JPS6354606A - Numerical controller - Google Patents

Abstract

PURPOSE:To efficiently execute a numerical control for plural machines by constituting the titled device so that the whole device constructs plural control processing systems, and each system executes independently a control operation of a controlled system by an independent control program, and also, a synchronization driving control by a synchronization sending pulse encoder means is also executed independently. CONSTITUTION:An interface part 46 for pulse encoder which has been connected to a control part 12 is constituted of interfaces 46A-46C for pulse encoder which can input and output a pulse independently, respectively. To these interfaces 46A-46C for pulse encoder, pulse encoders 48A-48C which can generate independently a synchronization sending pulse are connected. A storage part 20 which has been connected to the control part 12 has program areas 20A-20C, and in these program areas, a control program which can be operated independently is stored, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a numerical control device, and particularly to a numerical control device that controls a plurality of controlled axes.

[Conventional technology] Numerical control, which commands the position of a tool relative to a workpiece using numerical information, has advantages such as improved productivity, labor savings, and thorough management, so it is widely used in various machine tools. ing.

FIG. 2 shows an example of a conventional numerical control device. In this figure, the control unit (50) includes a central processing unit (hereinafter referred to as rcPUJ) (52),
Also, a data input/output section (54), a signal input/output section (56)
and a pulse encoder interface (66) are connected respectively. This pulse encoder interface (66) has a synchronous feed pulse encoder (68).
) are connected.

The control unit (50) further includes a calculation unit (58) and a storage unit (
60) and a drive section (62) are connected to each other, and a servo motor group (64) is connected to the drive section (62).

Of these, the data person output unit (54) is for inputting and outputting processed data with an external data person output device (not shown), and the signal person output unit (56) is for starting,
This is for human output of control data such as stopping. Further, the pulse encoder (68) is provided, for example, on the main shaft, and is used to synchronously drive the controlled object as necessary. For example, in machining such as thread cutting, it is necessary to set the pitch of how many millimeters the drill will move per spindle rotation, but in such cases, synchronous drive using the synchronous feed pulse encoder (68) is necessary. will be held.

Next, the storage section (60) is provided with a data area (60)A and a program area (60)B.

The processed data input from the data output unit (54) is
It is stored in the data area (60) A, and the signal person output section (5
The control data input from 6) is stored in the program area (
[io)” is stored in B.

Next, the calculation unit (58) performs calculations necessary for controlling the servo motor group (64). For example, when a drive command is given at a vector speed, a predetermined calculation is performed from the decomposition speed in the coordinate axis direction. Arithmetic processing such as interpolation to obtain the hexagonal distance of time is performed.

Next, the drive unit (62) has a servo motor group (64) that
Corresponding to the fact that it is composed of three servo motors: servo motor (64) A, servo motor (64) B, and servo motor (84) C, three drive circuits (62)
)A, (62)B, and (62)C.

Incidentally, the servo motor group (64) actually corresponds to the servo motors of the three-axis driving portion of machine tools such as lathes and poles.

Next, the operation of the above device will be explained. Data necessary for performing processing control is input from an external device through a data output section (54) and a signal input/output section (56).

These data are stored in the storage unit (6) by the control unit (50).
0) data area (60)A, program area (5)
0) respectively stored in B.

Next, the control unit (50) controls the program area storage unit (8).
0) Based on the programs and data stored in the B IC2'r, the calculation unit (58) performs calculations such as the interpolation described above from the data stored in the data area storage unit (60)A, and then the drive unit (62) Issues necessary drive commands.

At this time, the pulse encoder interface (66)
The pulse is $1 from the pulse encoder (68) via
When input to the control section (50), the same 11 of the corresponding control axis
Yuefu Eriwei] Ichigoguchi is held.

As a result, the servo motor group (64) is driven, and the required machining is executed according to the input data.

As described above, the servo motor (64) A, servo motor (14) B, and servo motor (64) C of the servo motor group (64) are not driven independently but are driven as a whole. It is driven by

[Problems to be Solved by the Invention] By the way, in the conventional numerical control device as described above, the whole operates according to a control program stored in the program area (60) B of the storage section (60), and the drive Part (6
2) The servo motor (64) A, servo motor (64) B, and servo motor (64) C connected to the motor cannot be driven independently.

For example, servo motor (64) A is used to rotate a ball drill, servo motor (64) B, servo motor (
64) It is not possible to use C in a lathe.

Therefore, it is necessary to provide a numerical control device as shown in FIG. 2 for each component. Therefore, when numerically controlling a large number of mechanical components, a large amount of equipment is required, which is disadvantageous in terms of cost.

The present invention has been made in view of the above, and an object of the present invention is to provide a numerical control device that can efficiently numerically control a plurality of machines and is advantageous in terms of cost. be.

[Means for Solving the Problems] The present invention configures the information output section, the synchronous feeding pulse encoder means, and the drive section into a plurality of independently operable systems, and these systems A system control means is used to divide a plurality of independently executable control programs into a plurality of arbitrary groups, and perform independent control and synchronous drive processing for each group. It is.

[Function] According to the present invention, the entire electrical manufacturing system constructs a plurality of control processing systems, each system independently performs a control operation of a controlled object according to an independent control program, and also includes a pulse encoder means for synchronous feeding. Synchronous drive control is also executed independently.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a numerical control device according to the present invention. In this figure, a control unit (12) including a CPU (10) first has a data input/output unit (14).
) or connected. This data person output section (14) is
It corresponds to the data person output unit (54) in FIG. 2 and exchanges processed data with an external data person output device (not shown).

Next, a signal input/output device (16) is connected to the control section (12). This signal input/output device (16) is composed of signal input/output sections (16)A, (16)B, and (16)C, each of which is capable of independently inputting and outputting control data. That is, the signal input/output section (16) A,
(15) B and (16) C each have the same function as the signal person output section (56) in FIG.

Further, a pulse encoder interface section (4G) for synchronous feeding is connected to the control section (12). This pulse encoder interface section (46) is composed of pulse encoder interfaces (45)A, (4B)B, and (46)C, each of which is capable of inputting and outputting pulses independently. That is, the pulse encoder interfaces (46) A, (46) B, (4
6) Each C has a similar function to the pulse encoder interface (66) in FIG. And these pulse encoder interfaces (46) A, (
46)B and (46)C each have a pulse encoder (48)A that can independently generate pulses for synchronous feeding.
(48)B and (48)C are connected to each other.

Next, a calculation section (18) is connected to the control section (12). This calculation unit (18) performs interpolation and other calculations as described above.

Next, a storage section (20) is connected to the control section (12). This storage section (20) has a program area (20).
0) A, (20) B, and (20) C. These program areas (20)A, (20)B,
(20) C stores control programs that can each operate independently. That is, the programs stored in program areas (20)A, (20)B, and (20)C each have the same functions as the programs stored in program area (60)B in FIG. However, each can be executed independently.

Furthermore, the storage unit (20) is provided with a data area (201D). This data area (20)D is
The data area in the figure (similar to δOVA, is for storing sword 0 data, but in addition, system control means is programmed and stored.

Next, the control section (12) includes drive sections (22) and (24).
, (26) are connected to each other. These drive parts (2
2), (24), and (26) can each operate independently, and each has the same function as the drive unit (62) in FIG. However, only the negative axis can be controlled.

Next, servo motors (28), (30), and (32) are connected to the drive units (22), (24), and (26), respectively.

These servo motors (28), (30), and (32) are not necessarily of the same machine, but may be of machines of a subcommittee or higher, and can operate independently fat.

Next, the system control means stored in the data area (20)D mentioned above will be explained. The implementation of this measure is
This is performed by the control unit (12).

As shown in FIG. 3, first, a data person output section (14),
and signal input/output devices! Referring to the data input from (16) and the control program stored in program area (20)A or 20)C, it is determined which control program is to be operated (step SA , SB, SC).

Next, the correspondence between the program to be operated and the signal output section (18) A to 16) C through which control data used therein is input/output is determined (see step SD). Next, the correspondence between the program to be operated and the pulse encoder (48)A to 48)C in which pulse generation is performed is determined (see step SE). Furthermore, the program and the drive unit (22) to 26 to be operated.
) (see step SF).

In this way, the system control means selects the signal person output section (16) A or 16) according to the content of the required control operation.
C, Program area (20) A or 20) C
1"Ib It has the function of organizing and grouping moving parts (22) to 26) and pulse encoders (48) A to 48) C.

Next, the overall operation of the above embodiment will be explained by taking various cases as examples.

First, while referring to Fig. 4, -axis machine (34), (
36) and (38) are each controlled independently. In addition, in the signal input/output part (16) A, the control data D (34) of the machine (34) is input/output, and in the signal input/output part (16) B, the control data D (3B) of the machine (36) is input/output. Signal input/output section (16) C
Now, it is assumed that control data D (38) of machine M (38) is output manually.

In addition, in the pulse encoder (48) A, the machine (34)
B generates pulses for synchronous feeding of the machine (36), and pulse encoder (48) generates pulses for synchronous feeding of the machine (36).
In C, it is assumed that pulse generation for synchronous feeding to the machine (38) is performed.

And program area (20) A or 20)
It is assumed that control programs for the machines (34) to 38) are stored in C.

In this case, the system control means of the data area (20) D described above controls the signal person output section (16) A, the program area (20) A, and the pulse encoder C48) A.
and a drive section (22) are systematized, and a signal person output section (
161B, program area (20) B, pulse encoder (48) B, and drive section (24) are organized, and signal output section (16) C, program area (20) C, and pulse encoder (48) C and the drive section (26) are organized.

The servo motor (28) or 32) receives control data input from the signal person output section (16) A or 16)C, respectively, and the program area (20)A or 20).
Each of them is independently controlled based on a control program stored in C. That is, starting operations, stopping operations, etc. are performed independently. At this time, the control unit (12) performs so-called task control.

Also, pulse encoder (48) A or 48)
The pulses generated from C are input to the control unit (12) via the pulse encoder interfaces (45)A or 46)C, and synchronous feed drive control is executed independently for each system. .

As described above, in this example, the entire device functions as three independent numerical control devices.

Next, with reference to FIG. 5, a case will be described in which a machine (40) having two servo motors and a machine (42) having one servo motor are each independently controlled.

In FIG. 5, the signal person output section (16) A is connected to the machine (
It is assumed that the control data D (40) is input/output to/from the machine (40), and the signal input/output section (16)C outputs the control data D (=I2) to the machine (42).

In addition, in the pulse encoder (48) C, the machine (40)
Pulse generation is performed for pulse en: l-ta (4
8) At A, pulse generation for the machine (42) shall be performed.

Furthermore, the program area (20) B has a machine (40
) is stored in the program area (20)C, and a control program to be operated in the machine tA (42) is stored in the program area (20)C.

In this case, the system control means in the data area (20)D controls the signal input/output section (1B) as shown in FIG.
A, program area (20) B, pulse encoder (48) C1 drive section (22) and (24) are organized, signal person output section (16) C, program area (20) C, pulse encoder (48) A. The drive unit (26) is organized.

The machine (40) is controlled by a control program stored in program area (20)B, and the machine (42) is controlled by a control program stored in program area (20)C. Note that since two servo motors are the objects of control of the machine (40), interpolation calculations are performed in the calculation unit (18).

As described above, in this example, the entire system operates as two independent numerical control devices.

Next, with reference to FIG. 6, still another operational aspect of this embodiment will be described.

The figure shows an example in which the machine (44) has three servo motors. In this case, the signal person output section (1B) where the human output of control data D (44) is performed.
B, a program area (20) A in which the control program is stored, a pulse encoder (48) B that generates pulses for the a91c (44), and a drive unit (
22) to 26) are systematized. In this example,
A single system of control similar to that of the device shown in FIG. 2 is performed.

Note that the present invention is not limited to the above embodiments in any way. For example, in the above three embodiments, a maximum of three independent systems may be constructed, two systems, or more systems may be constructed.

[Effects of the Invention] As explained above, according to the present invention, various independent control systems are constructed using the system control means, so that a plurality of m71k can be efficiently numerically controlled, and the cost can be reduced. It also has the effect of being advantageous.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram showing one embodiment of the present invention, and FIG.
The figure is a circuit block diagram showing a conventional numerical control device, FIG. 3 is an explanatory diagram explaining the functions of the system control means, and FIGS. 4 to 6 are explanatory diagrams showing the operation mode of the embodiment of FIG. 1. be. In the figure, (12) is a control unit, (16) is a signal input/output device, (I8) is a calculation unit, (20) is a storage unit, (20)
A. (20) B, (20) C are program areas, (22). (24), (26) are drive parts, (28), (3
0) and (32) are servo motors, (4B) is a pulse encoder interface section, and (4B) is a pulse encoder group. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) Based on the information input from the information input/output unit and the control program stored in the storage unit, the calculation unit performs necessary calculations and the control processing unit issues necessary control commands to the controlled object, In a numerical control device that performs synchronous drive control of a necessary control object using a synchronous feed pulse encoder means, the information input/output section includes a plurality of systems capable of independently inputting and outputting information, and the driving section includes: , comprising a plurality of systems capable of independently driving a controlled object, the synchronous feeding pulse encoder means comprising a plurality of systems capable of independently generating pulses for synchronous drive control, and the storage section is provided with a plurality of control programs, each of which is independently executable, and each system of the information input/output section, the drive section, and the synchronous feeding pulse encoder means is configured to correspond to any one of the plurality of control programs. A numerical control device comprising system control means for arbitrarily grouping systems, wherein the control processing section independently controls each grouped system. (2) The numerical control device according to claim 1, wherein the calculation unit performs an interpolation calculation between control objects within a group.