrease value designation (A), and sets the movement amount when one pulse signal is output. Switch. In the figure, it is indicated by how many times the minimum movement amount (0.001 mm) is, and there are four types of unit movement amounts of 1, 10, 100, and 1000 times.

The lattice spacing selection switch 42 is enabled when the feeding means changeover switch 45 selects the lattice spacing designation (B), and the spacing parameter 2 (P1, P2, P).
Select and activate one of the options (3, P4).

The coordinate system selection switch 43 is a switch for selecting a coordinate system that serves as a reference for the coordinate axes along which the tool moves. In the figure, one of the machine coordinate system (0), the absolute coordinate system (1), and the relative coordinate system (2) can be selected.

The coordinate axis selection switch 44 determines which axis of the coordinate system selected by the coordinate system selection switch 43 (X axis,
This is a switch for selecting whether to move the tool in the Y-axis or Z-axis direction.

FIG. 5 shows the movement of the tool according to the invention. This figure shows movement on the coordinate axes of the absolute coordinate system. Coordinate values are in "mm" units. C0 is the origin of the coordinate system (coordinate value "0"), and the current position C1 (coordinate value "3.59"
7 ”) to the target position C3 (coordinate value“ 11.000 ”). As a premise, it is assumed that the feed means changeover switch 45 is set to the lattice spacing designation (B), the coordinate system selection switch 43 selects the absolute coordinate system (1), and the coordinate axis selection switch 44 selects the axis. To do.
Further, the value of the interval parameter is assumed to be the value shown in FIG.

First, the lattice spacing selection switch 42 is set to the position P4. At this time, since the value of P4 of the interval parameter 2 is 10000, the grid interval is 10.000 mm.
The distance is (10000 × 0.001 mm). And
Turn the manual handle 41a one scale clockwise (plus direction)
Rotate to. As a result, one pulse signal is output from the manual pulse generator 41.

The movement amount selection means 4 receives the pulse signal and calculates the movement amount. The next grid position in the plus direction of the current position C1 is the position with the coordinate value “10.000 mm”. Therefore, the movement amount to move with this pulse signal is
"6.403 mm" (10.000 mm-3.597 m
m). The interpolation means 6 outputs an interpolation pulse corresponding to this movement amount, whereby the tool is moved to the point C2 (coordinate position "1").
0.000 mm ").

Next, the lattice spacing selection switch 42 is set to the position P3. At this time, the value of P3 of the spacing parameter 2 is 1000, so the lattice spacing is 1.000 mm (1
000 × 0.001 mm) spacing. Then, the manual handle 41a is rotated clockwise by one scale (plus direction). As a result, one pulse signal is output from the manual pulse generator 41.

The movement amount selection means 4 receives the pulse signal again and calculates the movement amount. The next grid position in the plus direction of the current position C2 is the position with the coordinate value “11.000 mm”. Therefore, the movement amount to be moved by this pulse signal is "1.000 mm" (11.000 mm-10.0
00 mm). The interpolation means 6 outputs an interpolation pulse corresponding to this movement amount, whereby the tool moves to the target position C3 (coordinate position “11.000 mm”). In this way, the position can be determined very easily.

Further, even if the target position is a fine numerical value, it is easy to understand how much the pulse signal should be output with which interval parameter. For example, the current position is "3.597 mm" and the target position is "10.540".
If it is, one pulse is set at the grid spacing of “10.000 mm” and 5 pulses at the grid spacing of “0.100 mm”.
The tool can be moved to the target position by moving 4 pulses by setting the pulse and the grid interval to "0.010 mm". Thus, unlike the conventional case, the operator does not need to move the tool while checking the position of the tool.

Further, since the coordinate system as the reference of the coordinate axis can be selected by the coordinate system selecting means 7, the position can be determined by the coordinate system in which the position can be determined more easily according to the working situation. And since the interval parameter can be set to any value depending on the work content,
The work efficiency can be improved and the burden on the worker can be reduced.

Although a manual handle is used as the movement command means in the above description, manual step feed can also be used. Every time the manual step feed in the plus direction is executed, one pulse signal is output by the plus direction moving direction command. Similarly, each time a negative manual step feed is executed, one pulse signal is output in response to a negative movement direction command.

[0041]

As described above, in the present invention, the grid positions where the tool stops are set at equal intervals, and when the pulse signal is output from the movement command means, the tool is moved to the next grid position. , Furthermore, since the interval of the grid position can be set arbitrarily by using the interval parameter, the manual position indexing operation becomes easy,
It has become possible to improve work efficiency and reduce the burden on workers.

Further, since the coordinate system can be selected, it is possible to select a coordinate system that facilitates the work, and further improve the work efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing the principle of the present invention.

FIG. 2 is a hardware configuration diagram of a numerical controller for implementing the present invention.

FIG. 3 is a block diagram of an embodiment of the present invention.

FIG. 4 is a diagram showing a machine operation panel.

FIG. 5 is a diagram showing movement of a tool according to the present invention.

FIG. 6 is a diagram showing movement of a tool for manual position indexing operation according to a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Interval parameter storage means 2 Interval parameter 3 Lattice interval selection means 4 Movement amount calculation means 5 Movement command means 6 Interpolation means 7 Coordinate system selection means

Claims (4)

[Claims] 1. A numerical controller capable of moving a position of a tool by manual operation, and an interval parameter storage means for storing a plurality of interval parameters indicating intervals of a grid on a predetermined coordinate axis, and a plurality of the interval parameters. Selecting one of them, a grid spacing selecting means for designating a grid position, a moving command means for outputting a pulse signal and a moving direction command, and a moving direction command next to the moving direction command every time the pulse signal is received. A numerical control device comprising: a movement amount calculation means for calculating a movement distance to a grid position; and an interpolation means for outputting an interpolation pulse according to the movement distance. 2. The numerical controller according to claim 1, further comprising coordinate system selecting means for selecting a coordinate system serving as a reference of the coordinate axes. 3. The numerical controller according to claim 1, wherein the movement command means outputs the pulse signal and the movement direction command by a manual handle. 4. The numerical controller according to claim 1, wherein the movement command means outputs the pulse signal and the movement direction command by manual step feed.