KR0159584B1 - Pitch transfer control circuit - Google Patents

Abstract

The present invention relates to a pitch feed control circuit for reducing the motor stop delay time to enable accurate pitch transfer, comprising: a drive signal generator for operating a motor, a stop signal generator for temporarily stopping during operation of the motor; And a pitch sensing unit including a sensor for detecting whether the pitch movement is performed correctly, a motor monitoring unit for receiving a signal from the pitch sensing unit and monitoring a malfunction of the motor, and outputs of the driving signal generating unit and the pitch sensing unit. The OR gate selectively outputs an operation signal of the motor, an AND gate receiving the stop signal generator and the OR signal, and an output signal of the AND gate. And a power coupler to determine the operation of the motor by inputting through the INVERTER), and apply power to the motor according to the output signal of the power coupler. That was before the operation is accurate feeding of the pitch by the motor consists of a drive unit to directly control the motor at a pitch detection section output signal is possible to improve the productivity of the automated equipment that is characterized.

Description

Pitch feed control circuit

1 is a diagram showing a general board catch.

2 is a view showing a state in which the board is stacked on the board piled up.

3 is a diagram showing a motor connection of a board catcher.

4 is a diagram showing a state after an ideal pitch feed.

5 is a flowchart showing an operation according to the prior art.

6 is a view showing a state after the conventional pitch drop.

7 is a diagram showing a state after the conventional pitch increase.

8 is a circuit diagram of a pitch feed control circuit according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: drive signal generator 11: the first photo coupler

12: first inverter 20: stop signal generator

21: first photo coupler 22: second inverter

23: third inverter 30: pitch detection unit

31: fourth inverter 40: motor monitoring unit

41: fifth inverter 42: latch circuit

43: third photocoupler 44: the sixth inverter

45: fourth photo coupler 46: fifth photo coupler

47: 7th inverter 50: OR gate

60: AND gate 70: INVERTER

80: power coupler 90: motor drive unit

110: conveyor 120: chain

130: motor 131: first power relay

132: second power relay 140: board latch

150: latching rod 160: sensor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pitch transfer control circuit, and more particularly, to a pitch transfer control circuit which is applied to a board catching operation to remove a motor stop delay time and to enable accurate pitch transfer.

In general, the board stacking is driven by a conveyor 110 for transferring a board, a chain 120 for loading a board moved by the conveyor 110, and the chain 120 as shown in FIG. It is configured to include a motor 130 for raising the stacked board.

As shown in FIG. 2, a board latch 140 for supporting a board is attached to the chain 120 by a latch connecting rod 150, and the latch connecting rod 150 is disposed at a position opposite to the latch connecting rod 150. A sensor (160 in FIG. 4) is mounted to detect the movement of 150. FIG.

As shown in FIG. 3, two power relays 131 and 132 are used for the motor 130 as switches for driving and turning the motor. At this time, the coil part of the first power relay 131 is connected to the controller side, and the contact part is connected to the motor drive switch. In addition, the coil portion of the second power relay 132 is connected to the controller side, the contact portion is connected to the direction change switch of the motor.

The board catcher configured as described above, when the board is transported by the conveyor 110 and the board is placed on the board latch 140 of the chain 120, the controller outputs an operation signal of the motor 130 to rotate. In response to the rotation of the motor 130, the chain 120 is driven and the board is stopped by outputting a stop signal of the motor 130 when the board is raised by a certain height, that is, by one pitch. In this case, as shown in FIG. 4, the clasp connecting rod 150 of the chain 120 and the sensor 160 maintain a horizontal relationship before and after driving of the chain 120.

As shown in FIG. 5, the pitch transfer control method according to the related art includes a first process of checking whether a board is inserted into the chain 120 and the motor (if the board is inserted in the first process). A second process of rotating the motor by applying power to the 130; a third process of operating a timer to measure a time at which the rotation of the motor 130 is performed; and a fourth process of checking whether the timer has elapsed for a predetermined time And a fifth process of checking whether the sensor 160 is turned on when a predetermined time elapses in the fourth process, and the sensor 160 is turned on in the fifth process. If it is determined that the determination is made to the sixth step of stopping the motor 130.

The pitch transfer control method according to the related art as described above has a delay time until the motor is completely stopped because the controller outputs the stop signal of the motor 130 after receiving the signal from the controller 160 by software. This happens. Accordingly, when the pitch of the chain 120 is lowered, as shown in FIG. 6, the latch connecting rod 150 is lowered by a predetermined distance than the sensor 160, and when the pitch is increased, FIG. As shown in FIG. 3, there is a problem in that the clamp connecting rod 150 is raised by a predetermined interval more than the sensor 160 so that accurate pitch transfer is impossible.

In addition, due to the delay time, the narrower the gap between the boards, the more errors there is a problem in reducing the productivity in the automation equipment.

The present invention has been made to solve the above problems, the output of the sensor for detecting the movement of the pitch is transmitted to the motor directly from the circuit to control the motor operation without passing through a controller operated by software to control the motor operation It is an object of the present invention to provide a pitch feed control circuit that can eliminate the necessary delay time.

Pitch feed control circuit according to the present invention for achieving the above object is made of a drive signal generator for operating the motor, a stop signal generator for temporarily stopping during operation of the motor, the pitch movement is made accurately Selecting the operation signal of the motor according to the output of the pitch detection unit including a sensor for detecting whether the sensor, a motor monitoring unit for receiving a signal of the pitch detection unit to monitor the malfunction of the motor, and the output of the drive signal generator and the pitch detection unit An OR gate to be outputted to the AND gate, an AND gate receiving the stop signal generator and an OR signal, and an output signal of the AND gate through an inverter. It consists of a power coupler to determine the operation of the motor drive unit for rotating the power by applying power to the motor in accordance with the output signal of the power coupler. The accurate transfer of the pitch by that directly control the motor at a pitch detection section output signal characterized in that it is possible.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the pitch transfer control circuit according to the present invention will be described in detail.

According to the present invention, as shown in FIG. 8, the drive signal generator 10 for operating the motor of the board catcher, the stop signal generator 20 for temporarily stopping the motor, and the pitch movement Pitch detecting unit 30 for sensing, the motor monitoring unit 40 for monitoring the malfunction of the motor by receiving the signal of the pitch detecting unit 30, the drive signal generator 10 and the pitch detecting unit 30 OR gate 50 receiving the output of the signal, AND gate 60 receiving the output signal of the stop signal generator 20 and the OR gate 50, and the AND gate ( Power coupler 80 that receives the output signal of the 60 through the inverter (INVERTER) 70 to determine the rotation and rotation direction of the motor, and the motor driving unit 90 that operates in accordance with the output signal of the power coupler 80 It is composed of

The driving signal generator 10 may invert a state of a first photocoupler 11 outputting a low signal when the driving signal is generated and an output signal of the first photocoupler 11. It consists of a first inverter 12.

The stop signal generator 20 may invert the state of the output signal of the second photocoupler 21 and the second photocoupler 21 to output a low signal when a stop signal is generated. The second inverter 22 and the third inverter 23 for inverting the state of the output signal of the second inverter 22 are configured.

The pitch detecting unit 30 is composed of a sensor 160 for detecting the position of the latch connecting rod 150 according to the transfer of the pitch, and a fourth inverter 31 for inverting the output signal of the sensor 160. And outputs a low when the sensor 160 is on, and a high output when the sensor is off.

The motor monitoring unit 40 is connected to the controller according to the output signal of the fifth inverter 41 and the latch circuit 42 and the fifth inverter 41 receives the output signal of the sensor 160 to the sensor ( A third photocoupler 43 for outputting the state of 160, a sixth inverter 44 for inverting the output signal of the latch circuit 42, and an output signal of the sixth inverter 44 to the controller. A fourth photocoupler 45 for outputting the state of the latch circuit 42, a fifth photocoupler 46 for outputting a low when a latch clear signal is input from the controller, and the fifth photocoupler ( And the seventh inverter 47 which inverts the output signal of the input signal 46 and inputs it to the reset terminal of the latch circuit 42.

The latch circuit 42 is composed of an R-S flip-flop.

The power coupler 80 is configured to stop the motor driver 90 when a high signal is input, and to operate the motor driver 90 when a low signal is input.

The inverters included above perform a function of synchronizing a signal or inverting a state and have a processing time equal to a time delayed in a logic element.

In the present invention configured as described above, the drive signal and the stop signal are initially in an off state, and the sensor 160 is in an on state, so that the drive signal generator 10 is low. The stop signal generator 20 is high, the pitch detector 30 is low, the OR gate 50 is low, and the AND The gate 60 outputs a low, and the output signal of the AND gate 60 is inverted in the inverter 70 so that a high is input to the power coupler 80 so that the motor driver 90 remains stationary.

Thereafter, when the board is pulled in, the driving signal is turned on, and the output signal of the driving signal generator 10 becomes high, and the output signal of the oragate 50 becomes high. When a low is input to the power coupler 80, the motor driving unit 90 operates to rotate the motor.

When the chain 120 is driven according to the rotation of the motor and the board is raised by a predetermined height, the sensor 160 detects the latch connecting rod 150 and turns it on. Accordingly, the pitch detecting unit 30 stops the motor driving unit 90 by outputting a low so that a high is input to the power coupler 80.

At this time, the controller receives the output signal of the third photocoupler 43 and the output signal of the fourth photocoupler 45 to determine the state of the sensor 160 to monitor the motor malfunction and then latch. The latch circuit 42 is reset by outputting a clear signal.

The stop signal generator 20 outputs a low when an emergency stop is required while the motor is being driven so that a high is always input to the power coupler 80 so that the motor driver 90 can be input. Stop it.

The pitch transfer control circuit according to the present invention constructed and operated as described above directly controls the power coupler with the output of the sensor and the output of the signal generator, thereby avoiding the controller, thereby shortening the processing time and enabling accurate pitch transfer. In addition, since errors such as board jams are eliminated according to the exact pitch movement, the productivity of the automation equipment is improved.

Claims (4)

A pitch detecting unit including a driving signal generating unit for operating the motor, a stop signal generating unit for temporarily stopping during operation of the motor, a sensor for detecting whether the movement of the pitch is made correctly, and the pitch detecting unit A motor monitoring unit for receiving a signal and monitoring a malfunction of the motor, an OR gate for selectively outputting an operation signal of the motor according to the output of the driving signal generating unit and the pitch detecting unit, the stop signal generating unit and the ora An AND gate that receives an output signal of an (OR) gate, a power coupler that receives the output signal of the AND gate through an inverter, and determines a motor operation, and an output signal of the power coupler Pitch feed control circuit comprising a motor drive unit for rotating the operation by applying power to the motor. The inverter of claim 1, wherein the driving signal generating unit and the stop signal generating unit are turned off at the moment of generating the signal and output a high, and an inverter for inverting the state of the output signal of the photocoupler. and a pitch feed control circuit comprising: an inverter. The sensor of claim 1, wherein the motor monitoring unit comprises: a first inverter and a latch circuit for receiving an output signal of the sensor, a first photocoupler for outputting a state of the sensor to a controller according to an output signal of the first inverter; A second inverter for inverting the output signal of the latch circuit, a second photocoupler for outputting the state of the latch circuit to the controller according to the output signal of the second inverter, and low when a latch clear signal is input from the controller. And a third inverter for inverting the output signal of the third photocoupler and inputting the third photo coupler to the reset terminal of the latch circuit. The pitch transfer control circuit of claim 1, wherein the latch circuit is formed of an R-S flip-flop.