JPS59172018A - Setting device of original point - Google Patents

Abstract

PURPOSE:To set accurately an original point and at the same time to attair automatic correction of the original point by comparing the timing information given from an angle detector and the timing information stored in a memory. CONSTITUTION:An angle detector 3 is connected to a shaft 2 which interlocks a main can 1 to obtain the angle information. At the same time, the original point information detected by a photoelectric switch 5 and an original point detector 6 is supplied to a cycle timer device 4 to be stored there. For this control, a central processing unit CPU8 stores the original point information to a nonvolatile memory 10 based on a control program on the device 4 which is stored in a fixed memory 9 and the angle information on a machine. This stored angle information is compared with the angle information given from the detector 3. Then the control data is delivered to a controller 7.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an origin setting device when a cycle timer device is used to obtain operation timing in an automatic machine or the like.

Conventional Structure and Problems Conventionally, as a means for obtaining control timing in sequence control of machines, for example, there is a cycle timer device (Japanese Unexamined Patent Publication No. 525-28135).

This uses a low-resolution encoder in the part that detects angle information from the outside, compares the timing information input from this encoder with the timing information stored in memory, and outputs a signal if they match. Compared to previous program switches and cam switches, this has the advantage of improved setting accuracy and reduced adjustment time.

Generally, automatic machines operate by repeating a series of operations as a cycle, and usually, in order to make control easier, a specific position during the cycle is detected and this is set as the origin. I'm handling it. The control is a sequence control that proceeds sequentially with this origin as a reference, so setting the origin is an essential element to obtain accurate position information.

However, in the cycle timer device,
Setting the origin of automatic machines had to be done by humans, which was a hassle. In addition, if the set origin changes due to some reason, you will need to set the origin again.
It had a point.

OBJECTS OF THE INVENTION The present invention solves the problems of the prior art as described in 1-1 and makes it easier to set the origin of an automatic machine. 1 (An object of the present invention is to provide an origin setting device that enables automatic repair of the origin setting even if the origin setting is incorrect.

Structure of the Invention The present invention includes an origin detector that detects the origin of a controlled object;
It consists of an angle detector that detects angle information, and a cycle timer device that compares the timing information manually input from the angle detector with the timing information stored in memory, and outputs a signal when they match, making it easy to set the origin. It has the effect that it can be carried out.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In Fig. 1, 1 is the main cam which is the object to be controlled;
It is linked to main cam 1 in Hanyafuto. An absolute rotary encoder 3 which is an angle detector is connected to the shaft 2, and origin information is inputted to the cycle timer device 4 through a photoelectric switch 5 and an origin detector 6. The cycle timer device 4 inputs information to the control device 7 according to the rotation of the shaft 2 based on the origin detection switch 5 and the origin information.

Regarding the origin setting device configured as described in 1- below,
The operation will be explained in detail using FIG. In FIG. 2, 8 is a central processing unit (hereinafter referred to as CPU), which compares the origin information of the main cam 1 with the angle information of the machine, and controls the control device 7. J9 is a fixed memory that stores a program for controlling the cycle timer device 4 in the form of instruction codes, and also stores machine angle information. First, by rotating the main cam 1, which is the object to be controlled, once, the main cam 1 is brought to its origin position.
Now, the origin information is stored in the non-volatile memory 1, 1101c from the on/off information of the photoelectric switch 5 and the origin detector 6fl. Then, the CPU 8 stores i';[ in the fixed memory 9.
- + memorized force, angle information and angle melon 1 input from angle detector? It compares the J report and outputs control data to the control device 7.

If the connection point between the shaft 2 and the absolute rotary encoder 3 is shifted, and the origin information at this time is different from the initial origin information stored after first rotating the main cam 1, which is the controlled object, once, the initial origin information is erased, the origin information at this time is re-stored in the non-volatile memory 1o as the new cool point information, and the same operation is performed thereafter.

The above is an explanation of one embodiment of the present invention. In this embodiment, an example was explained in which a photoelectric switch was used as a means for detecting the origin, but a micro switch was used.

The same effect can be obtained by detecting using a differential transformer, laser, camera, etc. Furthermore, although the explanation has been made using a direct method using the shaft 2 to connect the main cam 1, which is the object to be controlled, and the absolute rotary encoder 3, which is the angle detector, the same effect can be obtained by using a gear or the like.
Needless to say.

Effects of the Invention J-Detailed IK As explained, the VC1 present invention has the following advantages compared to the conventional origin setting: 1. Mechanical adjustment to align the origin of the controlled object with the origin of the angle detector is not required, and no one can set the origin. Even if this is done, if the controlled object is rotated once, the origin can be set automatically and accurately, and the time required to set the origin can be shortened.

2. Even if the connection point between the controlled object and the angle detector becomes misaligned due to slippage, etc., the origin setting can be automatically corrected.

It has this effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an origin setting device in an embodiment of the present invention, and FIG. 2 is a block diagram of a control section of a cycle timer device. 2...-Shaft, 3...Absolute-1, equation mouth ~ Taly encoder, 4...Cycle timer device, 6, Photoelectric switch, 6... River origin detector, 7... River... Control device. Name of agent: Patent attorney Toshio Nakao (1st person)
figure

Claims (1)

[Claims] 1111 carving (j An angle detector that converts mechanical angle information from an object into electrical angle information, and an original that detects the origin of the mechanical angle information and outputs this position information. , tMJ the controlled object and the angle detector)!1
・15-
The origin setting device comprises a cycle timer device which inputs a timing signal to the control device to control the origin.