JP3201822B2 - Numerical control unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical controller using a macro variable, which is used for a machine tool or the like.

[0002]

2. Description of the Related Art Conventionally, when a numerical controller having a macro function controls two axes of an X axis and a Z axis, for example, in order to register a numerical value in a macro variable # 500, the current values of the X axis and the Z axis are used. The coordinates indicating the position are X = 100.0 Z = 200.
If it is located at the position of 0, either the coordinate of the X axis or the coordinate of the Z axis is selected, and the teaching is performed to register the coordinate of the selected axis in the macro variable # 500.

For example, if the selected axis is the X axis, 100.0 which is the X axis coordinate is registered in the macro variable # 500.

After the coordinates are registered in each macro variable in this way, a program X (# 500) of an axis movement command using the macro variable is created and executed, and the X axis is set to 100.
It can be moved to the zero position.

[0005]

However, such a method is difficult when the operator selects the X-axis or the Z-axis, if the operator makes a mistake, for example, selects the Z-axis where the X-axis should be selected. When teaching is performed, not the coordinate 100.0 of the X axis but the coordinate 200.0 of the Z axis is registered in the macro variable # 500.

If the control target axis related to the macro variable is erroneously registered as described above, the numerical controller executes the axis movement command program X (# 500); However, there is a problem that it moves to the position of 200.0 and is very dangerous.

As described above, even if the axis using the macro variable is different from the command axis in the program, there is a problem that the axis moves as instructed by the program.

An object of the present invention is to provide a numerical controller capable of preventing dangerous operation of an axis control unit in consideration of such problems of a conventional numerical controller.

[0009]

SUMMARY OF THE INVENTION According to the present invention, in a numerical controller having a plurality of axis controllers, an axis attribute input for inputting, to a macro variable, an axis attribute for designating an axis to which the macro variable relates. Means, an axis attribute storage unit for storing the input axis attribute, a program unit for controlling the numerical controller, a program decoding unit for decoding the program, and axis movement by a predetermined macro variable obtained by the decoding. Axis attribute determining means for determining whether a command movement command axis and an axis attribute given to the macro variable match, and if the result of the axis attribute determining means matches, movement of the predetermined axis A shaft movement control unit for issuing a command and stopping execution of the shaft movement command if the result of the axis attribute determination unit does not match.

[0010]

According to the present invention, in a numerical control device having a plurality of axis control units and using macro variables, an axis attribute indicating an axis to which a predetermined macro variable is related is input by an axis attribute input means. The stored axis attributes are stored in the axis attribute storage unit.
The program for controlling the numerical control device stores a program for controlling the numerical control device. A program decoding section for decoding this program decodes the contents of the program and sends information on a movement command axis of an axis movement command of a predetermined macro variable to the judgment means.

The determination means compares the contents of the axis attribute storage section with the information on the movement command axis of the macro variable obtained by the program decoding section, and determines whether or not both axis attributes match. If the axis attributes match, a movement command for the matching axis is issued, and if both axis attributes do not match, execution of the axis movement command is stopped.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a numerical controller according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a numerical controller according to the present invention.

The memory 1 stores the coordinates of the current position of the X axis and the Z axis, and is used for teaching and the like. The axis attribute input means 2 comprises a key input unit 21 and an input display unit 22 for instructing an axis attribute which is the name of teaching or axis. The input buffer 3 temporarily stores data from the memory 1 and the input means 2.

The memory 4 stores macro variables and axis attributes, which are control data of axis coordinates, and the contents thereof can be updated by data from the input buffer 3. The contents stored in the memory 4 are as shown in FIG. That is, the values of the macro variables and the axis attribute codes of the axes corresponding to the macro variables are stored in the memory 4 as the macro variables as shown in FIG. For example, in the case of the X axis, the axis attribute stores the character "X" (58H in ASCII code). When there is no axis attribute, the number 0 is stored.

The memory 6 stores a program for controlling the numerical controller. The program decoding section 61 is means for decoding the contents of the program 6 and sending the result to the judgment means 7.

The judging means 7 judges whether or not the relationship between the macro variable of the program and the movement axis of the axis movement command matches with the relationship between the macro variable of the axis attribute storage unit 4 and the relationship of the axis attribute. It is a means to do. The X-axis motor control unit 8 and the Z-axis motor control unit 9 issue a rotation command to the X-axis motor 10 and the Z-axis motor 11, respectively, in accordance with the command of the judgment means 7, and move the X-axis or Z-axis. Or X
This is means for stopping the axis or Z axis.

The X-axis motor 10 and the Z-axis motor 11 are mechanically connected to the X-axis and Z-axis moving parts of the numerical controller.

Next, the operation of the above embodiment will be described with reference to the flowchart of FIG.

First, the axis attributes are input to the memory 4 in advance. For example, there is the following method. In FIG.
The first table shows a first input method, which is a teaching method. First, the name of the axis to be taught, for example, “X” is input by the input means 2. Next, by pressing both the teaching key and the input key, which are also the axis attribute input means 2, the current value of the X-axis coordinates is input to a predetermined macro variable 4 and "X" is registered in the memory 4 as an attribute.

Next, the second method, which is a method by key input, is shown in the lower table. This method by key input is used when only the attribute of the axis is changed without changing the value of the macro variable. By inputting the axis attribute by the axis attribute input means 2, for example, inputting "Z" for the Z axis, "Z" is registered in the memory 4 as the axis attribute. The determination means 7 determines whether or not there is an axis movement command by a macro variable (step S1), and if there is no such axis movement command, returns to (step S1). Conversely, if there is an axis movement command by a macro variable, the axis attribute information of the found macro variable is retrieved from the memory 4 (step S2).

Next, it is determined whether or not there is an axis attribute of the macro variable taken from the memory 4 (step S3).
If there is no axis attribute, an axis movement command is issued to a predetermined motor (step S6). Conversely, if there is an axis attribute, the command axis of the axis movement command is extracted (step S4), and then the process proceeds to the following (step S5).

The determination means 7 takes in the axis coordinate data of the macro variable in the memory 4, the data of the axis attribute of the memory 4, and the command axis determination result of the program decoding section 61, and determines the axis attribute of the memory 4 for the same macro variable. It is determined whether the movement command axes of the axes obtained by decoding the memory 6 as a program match or not (step S5), and if the determination results match, a movement command of the axis is issued (step S5). S6) However, conversely, for example, if the axis of the macro variable stored in the memory 4 is the Z axis even though the axis of the movement command of the program 6 is the X axis, there is a mismatch, so the execution of the axis movement command is stopped. Then, an error is displayed (step S7).

In the above embodiment, a microprocessor (CP
FIG. 2 shows a block diagram in the case of realizing using U). The CPU 71 has a built-in ROM and RAM.
In the OM, an axis attribute processing program that functions as the determination unit 7 and the program decoding unit 61 in FIG. The CPU 71 thus configured performs the same functions and operations as those of the determination unit 7 and the program decoding unit 61 of FIG. The axis attribute input means 2 and other blocks are the same as those in FIG.

In the above embodiment, the case where the program 6 defines the command axis relating to the macro variable has been described. However, the command axis may be omitted in the program and the axis movement command may be issued according to the axis having the axis attribute. For example, the command of the program 6 is X [#
500]; X is omitted at the time of the command of “# 500”;
In the example of FIG. 4, since the axis attribute of the macro variable # 500 is "X", the same axis movement as that of X "# 500]; is performed.

In the above embodiment, the coordinate values of the axis coordinates and the axis attributes are stored in macro variables having the same number, but they may be stored in macro variables having different numbers. More specifically, for example, the axis coordinates are from # 500 to # 549.
And the corresponding axis attribute is # 550
To # 599.

[0027]

As is apparent from the above description, the present invention provides an axis attribute input means for inputting, to a macro variable, an axis attribute for specifying an axis to which the macro variable relates, and an input axis attribute. An axis attribute storage unit for storing an attribute, a program unit for controlling the numerical controller, a program decoding unit for decoding the program, a movement command axis of an axis movement command based on a predetermined macro variable obtained by the decoding, and Axis attribute determining means for determining whether or not the axis attribute assigned to the macro variable matches; and, if the results of the axis attribute determining means match, issue a movement command for the predetermined axis and issue the axis attribute determination. If the results of the means do not match, the axis movement control means that stops execution of the axis movement command is provided, so that the macro variable and axis attribute If the axis movement command having a combined have been made, execution of the axial movement of the numerical controller is stopped. Therefore, there is an effect that erroneous axis movement of the numerical controller can be prevented and safety is improved.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of an embodiment in which the numerical controller according to the present invention is configured using a microprocessor.

FIG. 3 is a diagram showing an axis attribute input procedure of an embodiment of the numerical controller according to the present invention.

FIG. 4 is a diagram showing contents of a memory for storing macro variables and axis attributes according to the embodiment.

FIG. 5 is a flowchart illustrating the operation of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Memory (position) 2 Axis attribute input means 3 Input buffer 4 Memory (macro variable: axis coordinate and axis attribute) 6 Memory (program) 61 Program decoding part 7 Judgment means 8 X axis motor control part 9 Z axis motor Motor controller 10 X-axis motor 11 Z-axis motor 71 Microprocessor

Claims (1)

(57) [Claims] 1. A numerical control device having a plurality of axis controllers, wherein: an axis attribute input means for inputting an axis attribute for designating an axis to which the macro variable relates to a macro variable; An axis attribute storage unit, a program unit for controlling the numerical control device, a program decoding unit for decoding the program, a movement command axis of an axis movement command based on a predetermined macro variable obtained by the decoding, and the macro Axis attribute determining means for determining whether or not the axis attribute given to the variable matches; and, if the result of the axis attribute determining means matches, issuing the movement command of the predetermined axis and issuing the axis attribute determining means. And a shaft movement control means for stopping execution of the movement command of the axis if the result of (1) does not match.