JPH089763Y2 - Numerical control unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention relates to a numerical controller suitable for use in a machine tool that moves a workpiece or a tool for machining on XY coordinates.

"Prior art" Conventionally, NC (numerical control) is used as one of the automatic control methods in many machine tools. This NC controls subtle motions by giving numerical commands to machine tools that perform complicated motions.

"Problems to be solved by the invention" By the way, since the above-mentioned conventional numerical control device was designed to perform highly accurate control, it was introduced for a machine tool that does not require so much precision because it is expensive. However, there is a problem in that the operation is difficult and the operation is not convenient.

This invention was made in view of the above-mentioned problems,
An object of the present invention is to provide a numerical control device that can be introduced at low cost, can be easily operated, and can be easily applied to various machine tools.

"Means for Solving the Problems" FIG. 1 is a block diagram showing the configuration of the present invention.

In this figure, in order to solve the above-mentioned problems,
In this invention, in a numerical control device for controlling a moving body on XY coordinates, a first detecting means 1 for detecting a moving amount of the moving body in the X-axis direction and a moving amount of the moving body in the Y-axis direction are detected. Position data of the moving body on the X-axis based on the moving amount of the second detecting means 2 and the moving amount of the first detecting means 1, and Y of the moving body from the moving amount of the second detecting means 2. Coordinate generating means 3 for obtaining position data on the axis, address generating means 4 for generating predetermined address data according to each position data on the X axis and Y axis obtained by the coordinate generating means 3, and the XY
An address is assigned so as to correspond to the coordinate space, and storage means 5 in which image data representing the moving body is stored at the address indicated by the address data, and a display for displaying the image data stored in the storage means 5. Means 6 and control means 7 for controlling the moving body based on the image data stored in the storage means are provided.

[Operation] When the control means moves the moving body on the XY coordinates according to each of the 7 position data, the first detecting means 1 and the second detecting means 2 detect the moving amount of the moving body on the XY coordinates. To do. Next, the coordinate generation means 3 obtains new position data on the X-axis and the Y-axis of the moving body according to the moving amount. Then, the address generating means 4 generates predetermined address data according to the new position data. At the address of the storage means 5 indicated by the address data, image data showing the moving body is stored, and this image data is displayed by the display means 6. Further, the control means 7 controls the position of the moving body based on the image data stored in the storage means 5.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a conceptual diagram showing the configuration of a chamfering device according to an embodiment of the present invention. In this figure, 11 is a roller conveyor, which is composed of a plurality of rollers arranged in one direction at predetermined intervals. The roller conveyor 11 is driven by an electric motor 12. The rotation speed of the electric motor 12 is
Since the chamfering device does not require so much precision, it is controlled by an inverter. Further, one of the rollers of the roller conveyor 11 has a rotary encoder.
13 is attached (in the case of this example, the central roller shown), and generates a two-phase pulse (+ origin signal) PS1 according to the rotation speed of the roller conveyor 11 and its direction,
This is supplied to the interface 14.

The above-mentioned roller conveyor 11 conveys the work 15 in the direction of arrow A shown by the drive of the electric motor 12. In the case of this example, the work 15 is a splicing plate used for joining a plurality of blocks constituting a structure such as a bridge. In order to join the above blocks to this work 15,
There are several holes through which the bolts pass. These holes are chamfered by the chamfering tool 16 in consideration of the durability of the bolt. The chamfering tool 16 is screwed onto the drive shaft 17, and is freely moved in the direction of arrow B shown by the rotation of the drive shaft 17. An electric motor 18 is provided at one end of the drive shaft 17, and the shaft 17 is driven by the electric motor 18. Also,
A rotary encoder 19 is attached to the other end of the drive shaft 17. The rotary encoder 19 is composed of a well-known pulse generator in which a photo interrupter 19a and a notched disk 19b are combined, and generates a two-phase pulse PS2 according to the rotational speed of the drive shaft 17 and its rotational direction, and interfaces this. Supply to 14.

The interface 14 described above uses an electrically isolated photocoupler and supplies the two-phase pulses PS1 and PS2 to the mouse connector of the computer 20. A well-known personal computer is used as the computer 20, and various image processing can be performed by a built-in video RAM and a monitor display 20a (not shown). For example, in this example,
The computer 20 stores the image of the work 20 captured by a camera (not shown) in the video RAM. The image data stored in this video RAM is
It is displayed on the monitor display 20a as taken by the camera. Further, the monitor display 20a also displays a cursor CS corresponding to the above-described chamfering tool 16, moves in the Y-axis direction of the screen in response to the two-phase pulse PS1, and moves in the X-axis direction of the screen in response to the two-phase pulse PS2. Move to. In particular, in this embodiment, a well-known mouse driver is used for image display processing, and the rotary encoders 19 and 13 are made to correspond to the X and Y axis rotary encoders used in the mouse body. That is, this mouse driver automatically obtains the relative position of the chamfering tool 16 with respect to the work 10 as the XY coordinate of the monitor display 20a based on the two-phase pulse signals PS1 and PS2, and then the X
The Y coordinate is converted into an address in the video RAM, and the image data at that address is updated. Also, the computer 20
Calculates the position of the hole and cursor CS (chamfering tool 16) provided in the work 15 from the address of the video RAM and the data state of each address, and stores it in an array variable. Further, reference numeral 21 is a control device, and based on the positions of the holes and the cursor CS stored in the array conversion, the above-mentioned electric motor 12
By driving 18 and 18, the chamfering tool 16 is brought directly above the holes, and a predetermined chamfering operation is performed on all the holes.

Next, a display example of the screen of the monitor display 20a described above will be described with reference to FIG.

In this figure, the screen of the monitor display 20a is 4
It consists of 00 scanning lines, one scanning line is 640
It consists of dots. Therefore, the same screen displays dots of maximum X = 640, Y = 400, with the upper left corner being the origin X (horizontal direction) = 0, Y (vertical direction) = 0. Each dot is
It corresponds to one bit of a binary number, and the state of the one bit (1 or 0) represents the difference in the shape of the work 15. These dots correspond to the addresses of the video RAM every 8 bits (1 byte) sequentially from the origin = 0, Y = 0 to X = 640, Y = 400. For example, in this example, the origin X
The 8-dot state from = 0, Y = 0 to X = 7, Y = 0 corresponds to the image data fetched at the address 8000 of the video RAM. Furthermore, 8 from X = 8, Y = 0 to X = 18, Y = 0
The state of the dots corresponds to the image data captured at address 8001 of the video RAM. Below, X = 64 at the lower right corner
Addresses in the video RAM are sequentially corresponded to every 8 dots up to 0, Y = 400. That is, the monitor display 20a is
At one time, the horizontal direction of the work 10 is decomposed into a maximum of 640 dots and displayed, and the vertical direction is displayed for a maximum of 400 dots. In this case, one dot corresponds to 2 mm. In the video RAM, "1" is written in the bright portion of the image captured by the camera and "0" is written in the dark portion of each bit of each address. Also, the monitor display 20a displays each bit of the video RAM in white, for example, in the case of "1",
When it is "0", it is displayed in black.

According to the above-described configuration, first, when the power is turned on, the controller 21 drives the electric motor 12 to rotate the roller conveyor 11. As a result, the work 15 is conveyed in the direction of arrow A. The rotation of the roller conveyor 11 is detected by the rotary encoder 13 and supplied to the computer 20 via the interface 14 as a pulse signal PS1. The computer 20 measures the moving distance of the work 15 based on the pulse signal PS1. Also this work
When 15 is conveyed to a predetermined position, the shape of the work 15 is converted into image data by the computer 20 by a camera (not shown).
Is taken into. The computer 20 displays the work 15 on the monitor display 20a based on the image data, and moves the cursor CS in the Y-axis direction of the screen according to the moving distance of the work 15 described above.

Next, when chamfering the holes formed in the work 15, the computer 20 obtains the positions of the hole of the work 15 and the cursor CS on the video RAM, and uses these as position data. Store it in an array variable. And
The control device 21 drives the electric motors 12 and 18 based on the above position data to rotate the roller conveyor 11 and the drive shaft 17 and move the chamfering tool 16 directly above the hole. At this time, the rotations of the roller and the drive shaft 17 are detected by the rotary encoders 13 and 19, and are supplied to the computer 20 via the interface 14 as pulse signals PS1 and PS2. And computer 20
Measures the relative movement distance of the chamfering tool 16 with respect to the workpiece 15 based on the pulse signals PS1 and PS2, and obtains the position of the chamfering tool 16 on the XY coordinates. Further, the computer 20 obtains the address of the video RAM according to the position on the XY coordinates, and according to this address, the video RAM
Rewrite the image data for the cursor CS above. The monitor display 20a sequentially displays the image data of the video RAM.

As described above, in this embodiment, the relative positional relationship between the chamfering tool 16 and the work 15 in the chamfering work is displayed on the monitor display 20a in real time.

In this embodiment, the operator is
The advantage of being able to easily determine whether or not the chamfering tool 16 and the hole are properly aligned in the chamfering work can be obtained simply by confirming 20a.

Further, according to the above-described embodiment, since the personal computer is used as the computer 20 and the movement amount of the machine tool is converted by the two sets of the rotary encoder and the existing mouse driver, the personal computer is used. It is possible to freely select the numerical calculation and control judgment functions from the abundant instruction group, and to construct an excellent control system at low cost.

Further, since the mouse driver described above has a deceleration function, the numerical control device according to the present embodiment displays the maximum movement amount of the chamfering tool 16 on the maximum display screen of the monitor display 20a (in this example, the horizontal direction of the screen). Can be arbitrarily adjusted to, and there is an advantage that the scale of the machine tool is not limited.

[Advantage of Invention] As described above, according to this invention, the first and second detecting means for detecting the movement amount of the moving body are provided, and the first and second detecting means are provided. The position of the moving body is obtained from the moving amount of the moving body detected by the detecting means, the moving body is stored as image data based on the information of the position, and the moving body is numerically controlled according to the stored image data. As a result, there are advantages that it can be introduced at low cost, can be easily operated, and can be easily applied to various machine tools.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention, FIG. 2 is a conceptual diagram of a chamfering device using a numerical controller according to an embodiment of the present invention, and FIG. 3 is a display screen of a monitor display of the same embodiment. FIG. 1 ... First detecting means, 2 ... Second detecting means, 3 ...
Coordinate generation means, 4 ... Address generation means, 5 ... storage means, 6 ... display means, 7 ... control means.

Claims (1)

[Scope of utility model registration request] 1. A numerical controller for controlling a moving body on XY coordinates, comprising: first detecting means for detecting a moving amount of the moving body in the X-axis direction; and a moving amount of the moving body in the Y-axis direction. Second position detecting means for detecting the position data on the X-axis of the moving body from the moving amount by the first detecting means, and a moving amount on the Y-axis of the moving body from the moving amount by the second detecting means. Coordinate generating means for obtaining position data, address generating means for generating predetermined address data according to each position data on the X axis and Y axis obtained by the coordinate generating means, and addresses are assigned so as to correspond to the XY coordinate space. Storage means for storing image data representing the moving body at the address indicated by the address data, and displaying the image data stored in the storage means A numerical control device comprising: a display means; and a control means for controlling the moving body based on the image data stored in the storage means.