JPH0729028A - Moving picture processing method for numerical controller - Google Patents

Abstract

PURPOSE:To execute a moving picture processing without flicker by once copying a data area in a video buffer memory, deleting data of a tool graphic, plotting tool graphic data for a moving destination and overwriting it on the data area of a copy source at a copy destination CONSTITUTION:Data of a data area 3a in a memory area 2a used for screen display is once copied in the appropriate data area 3b of a memory area 2b which is not used for screen display. Then, original graphic data 4a copied in the area 2b is deleted, and graphic data 4b in the same size is plotted at a position detached by a distance to be moved. Since graphic data 4a of the data area 3a in the area 2a exists as it is, the tool graphic of a display screen is displayed as it is. The data area 3b of the area 2b is overwritten on the same data area 3a of the area 2a. Thus, the moving picture of the tool graphic can be obtained by continuously repeating a series of works.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving picture processing method for a numerical control device, and more particularly to a moving picture for a numerical control device for moving a predetermined figure such as a tool on a display screen when performing a cutting simulation or the like with the numerical control device. Regarding processing method.

[0002]

2. Description of the Related Art In a numerical control device used for an industrial machine tool or the like, when a machine tool is used for machining, a desired shape may not be obtained or a workpiece and a tool may interfere with each other. As a result, the time spent for machining is wasted, leading to a reduction in the operating rate of machine tools. In order to avoid such situations as interference between the work and the tool during machining, first, before machining, simulate the cutting situation on the display screen of the numerical controller to verify the validity of the machining program. There is. Through this verification, it is possible to eliminate problems in actual machining in advance and prevent a decrease in the operating rate of the machine tool.

In this cutting simulation, on the display screen of the display device, first, a graphic corresponding to a member necessary for machining a work or a tool is displayed. Then, similarly to the actual machining, a figure such as a tool is moved to display the cutting process or turning process of the work in real time. In this way, it was possible to check the interference between the work and the tool during machining.

Here, drawing of this kind of tool or the like on the display screen has heretofore been carried out by using special animation hardware or by software processing.

In a moving image processing method using hardware for special animation, when a tool figure is stored in a certain memory and is displayed, the stored figure is displayed by shifting the display position little by little. By making them appear, the tool appears to be moving.

FIG. 6 is an explanatory diagram showing a conventional example of a moving image processing method in which the movement of a tool figure is performed by software in a video buffer memory. In the figure, (A) is an image matrix 1a representing an image pattern of a tool related to movement,
(B) shows the logical matrix 1b of the image pattern. To simplify the explanation, the tool figure is 3 dots ×
It has a size of 4 dots, and the figure moves to the right by 1 dot. Further, in the image matrix 1a, a portion corresponding to a tool is shown by hatching, and in the logical matrix 1b, a logical value "1" is given.

Now, a method of moving the tool graphic will be described. First, the tool graphic is erased in the video buffer memory. That is, the exclusive OR operation is performed on the figures of the same logical matrix 1b at the same memory location. As a result, all the memory areas having the same logical value "1" or "0" have the logical value "0", the video buffer memory has the logical matrix 1ba, and the image on the display screen has the image matrix 1aa. To be done. Next, the graphic of the logic matrix 1b is subjected to an exclusive OR operation with the graphic at the memory position one dot to the right, and the drawing process of the tool graphic is performed. As a result, the image matrix 1ab is formed on the display screen, and the logical matrix 1bb is formed in the video buffer memory, so that the operator looks as if the tool has moved. In this way, a moving image can be obtained by performing the exclusive OR calculation every time the tool graphic is erased and drawn and repeating these two exclusive OR calculations continuously.

[0008]

By the way, in the conventional moving image processing method for a tool figure, the method using the special animation hardware first requires additional hardware, which increases the cost.
On the other hand, in the method of obtaining the moving image by performing the exclusive OR operation twice, the erasing and drawing of the tool figure are alternately performed.
There is a problem in that the graphic display on the screen flickers, making it very unsightly.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a moving image processing method for a numerical control device capable of performing moving image processing without flicker without using special animation hardware. To aim.

[0010]

In order to solve the above problems, the present invention provides a moving image processing method of a numerical control device for displaying a moving image of a tool figure in a cutting simulation or the like.
In the video buffer memory used for graphic display, copy the data area containing the data of the tool graphic to be moved to the memory not used for graphic display, and delete the data of the tool graphic in the copied data area. Draw the data of the tool figure at another position in the data area,
There is provided a moving image processing method for a numerical control device, which comprises copying the drawn data of the tool graphic to a copy source data area in a video buffer memory used for displaying the graphic and overwriting the data area.

[0011]

[Operation] When displaying a tool figure as a moving image in a cutting simulation or the like, first, the tool figure data in the video buffer memory used for the figure display is displayed on the screen and the data area containing the tool figure data is also displayed as a figure. Copy to memory not used by. Next, while maintaining the screen display of the tool graphic data in the video buffer memory used for graphic display, the data of the tool graphic is erased from the data area copied to the memory not used for graphic display and the same. Draw the same tool figure data at different positions in the data area. By overwriting the data of the drawn tool figure in the same data area in the video buffer memory used for displaying the figure, the erasing process on the screen of the tool figure before the movement is eliminated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of the principle of a moving image processing method of a numerical controller according to the present invention. In the figure, reference numeral 2 denotes a video buffer memory of the numerical control device, and the area above the central dashed line is a memory area 2 used for screen display.
The lower area a shows a memory area 2b in the same video buffer memory 2 which is not used for screen display.

Now, the tool graphic in a certain display area is displayed on the display screen, and the video buffer memory 2
Is the data area 3a of the storage position corresponding to the display area.
It is assumed that the tool graphic data 4a is stored in. For convenience of description, in the display in the video buffer memory 2, the data area 3a indicates a display area in the vicinity of the tool graphic displayed on the display screen, and the graphic data 4a therein is the displayed tool. The figure is a diagrammatic representation, not a representation of the logical states in memory.

When moving the tool graphic displayed on the screen, as shown in FIG. 1A, first, the data in the data area 3a in the memory area 2a used for the screen display is Once, the entire data is copied to an appropriate data area 3b of the memory area 2b which is not used for screen display. Next, as shown in FIG. 1B, the original graphic data 4a copied to the memory area 2b that is not used for screen display is erased, and the graphic data of the same size is placed at a position separated by the distance to be moved. 4b is drawn. At this time, the data area 3a of the memory area 2a used for screen display
Since the graphic data 4a of No. 4 is left as it is, the tool graphic on the display screen is displayed as it is. And FIG. 1 (C)
As shown in, memory area 2 not used for screen display
The data area 3b of b is overwritten on the same data area 3a of the memory area 2a used for screen display. By successively repeating these series of operations, a moving image of the tool figure can be obtained.

FIG. 5 is a block diagram showing the configuration of a numerical controller according to an embodiment of the present invention. In the figure, a processor 11 is a central processor for controlling the entire numerical controller, and a read-only memory 1 is provided via a bus 21.
The system program stored in No. 2 is read out, and the control of the entire numerical controller is executed according to this system program. The random access memory 13 stores temporary calculation data, display data, tool graphic data, and the like. The non-volatile memory 14 stores data such as a tool correction amount, a pitch error correction amount, a machining program and parameters to be retained even after the power is turned off.

Programmable machine controller 2
Reference numeral 2 is built in the numerical control device and controls the machine tool 20 by a sequence program created in a ladder format. That is, according to the M function (auxiliary function), S function (spindle function) and T function (tool function) instructed by the machining program, these are converted into signals necessary for the machine tool 20 by the sequence program and the machine tool 20 is converted. Output to the side. This output signal drives a magnet or the like of the machine tool 20 to operate a hydraulic valve, a pneumatic valve, an electric actuator or the like. Further, it receives contact signals from the machine tool 20, such as limit switches and switches on the machine operation panel, performs necessary processing, and passes the signals to the processor 11.

The axis control circuit 18 receives the movement command for each axis from the processor 11 and outputs the command for each axis to the servo amplifier 19.
Output to. The servo amplifier 19 receives the movement command and drives the servo motors of the respective axes of the machine tool 20.

Further, a CRT / MDI (Cathode Ray Tube / Manual Data I) for interfacing with an operator is provided.
The nput unit 25 has a graphic control circuit 15, a display device 16, a keyboard 17 and a software key 23. The graphic control circuit 15 converts digital data such as the current position of each axis, alarms, parameters and graphic data into an image signal and outputs it. This image signal is sent to the display device 16 and displayed. Keyboard 17
Consists of symbolic keys, numeric keys, etc., and inputs the required figure data and numeric control data using these keys. The software key 23 is a command key whose function is changed by a system program or the like, and the function name or the like is displayed at a predetermined screen position of the display device 16.

FIG. 2 is an explanatory diagram showing an embodiment of the moving image processing method of the numerical control apparatus according to the present invention. In this embodiment, the numerical controller is constructed by using a personal computer. Personal computers are, for example, US I
BM's PC / AT series personal computer with 256 kilobytes of display video buffer memory. The video buffer memory can be a graphic VRAM implemented in the graphic control circuit 15 shown in FIG.

VGA (Vi) with video mode 12 hex capable of graphic display with a resolution of 640 × 480 dots.
In the deo Graphics Array), the first 152 kilobytes of the 256 kilobyte video buffer memory are used for display. That is, the number of bytes required to perform the graphic display of 640 × 480 dots is only 152 kilobytes. Therefore, when the video buffer memory is used in that video mode, the remaining 104 kilobytes of memory is a memory area not used for screen display. The present invention uses 256 kilobytes of video buffer memory used for screen display and the remaining 104 kilobytes of video buffer memory not used for screen display to perform moving image processing.

In FIG. 2, the video buffer memory 2 has a storage capacity of 256 kilobytes as a whole, and an area above the central dashed line is a 152 kilobyte memory area 2a used for screen display, and a lower area is the screen. It is a memory area 2b of 104 kilobytes which is not used for display.

Now, a tool graphic to be moved is displayed in a certain display area on the display screen, and the graphic data 4a of the tool graphic is stored in the storage location corresponding to the display area in the video buffer memory 2. Suppose First is Figure 2.
As shown in (A), the graphic data 4 in the memory area 2a
Although a is copied to the memory area 2b, at this time, the data area 3a including at least the graphic data 4a of the tool graphic to be moved which is the copy source is determined.

FIG. 3 shows a data area 3 including graphic data 4a.
It is a figure which shows the detailed example of a. In this figure, FIG.
(A) shows an example of the data area 3a of the copy source, and the data area 3a is provided in four extra directions according to the number of moving dots of the graphic data 4a of the tool graphic to be moved. In the illustrated example, the tool figure is supposed to move by one dot, and therefore the data area 3a is taken larger by one dot than the figure data 4a of the tool figure. Of course, these extra dots may be larger than the moving dots.

The data area 3a defined in this way
Is once copied to the data area 3b of the memory area 2b which is not used for screen display. Next, as shown in FIG. 2B, the graphic data 4a in the data area 3b is erased, and the graphic data 4b is moved to a position separated by the number of moving dots in the moving direction.
Is drawn. This drawing state is shown in FIG. The illustrated example shows a case where the tool figure moves one dot to the right. Of course, the display screen at this time is the graphic data 4a of the data area 3a of the memory area 2a.
Since there is no change in, the tool figure is displayed as it is.

Finally, as shown in FIG. 2C, the data area 3b of the memory area 2b not used for screen display is copied to the copy source data area 3a and overwritten. As a result, the tool figure can be moved smoothly without disappearing on the way. Then, by successively repeating these series of operations, a moving image of the tool figure can be obtained.

FIG. 4 is a detailed view showing another example of the copy source data area 3a. According to this figure, as shown in FIG. 4A, the moving direction of the copy source data area 3a is taken into consideration, and in addition to the figure data 4a, an extra area is secured in the moving direction by the number of moving dots. ing. The illustrated example shows the case where the tool figure moves downward by 2 dots, and therefore, the data area 3a is taken below the figure data 4a of the tool figure by 2 dots. This has an advantage that the work area in the memory area 2b can be reduced. On the other hand, in the embodiment of FIG. 3, since the data area 3a is set to be large in the four directions of the graphic data 4a regardless of the moving direction of the graphic data 4a, it is possible to move in any direction. Therefore, since it is not necessary to know the moving direction in advance, there is an advantage that the calculation for the moving process is simple.

[0027]

As described above, according to the present invention, when a tool figure is moved and displayed in a cutting simulation or the like,
A data area containing the data of the tool figure to be moved,
Since it is once copied to the video buffer memory that is not used for figure display, the tool figure data is erased at the copy destination and the tool figure data is drawn to the move destination, and this is overwritten in the data area of the copy source. Flicker-free video processing is possible without using special hardware.

[Brief description of drawings]

FIG. 1 is a principle explanatory diagram of a moving image processing method of a numerical control device according to the present invention.

FIG. 2 is an explanatory diagram showing an example of a moving image processing method of the numerical control apparatus according to the present invention.

FIG. 3 is a diagram showing a detailed example of a data area including graphic data.

FIG. 4 is a detailed diagram showing another example of a copy source data area.

FIG. 5 is a block diagram showing a configuration of a numerical control device according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a conventional example of a moving image processing method in which a tool figure is moved by software in a video buffer memory.

[Explanation of symbols] 2 Video buffer memory 2a Memory area used for screen display 2b Memory area not used for screen display 3 Data area 4 Graphic data

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Claims (4)

[Claims] 1. A moving image processing method of a numerical control device for displaying a moving image of a tool figure in a cutting simulation or the like, wherein a data area containing data of a tool figure to be moved is created in a figure in a video buffer memory used for displaying the figure. Copy to a memory not used for display, erase the data of the tool figure in the copied data area, draw the data of the tool figure at another position in the same data area, and draw the data of the tool figure. A moving image processing method for a numerical control device, comprising: copying to a data area of a copy source in a video buffer memory used for graphic display and overwriting. 2. The numerical control according to claim 1, wherein the data area in the video buffer memory used for displaying the graphic includes an extra number of dots corresponding to at least the moving amount in four directions of the tool graphic. Video processing method of the device. 3. The numerical value according to claim 1, wherein the data area in the video buffer memory used for displaying the figure includes at least the number of dots corresponding to the movement in the movement direction of the tool figure. Video processing method of control device. 4. The moving image processing method of the numerical controller according to claim 1, wherein the memory not used for the graphic display is a video buffer memory.