JPH0390907A - Display system for numerical controller - Google Patents

Abstract

PURPOSE:To perform the graphic display at a high speed in accordance with the actual working by carrying out the comparison between a 1st memory which stores the shape of a work and the display data on a base screen and a 2nd memory which stores the display data on the shapes of tools. CONSTITUTION:A comparator 10 inputs the output of a work memory 3 and the output of an OR circuit 8 and compares the contents of the display data on these outputs. Then the comparatr 10 updates the contents of the memory 3 based on the result of the comparison. When the comparator 10 detects the discordance between the outputs of the memory 3 and the circuit 8, the memory 3 converts the work data on the discordant part into a background color. A work thus converted into the background color shows the shape of the work which is cut by a tool. When a tool 4a moves to the position of a tool 4b, a CRT 11 displays a screen where the work is cut and the present position of the tool. Thus it is possible to perform the graphic display at a high speed in accordance with the actual working without processing the work cutting sate in terms of software.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display method for a numerical control device that displays the cutting state of a workpiece on a display screen.

[Prior art] In a numerical control device (CNC), a workpiece shape and a tool are displayed on a display screen, the tool is moved on the display screen according to the execution of a cutting program, and the state in which the tool cuts the workpiece is shown on the display screen. Graphically displayed above.

Conventionally, in the graphic display of a numerical control device, the appearance of a workpiece being scraped off by a tool has been executed using software using a plurality of frame memories provided within the numerical control device.

For example, a workpiece memory that stores the workpiece shape and base screen display data, and a tool memory that stores the tool shape and window screen display data are provided inside the numerical control device, and the machine program By scrolling the display data on the window screen according to the movement path and using software to logically process and erase the shapes of the workpiece and tool that overlap with the window screen on the base screen, you can see how the workpiece is being scraped. it's shown.

[Problem to be solved by the invention]

However, with conventional graphic display methods, when drawing a large tool shape on a window screen and moving it at high speed, or when trying to display the simultaneous operation of many tools on a compound lathe, etc., the base screen The processing time required to erase the workpiece shape drawn on the image became a bottleneck.
There was a problem in that it was not possible to display high-speed graphics in line with actual processing.

The present invention has been made in view of these points, and it is an object of the present invention to provide a display method for a numerical control device that enables high-speed graphic display in accordance with actual machining.

Means for Solving the Two Problems] In order to solve the above problems, the present invention stores the display data of the workpiece shape and the base screen in the display method of the numerical control device that displays the cutting state of the workpiece on the display screen. A first memory, a second memory that stores tool shape display data, and the display data of the first and second memories are read out sequentially in synchronization with a clock signal, and their OR signal is displayed on the display screen. means for displaying on the first
The output of the memory is compared with the OR signal or the output of the second memory, and according to the comparison result, the data of the workpiece shape in the first memory is converted to the data of the base screen, and the data of the workpiece shape is A display method for a numerical control device is provided, which is characterized by means for creating data on a cutting state in which a shape is removed.

[Effect]

The first one stores the display data of the workpiece shape and the base screen.
Display data stored in this memory and a second memory that stores tool shape display data are sequentially read out in synchronization with the tarok signal, and their logical sum signal is displayed on the display screen. At this time, by comparing the output of the first memory and the OR signal or the output of the second memory, it is possible to detect whether there is interference between the weave and the tool. If there is interference between the workpiece and the tool, the data of the interference portion of the contents of the first memory is converted to data on the base screen. If there is no interference between the workpiece and the tool, the original contents are retained as they are.

As a result, the workpiece appears to have been scraped off.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing a schematic configuration of a display system of a numerical control device that is an embodiment of the present invention. CPU 1 is a microprocessor that controls the entire numerical control device. A graphic control circuit (CRTC) 2 converts data such as the current position and movement amount of each axis from the CPU 1 into a display signal and sends it to a display device. The display device is composed of a plurality of frame memories 3.4 and 5, a logic circuit, and a CRT (liquid crystal display) 11. Data buses 6 and 7 connect the CPU 1, the graphic control circuit 2, and the display device.

The work memory 3 stores display data indicating a work shape and a base screen (background screen). The tool memory 4 stores display data indicating the shape of the tool. The chuck memory 5 stores display data indicating the chuck shape. Each display data is sequentially read out in synchronization with the clock signal and output to the OR circuit 8. The OR output of the OR circuit 8 is amplified by an amplifier 9 and output to the CRTII.

The comparison circuit IO connects the output of the work memory 3 and the OR circuit 8.
The contents of the display data are compared, and the contents of the work memory 3 are updated based on the comparison results. .

If the tool exists at the position of the tool 4a in the tool memory 4, there is no interference between the tool and the workpiece, so the comparator circuit 10
The comparison result is a matching output. The work memory 3 that has received the matching output retains the original data as it is. Therefore,
The workpiece is displayed without being scraped off.

On the other hand, when the tool moves from the position of the tool 4a to the position of the tool 4b, the workpiece shape in the workpiece memory 3 and the tool in the tool memory 4 interfere. Due to this interference, the data of the interference portion of the workpiece shape from the OR circuit 8 is different from the data of the workpiece shape in the workpiece memory 3. That is, assuming that the workpiece in the work memory 3 is composed of blue (B) data and the tool in the tool memory 4 is composed of red (R) data, when the two interfere and overlap, the overlap The data for this part is a magenta color (Mg
). Therefore, the comparison circuit 10 detects a mismatch between the output of the work memory and the output of the OR circuit 8. When this discrepancy is detected, the work memory 3 stores the work data of the discrepancy in the background color (base screen data).
Convert to

The workpiece converted to the background color in this way shows the shape of the workpiece that has been cut away by the tool.

Since this operation is repeated thereafter, tool 4a becomes tool 4b.
When the tool moves to the position shown in FIG. 1, the CRTII displays a screen where the workpiece has been scraped off and the current tool position, as shown in the figure.

FIG. 2 is a diagram showing a schematic configuration of a display system of a numerical control device according to another embodiment of the present invention. Components that are the same as those in FIG. 1 are given the same reference numerals, so their explanations will be omitted. In this embodiment, the OR circuit 12 calculates the logical sum of the outputs of the tool memory 4 and the chuck memory 5, and outputs the output of the OR circuit 12 to the NAND circuit 13 and the OR circuit 8.

This embodiment is effective when the workpiece data in the workpiece memory 3 and the tool data in the tool memory 4 are monochrome data. That is, in the case of the display method shown in FIG. 1, it is difficult to compare the workpiece and the tool using the comparison circuit 10 when they are of the same color. However, in the case of this embodiment, even if the workpiece and the tool are of the same color, the NAND circuit 13 detects whether or not the workpiece and the tool have interfered. All you have to do is delete it from .

In the above description, a case has been described in which there is only one tool memory 4, but it is also possible to provide a plurality of tools according to the number of tools to be used and to perform graphic display using each display data stored in these.

Furthermore, in the case of a machine program such as a machine program for a back processing lathe in which the position of the workpiece moves on the base screen, the work memory may also be moved by the same amount of movement for graphic display.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to display high-speed graphics in accordance with actual machining without processing the cutting state of the workpiece using software.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic configuration of a display system of a numerical control device that is an embodiment of the present invention. FIG. 2 is a diagram showing a schematic configuration of a display system of a numerical control device that is another embodiment of the invention. It is. PU Graphic control device Memory for workpiece Memory tool Memory chuck Memory data bus OR circuit Amplifier comparison circuit RT OR circuit NAND circuit

Claims (3)

[Claims] (1) In the display method of the numerical control device that displays the cutting status of the workpiece on the display screen, the first
a second memory for storing display data of the tool shape; the display data of the first and second memories are sequentially read out in synchronization with a clock signal, and the OR signal of these is displayed on the display screen. a means for displaying, comparing the output of the first memory and the logical OR signal, converting data of the workpiece shape in the first memory into data on the base screen according to the comparison result; 1. A display method for a numerical control device, comprising means for creating data on a cutting state in which a shape is removed. (2) In the display method of the numerical control device that displays the cutting status of the workpiece on the display screen, the first
a second memory for storing display data of the tool shape; the display data of the first and second memories are sequentially read out in synchronization with a clock signal, and the OR signal of these is displayed on the display screen. displaying means, comparing the output of the first memory and the output of the second memory, and converting the data of the workpiece shape in the first memory into the data of the base screen according to the comparison result; A display method for a numerical control device, comprising: means for creating data on a cutting state in which the workpiece shape is removed. (3) A display system for a numerical control device according to claim 1 or 2, characterized in that a plurality of said second memories are provided depending on the type of tool.