JPS59181995A - Control circuit for motor - Google Patents

Abstract

PURPOSE:To enable to accurately drive a motor by providing a P-ROM for converting into digital data for driving the motor by a memory tape for comparing and collating a shift register input with an input before one step, and providing a subtraction counter for accumulating the data. CONSTITUTION:Designation code of a destination from input lines 10, 11 for designating the destination is inputted to shift registers 12, 13. A P-ROM circuit 14 decodes the destination designating code of the input through the shift register and outputs binary data for converting the previous input, i.e., the step previous input state to new designation position to a data line 15. A counter 16 temporarily holds and stores the data from the line 15. A motor is controlled to be driven by the value of the counter.

Description

[Detailed description of the invention] (a) Technical field of the invention The present invention relates to a motor control circuit.

(b) Background of the Technology The present invention relates to a high-precision positioning mechanism for a movable body of a mechanical device using a pulse motor as a drive source. A commonly used system 7i111 circuit; this is what was presented.

(C) Between the prior art 181-point pulse-resistance and DCC morphs, I! In automatic υj assembly devices that use the first section, rib, and moon, the movable body of the device is often moved a fixed distance from a specific position to another specific position.

In this case, the amount of movement (mechanical amount) is generally determined by digitally processing the amount of morph rotation and the direction of rotation.

The illustrated pattern in FIG.
) Shows the pattern for specifying the position of the oJ chokubo body, O, l,
2° and 3 are the positions where the movable body is moved from point -1 to point -1. If g
;i: Anti-1IJl meter direction (-) Specify any direction and the motor is proportional to the amount of 3 rotation angles! Apply a 9iJ+ pulse.

Further, following the above, in order to move the movable body from the position 2 to the position 1, the opposite direction is specified and at the same time, the same pulse application (digital control pulse) of 2/2 of the rotation angle amount is applied. It will be done.

However, for machine M control using the above-mentioned position designation input.

A mechanical origin is required that uniformly determines the initial motor shaft position. For this reason, the control motor has an optical slit plate that electrically detects the zero point, as shown in the figure, and a memory that recognizes the position detection and detection state of a photo sensor circuit.

Conventionally, in order to automatically control the movement of the mechanical quantity two times according to a predetermined procedure, it is necessary to perform software processing using a program for computer processing, or to completely control the program related to the automatic control. It is stored in memory and controlled by table processing in the memory.

However, the above-mentioned computer software 1-processing has problems such as high equipment cost and time required to scale up the system.

(d) Purpose of the invention The present invention is to solve the above problems.

The present invention provides an economically inexpensive method for calculating the number of pulses that determines the direction of rotation and amount of movement of a motor without using computer software processing. The goal lies in embodying a circuit that makes 1lll ``iJ-functional''.

(e) Structure of the Invention The above object is to input the designation of the movement destination i-4-1, and then combine this with the human power in front of the steno knob (qy HH<4) to move the specified code position Q to the movable body. Move Jj)l-1! Shift motor: 1iij In the control circuit, compare the manual shift register 1 or manual input 7 with the manual input of the shift 1 register and the input before the step. It is equipped with a P-ROM that converts a decile take (this is converted by a motor) and a subtraction counter that accumulates the decile take of the P-ROM conversion. Achieved by Sukoyoshi.

3. Detailed explanation of the invention. 1゛^], the example is shown in Figure 1, Example 4, [Ni1
5.Explain the destination of a fixed movable body using an example-3
-ru.

Figure 2 Pulsmoke system fri11th inscription BL:l ,,
In this figure, the motor-driven cycle pulse generation circuit and the mechanical origin setting circuit at the initial stage of motor startup are not shown.

In the circuit configuration in Fig. 2, 10 and 11 are input lines for specifying the movement destination, 12 and 13 are shift 1 to registers, and 14 bar
Decodes the human power movement destination designation code through the i + nft register and the previous human power 1j) Jchi, - transforms the state from the previous human power state to the new designated position. lOM circuits 1 and 15 are P
TR exposure power (previous data line).

Further, 16 is a counter circuit (commonly called a subtraction counter) that temporarily stores the data from the data line 15. Therefore, the circuit operation of Fig. 2 is as follows:
Also, the destination is the input state before the step +iiJ
This is a state where a new destination position is input and specified regardless of the value (see Figure 1), and both are 0. l.

There are two mouth position states, 2 and 3. Historically, the code in the same table is a digital code that is powered by one person in accordance with the designation of the above-mentioned 1d state (I5i number of human power ¥L', I O
This is the code input from 11).

Table 1 shows that there are 16 states that can be taken by the union υ between the previously designated position and the destination position.The numerical values in the figure are the mechanical quantities required for state conversion.For example, 1 is the position 1. The minimum amount of movement (positional movement) from 2 to 2, and the - symbol indicates that the movement is performed in a counterclockwise direction.

In the table, O on the diagonal line is the read address of the P-R record (memory) module that converts the input designation code, which does not involve movement of the movable body, into dental data inside the P-ROM circuit. Data "fljl" is a 3-bit memory address content (7 bits from 0 to 6 are data 1-1
The most significant old L7 corresponds to the sign bit for specifying the rotation direction) and is a hexadecimal code that decodes the 16 states.
The data signal of the simul code storage (darkness) and the ``scanning data pattern'' (darkness) are decile pulses that convert the data signal.The digital pulses for this conversion are sent to the subtraction counter 16 via the data line 15 on the P-R output line side. Input (additional).

However, the sign bit for designating the direction of rotation, which is the most significant bit in the data register, is connected to a separate signal line 17. In this example, the number of digital pulses of 12 fW is generated to move a small mechanical amount. The speed can be changed depending on the motor drive conditions.

In this way, the motor control circuit of the present invention compares the human power of the code specifying the movement destination with the human power of LOW 1 before the -step, and generates a digital pulse of 5 to determine the direction of rotation and the specified amount of rotation in that direction. - +10 is inputted to the subtraction counter 16 from the fact 15, and this input is sent to the motor drive circuit 18 together with the rotation direction signal line 17.

In addition, in the circuit block diagram of Figure 2, the soft register]
2 and 13. The subtraction counter 16 and the like are configured to operate in synchronization with the differential pulse of the motor drive j.

(g) Effects of the Invention According to the motor control circuit of the present invention, the calculation of the number of pulses to the destination, determination of the rotation direction, etc. are not required, and the computer processing software becomes the key. Desired morph control is possible with code designation and a simple circuit configuration.

From this point of view, the present invention has great practicality.

[Brief explanation of drawings]

FIG. 1 is a control pattern diagram for designating the movable body position. and FIG. 2 is a block diagram of a morph control circuit, but does not show an embodiment of the present invention. In the figure, 0. 1. 2. and 3 are both the movement destination specified positions, 12 and 13 are soft registers, 14 is the P-1 OM, 16 is the subtraction counter, and 17 is the data line specifying the rotation direction. Tower j prisoner rate 2 diagram

Claims (1)

[Claims] Input the specified court of the renovated destination and input it - step n
In the motor control circuit that moves one object to the specified code position by comparing the ratio and bite with the input of 1j. a shift I register into which the specified code is input; A P-ROM that converts the shift register input and the pre-step input into digital data for motor drive using a memory table for comparison and verification, and a subtraction counter that occupies the digital data of the P-ROM conversion, the counter A motor control circuit characterized in that it performs morph drive control based on the value of .