JP2771731B2 - CNC interference check method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic interference check system of a CNC (Numerical Control Unit) for checking interference of a tool, a work, etc.
The present invention relates to a graphic interference check method.

[0002]

2. Description of the Related Art Conventionally, as a method for checking interference of a tool, a workpiece, or the like in a CNC, first, a display memory is provided for each graphic to be subjected to interference check, and second, a display color is used for color display. Some have a display memory.

FIG. 6 is a diagram for explaining a first prior art. Here, a display memory 61 for the figure 68 and a display memory 62 for the figure 69 are provided to display the figure 68 and the figure 69 on the display screen 67 by simulation. The display memory 61 and the display memory 62
Are provided for RGB respectively in the case of color display.

The shift register 63 converts the image data of the parallel signal read from the display memory 61 into a serial signal, and sends the serial signal to the OR circuit 65 and the comparison circuit 66 as pixel data of one dot unit. Shift register 64
Converts the image data of the parallel signal read from the display memory 62 into a serial signal, and sends it to the OR circuit 65 and the comparison circuit 66 as pixel data of one dot unit.

[0005] The OR circuit 65 combines the pixel data from the shift register 63 and the shift register 64 and causes the display screen 67 to display it. The comparison circuit 66 detects pixel data from the shift register 63 and the shift register 64, and when the display overlaps on the same pixel,
It is determined that 8 and FIG. 69 are interfering, and an alarm is output.

FIG. 7 is a diagram for explaining a second prior art. Here, in order to display the graphics 77 and the graphics 78 on the display screen 76 in different colors, the graphics 77 and the graphics 78 are stored in the display memory 71 provided for each of the RGB colors. The shift register 72 converts the image data read from the display memory 71 into a serial signal and sends it to the display screen 76 as pixel data. Also, the shift register 72
Sends pixel data to the comparison circuit 75 as well.

The display color setting register 73 sends a signal indicating the display color of the graphic 77 to the comparison circuit 75 in response to a command from a processor (not shown). Similarly, the display color setting register 74 sends a signal indicating the display color of the graphic 78 to the comparison circuit 75 according to a command from a processor (not shown).

The comparison circuit 75 reads pixel data from the shift register 72 and compares the pixel data with display color signals from the display color setting register 73 and the display color setting register 74. That is, if the color of the pixel data from the shift register 72 is the same as the display color indicated by the display color setting register 73, it is recognized that the pixel data is a part of the image data of the graphic 77. Similarly, if the color of the pixel data from the shift register 72 is the same as the display color indicated by the display color setting register 74, it is recognized that the pixel data is a part of the image data of the graphic 78.

[0009] Thus, the comparing circuit 75, when the different color pixel data is continuously transmitted, i.e., when the different color pixel data is displayed next Ri suits dots,
It is assumed that the figures 77 and 78 are interfering on the display screen 76, and an alarm is output.

[0010]

However, these prior arts have the following problems. First, in the first prior art, since it is not possible to check for interference between figures stored in the same display memory, it is necessary to prepare display memories for the number of figures to be checked for interference.

On the other hand, in the second prior art, the comparison circuit 75
Since interference is checked by comparing colors, interference between figures of the same color cannot be checked. For this reason, it is necessary to prepare display color setting registers for the number of figures to be checked for interference. In addition, since the number of display colors is limited depending on the display device, there is a problem that the number of figures that can be checked for interference is limited depending on the display device used.

In addition to the above two conventional techniques, a method of performing an interference check by software is also conceivable. However, it is expected that the program will be complicated and the processing speed will be reduced, so that practical use is impossible. .

The present invention has been made in view of such a point, and without increasing circuits such as a display memory,
It is an object of the present invention to provide a CNC graphic interference check method capable of processing interference check of many graphics at high speed.

[0014]

According to the present invention, in order to solve the above-mentioned problems, in a graphic interference check system of a CNC (numerical control device) for checking interference of a tool, a work, or the like by simulation display, a graphic to be checked for interference. Logical color code for each image data of each target figure to distinguish
Display memory for allocating and storing code and interference check
The logical color code of the display memory corresponding to the target graphic
Converts the de into a serial signal, a shift register for outputting a pixel data of one dot unit, reads a logical color code of the pixel data along with receiving said pixel data from said shift register, the pixel data having different logical color code In the case where there is a continuation, it is considered that the target graphics have interfered with each other, and a comparison means for outputting an alarm is provided.

[0015]

The logical color code of each target graphic, which is stored in the display memory with a logical color, is converted into pixel data of one dot by the shift register and sent to the comparing means. The comparing means receives the pixel data from the shift register and reads the logical color code thereof. If pixel data having different logical color codes are consecutive, it is regarded that the target graphics have interfered with each other and an alarm is output. I do.

[0016]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic configuration diagram of hardware of a numerical control device for implementing the graphic interference check method of the present invention. The processor 11 controls the entire numerical controller according to a system program stored in the ROM 12. RO
EP12 or EEPROM is used for M12. The RAM 13 is a DRAM or the like, and stores various data or input / output signals. Non-volatile memory 14
The battery backed CMOS is used for
The parameters, the pitch error correction amount, the tool correction amount, and the like to be held even after the power is turned off are stored.

The graphic control circuit 15 converts the digital signal into a signal for display and supplies the signal to the display device 16. As the display device 16, a CRT or a liquid crystal display device is used.
The position display of each axis, the state of input / output signals, parameters, and the like are displayed. In addition, the display device 16 performs a simulation display of a work processing procedure and the like, and at this time, the graphic control circuit 15 performs a graphic interference check. The operation panel 17 includes a keyboard and the like, and is used for inputting various data or operating the machine tool 19.

A PMC (programmable machine controller) 18 receives an output signal via a bus 20, processes the output signal by a sequence program, and
9 is controlled. Also, receiving the input signal from the machine side,
Processing is performed by a sequence program, and an input signal is transferred to the processor 11 via the bus 20.

These components are connected to each other by a bus 20. In FIG. 2, components such as an axis control circuit, a servo amplifier, a servo motor, a spindle amplifier, and a spindle motor are omitted. Further, a multiprocessor system may be provided by using a plurality of processors.

FIG. 1 is a block diagram showing the configuration of the graphic control circuit 15. The processor (CPU) 1 includes:
The display memory unit 2, the logical color setting register 6, and the logical color setting register 7 are connected via the bus 9. A buffer memory (not shown) is connected to the bus 9 and sends drawing data to the processor 1.

The display memory unit 2 includes four display memories 2a.
To 2d. These display memories 2a to 2a
2d corresponds to each digit of a 4-digit logical color code described later, and stores image data set by the operator.

The display controller 3 simultaneously sends display instructions to the respective display memories 2a to 2d of the display memory unit 2, reads out the image data stored in the display memories 2a to 2d sequentially from the top of the frame, and sends them to the register unit 4. . The display controller 3 sends a vertical retrace signal to the processor 1 as an interrupt signal for each frame.

The register section 4 includes four shift registers 4
a to 4d. Each shift register 4a-
4d converts the image data sent from the display memories 2a to 2d into serial signals, and sends them to the color pallet 5 and the comparison circuit 8 as pixel data of one dot unit.

The color pallet 5 receives each pixel data output from the register section 4 in parallel, and handles it as a 4-digit logical color code. The logical color code is set in advance so that when storing image data in the display memories 2a to 2d, the logical color can be indicated for each pixel data unit. The color pallet 5 reads the logical color code, determines a color to be displayed, and sends a corresponding video signal to the display device 16.

Each time the processor 1 receives an interrupt signal from the display controller 3, it switches the graphics to be checked for interference, and sends the logical color codes of those graphics to the logical color setting register 6 and the logical color setting register 7.
The logical color setting register 6 and the logical color setting register 7
The value is held until a new logical color code is switched, and sent to the comparison circuit 8.

The comparing circuit 8 reads the pixel data from the register section 4 and compares the pixel data with the logical color codes from the logical color setting register 6 and the logical color setting register 7. Comparison circuit 8
When the logical color of the pixel data from the register unit 4 matches one of the logical color setting register 6 and the logical color setting register 7, it is determined which figure part the pixel data to be displayed on the display screen is. I do. The comparison circuit 8 determines the logical color for each dot in this way, and when pixel data of different logical colors are continuously captured, determines that the figures are interfering with each other, and issues an alarm to the processor 1. send.

Next, an example of a specific process of the graphic control circuit 15 having such a configuration will be described. FIG. 3 is a diagram illustrating an example of cutting simulation drawing. The chuck 31, the work 32, the tool 33, and the tool 34 are drawn on the display screen of the display device 16. These figures are displayed in different colors. These figures are given a logical color code for each part to be checked for interference, and stored in each of the display memories 2a to 2d of the display memory unit 2 according to the logical color code. Here, the parts to be subjected to the interference check include the chuck 31 and the work 3
2. The cutting edge 33a of the tool 33, the portion 33b other than the cutting edge of the tool 33, the cutting edge 34a of the tool 34, and the portion 34b of the tool 34 other than the cutting edge are raised.

FIG. 4 is a diagram showing an example of assignment of display colors and logical color codes to each check target portion. As can be seen from the figure, the display colors of the tool 33 and the tool 34 are the same red, but different logical color codes are given. These check target parts are stored as image data in the display memories 2a to 2d of the display memory unit 2 according to the respective logical color codes.

FIG. 5 is a diagram showing an example of a method of storing image data in the display memory unit 2. Display memories 2a to 2d
Are in a one-to-one correspondence from the upper digit of the logical color code. For example, a portion 33b other than the cutting edge of the tool 33
Since the logical color code is 0011, the image data is stored in the display memory 2d corresponding to the least significant digit,
It is stored in the display memory 2c corresponding to the third digit. Similarly, the other check target parts are also displayed in the display memory 2a.
To 2d.

In the display memories 2a to 2d in which the image data of each figure are stored as described above, the display controller 3 reads the image data from the top of the frame of the screen at the same time, and shift registers 4a to 4d of the register section 4. Sent to Each of the shift registers 4a to 4d converts the image data from the corresponding display memories 2a to 2d into serial pixel data, and sends it to the color palette 5 and the comparison circuit 8.

If the pixel data output from each of the shift registers 4a to 4d is arranged in order so that the shift register 4a has the highest digit, the logical color code shown in FIG. 4 is reproduced. The color palette 5 decodes the display color from the logical color code and displays it on the display device 16.

By such a method, a simulation drawing as shown in FIG. 3 is performed on the display screen of the display device 16. On the other hand, the processor 1 performs an interference check. This interference check is performed for two check target portions for each frame. Therefore, every time the retrace signal is sent from the display controller 3, the processor 1 sends the logical color codes of the two check target portions to the logical color setting register 6 and the logical color setting register 7, respectively.

In the case of the simulation drawing shown in FIG. 3, there are the following ten combinations for interference check. (1) Chuck 31 and a portion 33b other than the cutting edge 33a of the tool 33 (2) Chuck 31 and a cutting edge 33a of the tool 33 (3) Chuck 31 and a portion 34b other than the cutting edge 34a of the tool 34 (4) Chuck 31 and the tool 34 (5) A portion 33b of the work 32 and the tool 33 other than the cutting edge 33a (6) A portion 34b of the work 32 and the tool 34 other than the cutting edge 34a (7) A portion 33b of the tool 33 other than the cutting edge 33a and a cutting edge 34a of the tool 34. (8) A portion 33b other than the cutting edge 33a of the tool 33 and a cutting edge 34a of the tool 34 (9) A cutting edge 33a of the tool 33 and a cutting edge 34a of the tool 34
Other parts 34b (10) The cutting edge 33a of the tool 33 and the cutting edge 34 of the tool 34
a For example, at the timing of executing (1), the processor 1
Indicates that the logical color code (0001) of the chuck 31 is stored in the logical color setting register 6,
The logical color code (0011) of 3b is sent to the logical color setting register 7. These logical color codes are sent to the comparison circuit 8 for one frame.

The comparison circuit 8 converts the logically coded pixel data sent from the register section 4 into a logical color code (00
01) and the logical color code (0011). Since the pixel data changes in units of one dot, the comparison circuit 8
Performs a check each time, and if the pixel data matches the logical color code (0001), for example, it recognizes that the display color of the pixel data is the color of the chuck 31, that is, blue. On the other hand, if the pixel data is, for example, a logical color code (001)
If it matches 1), it is recognized that the display color of the pixel data is the color of the portion 33b other than the cutting edge 33a of the tool 33, that is, red.

In this way, the comparison circuit 8 determines that two figures are interfering if dots having different display colors continue in the middle of checking the display color of the pixel data as needed. In the example of (1), if pixel data having a display color of red is transmitted next to pixel data having a display color of blue, a portion 3 other than the chuck 31 and the cutting edge 33a of the tool 33 will be described.
3b is determined to be interfering. The comparison circuit 8 sends an alarm to the processor 1 immediately after detecting the interference. Similarly, the checks (2) to (10) are repeatedly performed.

As described above, in the present embodiment, the interference check of the graphic is performed using the logical color code. Therefore, even if the graphic has the same display color, the interference check can be performed for each part.

The image data is stored in the display memories 2a to 2d.
Since a logical color code is provided at the stage of storing a large number of display colors, a large number of display colors can be used with a small number of display memories.

Further, in this embodiment, 2
Since each piece was checked for interference,
It is only necessary to prepare two logical color setting registers 6 and the like. Further, in this embodiment, since the color palette 5 is used,
A correct display color can be easily reproduced from the pixel data represented by the logical color code.

[0039]

As described above, according to the present invention, the image data is logically colored and the interference of the graphic is checked by the logical color code. can do. Therefore, it is possible to perform a high-speed interference check for a large number of figures without increasing the number of circuits such as a display memory.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a graphic control circuit.

FIG. 2 is a schematic configuration diagram of hardware of a numerical control device for implementing the graphic interference check method of the present invention.

FIG. 3 is a diagram showing an example of cutting simulation drawing.

FIG. 4 is a diagram illustrating an example of assignment of a display color and a logical color code to each check target portion.

FIG. 5 is a diagram illustrating an example of a method of storing image data in a display memory unit.

FIG. 6 is a diagram illustrating a first related art.

FIG. 7 is a diagram illustrating a second conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processor (CPU) 2 Display memory part 3 Display controller 4 Register part 5 Color palette 6, 7 Logical color setting register 8 Comparison circuit 9 Bus

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G05B 19/4068 G05B 19/4061

Claims (1)

(57) [Claims] In a graphic interference check method of a CNC (numerical control device) for checking interference of a tool or a workpiece by simulation display , a logical color code for each image data of each target graphic for distinguishing the target graphic of the interference check. a display memory for storing by assigning the logical color code of said display memory corresponding to the target figure to perform the interference check into serial signals, a shift register for outputting a pixel data of one dot unit, from said said shift register reads the logical color code of the pixel data with receive pixel data, when the pixel data having different logical color code is consecutively assumes that the subject graphic to each other is interference, it has a comparing means for outputting an alarm A CNC graphic interference check method characterized by the following.