KR19980022720A - Driver bit control device and method of waveform inspection regulator - Google Patents

Abstract

The present invention relates to a control device capable of controlling the position and angle of a driver bit provided in the waveform inspection regulator of the present invention, which moves the driver bit to the adjustment position under the control of the controller and contacts the adjustment terminal to adjust the adjustment terminal. An adjustment mechanism unit, a decoder for decoding the encoder signal output from the adjustment mechanism unit and outputting data indicating position and direction, an origin sensor for detecting whether the adjustment mechanism unit is located at the origin, and the decoder and the origin under control of the controller A plurality of transfer buffers for transferring data to and from the sensor, a data bus for data transfer between the devices and the control unit, and position and direction data are inputted through the data bus and the transfer buffer to set an adjustment angle. A control unit for outputting data for controlling driving of the motor accordingly; A latch for receiving control data output from the controller through one of the plurality of transfer buffers and outputting the control data to a digital analog converter, a digital analog converter for converting the digital control data applied from the latch into an analog signal, and the analog signal. A voltage controlled oscillator for oscillating a frequency signal according to a control signal transmitted from a converter, and a circuit unit for controlling a power supplied to a DC motor in accordance with an oscillation signal output from the voltage controlled oscillator.

Description

Triberbit Control Device and Method of Waveform Inspection Regulator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform inspection regulator, and more particularly, to an apparatus and method for controlling a driver bit of a waveform inspection regulator for controlling an adjustment and a position of a driver bit for adjusting a volume adjusting terminal of an inspection target printed circuit board. will be.

In general, the waveform inspection regulator inspects the mounting state of electronic components on a printed circuit board (PCB) that is provided in video and audio equipment that is transferred through a substrate transfer conveyor and performs signal processing. Perform the volume adjustment.

1 is a block diagram showing a conventional driver bit control apparatus. The controller 11 controls the driving of the DC motor in accordance with data and setting operations input from an encoder (not shown) included in the DC motor (not shown). An ISA bus 12 which transmits input / output data to the controller 11, a timer counter 13 which receives control data of the controller 11 through the ISA bus 12 and counts adjustment time and rotational speed; A smoothing circuit 14 for removing ripples included in the output signal from the timer counter 13 and outputting the ripple to the DC motor, and outputting the output signal from the encoder (not shown) to the data bus 12; Data input / output unit (DIO) 15 is transmitted to the controller 11 through a), conventionally, the controller 11 controls the drive of the DC motor by checking the output signal of the encoder indicating the rotational speed of the DC motor It was. That is, when data on the adjustment of the adjustment component from the controller 11 through the ISA bus 12 is input to the timer counter 13, the timer counter 13 generates a pulse width modulation (PWM) according to the input data. A modulated signal is generated, which is input as a control signal to a DC motor (not shown) after the ripple signal is removed by the smoothing circuit 14.

However, in the conventional waveform inspection regulator, since only the drive of the DC motor that rotates the driver bit is simply controlled, the position is changed between the driver bit and the adjustment terminal so that accurate adjustment is not performed. There was an inconvenience in having to match the position of the terminal and the driver bit.

The present invention is to solve the above problems, the object is to automatically control the adjustment operation, position and angle of the driver bit to shorten the adjustment time, the driver bit of the waveform inspection regulator for improving the reliability of the adjustment operation To provide a control apparatus and method.

The present invention is a technical means for achieving the above object, in the apparatus for controlling the driver bit of the waveform inspection regulator, in accordance with the control of the control unit to move the driver bit to the adjustment position and to contact the adjustment terminal adjustment terminal The adjusting mechanism unit for adjusting, a decoder for decoding the encoder signal output from the adjusting mechanism unit and outputting data indicating position and direction, an origin sensor for detecting whether the adjusting mechanism unit is located at the origin, and a control signal of the controller A plurality of transfer buffers for outputting signals output from the decoder and origin sensor to the data bus and transferring the data input from the data bus to the decoder, a data bus for data transfer between the devices and the control unit, the data bus and The position and direction data is input through the transfer buffer. A control unit for setting an angle and outputting data for controlling the driving of the motor according to the present invention; a latch for receiving control data output from the control unit through one of the plurality of transfer buffers and outputting the data to the digital analog converter; A digital analog converter for converting digital control data applied from the analog signal to an analog signal, a voltage controlled oscillator for oscillating a frequency signal according to a control signal transmitted from the analog converter, and a DC motor according to an oscillation signal output from the voltage controlled oscillator. Characterized in that the circuit portion for controlling the power supplied to.

1 is a block diagram showing a conventional driver bit control apparatus.

2 is a block diagram showing a driver bit control apparatus according to the present invention.

3 is a structural diagram schematically showing the configuration of the adjustment head mechanism shown in FIG.

4 is a block diagram showing a driver bit control operation according to the present invention.

5 is a timing diagram showing the output pulses from the encoder shown in FIG.

Explanation of symbols for main parts of the drawings

21: adjusting mechanism 22: decoder

23 to 27: Buffer 28: Home sensor

29: data bus 30: control unit

31: Latch 32: Digital Analog Converter (DAC)

33: voltage controlled oscillator (VCO)

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of an embodiment of the present invention.

2 is a block diagram showing the configuration of a driver bit control apparatus according to the present invention, wherein an adjustment mechanism unit having a mechanism for moving the driver bit to an adjustment terminal position under the control of the controller 30 to adjust the adjustment terminal ( 21, a decoder 22 for decoding the encoder signal output from the adjustment mechanism 21, and a first buffer 23 for transferring the position counter data output from the decoder 22 to the data bus 29. And a second buffer 24 for transmitting the direction information output from the decoder 22 to the data bus 29, and a CLEAR signal applied from the data bus 29 to the decoder 22. A third buffer 25, an origin sensor 28 for detecting whether the driver bit of the adjustment mechanism 21 is located at the origin (reference position), and a detection signal output from the origin sensor 28 for the data bus ( Between the fourth buffer 26 and each device, The control unit 30 receives data from each of the buffers 23 to 27 via the data bus 29 for transmitting data and the data bus 29 and controls the operations of the plurality of buffers 23 to 27. And, the fifth buffer 27 for transmitting the control data applied from the data bus 29 in accordance with the control signal of the control unit 30, the latch 31 for transmitting through the fifth buffer 27, Oscillates a predetermined frequency signal in accordance with a digital analog converter (hereinafter referred to as DAC) 32 for converting data, which is a digital signal input from the latch 31, into an analog signal, and an analog control signal output from the DAC 32. DC power supply terminal of the voltage controlled oscillator (VC0) 33 and the DC motor 38 , ) And a DC power supply (VC) provided between the power supply (VCC) terminal of the motor power supply (not shown) and applied to the motor 38 by an on / off operation according to a frequency signal applied from the voltage controlled oscillator 33. It has a resistor (R) and a capacitor (C) and a transistor (Q1) connected in parallel to control.

3 is a structural diagram showing a schematic configuration of the adjusting mechanism 21 shown in FIG. 2, and the servo motor 35 driving the XY table 34 and the XY table 34 in the X and Y axis directions, respectively. And a support member 36 fixed to the XY table 34 to support a driver bit and a motor, and a pulse signal connected to the support member 36 to detect the rotational speed and direction of the motor. Under the control of the encoder 37 and the control unit 30, the power source (from the collector-emitter of the transistor Q) , And a driver bit 39 connected to the rotating shaft of the DC motor 38 and integrally rotating during the rotation operation of the DC motor 38.

3 is a flowchart showing a method of controlling the position and speed of a driver bit according to the present invention.

Next, the operation of the present invention by the above configuration will be described in detail.

First, the operation of the adjustment mechanism 21 will be described with reference to FIG. 3, where the XY table 34 is fixed at the predetermined position by the drive of the AC servomotor 35 under the control of the controller 30. The support member 36 is moved. Thereby, the integral encoder 37, motor 38, and driver bit 39, which are connected to the support member 36, are moved to an adjustment position (upper part of the corresponding adjustment terminal). Then, the cylinder provided in the support member 36 is lowered to bring the driver bit 39 into contact with the adjustment terminal. Then, the DC motor 38 moved to the adjustment position by the XY table 34 is driven by the control of the controller 30 to rotate the driver bit 39 coupled to the lower portion of the DC motor, An encoder 37 connected to an upper portion of the rotary shaft of 38 outputs output signals A, B, and Z indicating the rotational speed and direction of the DC motor 38. The output signal from this encoder 37 is shown in the timing diagram of FIG. The A output signal and the B output signal are the A and B channel signals provided on the rotating disk of the encoder (for example, an optical encoder) to detect the rotation speed and the rotation direction of the DC motor 38, and the Z output. The signal is an origin signal and indicates a reference position of the DC motor 38. For example, as shown in FIG. 5, the A output signal and the B output signal are different in phase with the same frequency. When the phase of the A output signal precedes the phase of the B output signal, the DC motor 38 is used. Is a state in which the motor rotates in the clockwise direction, and when the phase of the A output signal is behind the phase of the B output signal, the DC motor 38 is rotated in the counterclockwise direction. The rotation speed of the DC motor 38 is represented by the number of pulses per unit time in the A or B output signal. The high level signal section of the Z output signal represents the origin of the DC motor 38.

As described above, the three signals A, B, and Z output from the encoder 37 are input to the decoder 32 shown in FIG. 2, which decodes the phases of the A and B signals among the three input signals. In comparison, the rotation direction is detected, and the position (ie, angle) of the driver is detected by combining the Z output signal and the A or B output signal. The position data output from the decoder 22 is output to the data bus 29 through the first buffer 23 for transmitting or blocking data according to the control signal of the control unit 30, and through the data bus 29 It is input to the controller 30. In addition, the direction data output from the decoder 22 is transferred to the data bus 29 through the second buffer 24 under the control of the control unit 30 to transmit or block, and from the data bus 29 to the control unit ( 30). The win point sensor 28 detects whether the DC motor 38 is at the origin, and outputs the result to the controller 30 through the fourth buffer 26 and the data bus 29.

The controller 30 outputs a clear signal to the decoder 22 via the data bus 29 and the third buffer 25 at the start of the adjustment operation, whereby the decoder 22 is reset. In addition, the controller 30 may output the output data (position and direction data) of the decoder 22 and the fourth buffer 26 and the first and second buffers 23 and 24 and the data bus 29. The power supplied to the DC motor 38 is controlled according to the output signal of the origin sensor 28 input through the data bus 29. That is, the control data output from the control unit 30 to the data bus 29 through the fifth buffer 27 is input to the latch 31, and then applied to the DAC 32 to be converted into an analog signal. And this analog control signal is input to the voltage controlled oscillator 33 as a control signal, the voltage controlled oscillator

The oscillation frequency of (33) is adjusted. Thus, the frequency signal oscillated by the voltage controlled oscillator 33 is applied to the base of the transistor Q1, and the transistor Q1 is conducted so that the power supply voltage from the motor power supply (not shown) is supplied to the direct current motor 38. of , In this case, the DC motor 38 is driven.

A series of adjustment operations using the driver bit control device of the waveform inspection regulator operating as described above will be described with reference to FIG.

In FIG. 4, first specifying the origin speed data of the motor (401). The control unit 30 accordingly controls the DC motor 38 to be at the home position by rotating the DC motor 38 at the origin moving speed specified in step 401. Then, it is checked whether the home sensor 28 is turned on (303), the home sensor 28 checks whether the motor is located at the home position, by the step 402 the motor is moved to the home position When turned on, it is turned on. Therefore, when the motor is located at the home position, that is, when the home sensor is turned on, the angle information of the adjustment part is set in accordance with the inspection waveform of the printed circuit board to be inspected (404), and the decoder 22 is cleared to operate. Initialize (405). Then, the angle moving speed data is designated according to the angle information of the adjusting part (406), and the control signal according to the angle moving speed data specified in the step 406 is applied to the DC motor 38 to supply the motor. Drive (407), read the encoder signal currently output from the encoder (37) by motor driving under the control of the step (407), and decode the encoder signal read in the step (408). In operation 409, the data indicating the movement angle of the DC motor 38 is converted.

Then, it is checked whether the angle data converted in step 409 is the same as the target data (i.e., data set by the adjustment information) (410), and the motor is driven until it becomes the same. When the same data is output from the encoder 37, the motor is stopped (411). This completes the volume adjustment by the driver bit.

Thus, the driver bit control apparatus and method of the waveform inspection regulator according to the present invention has the effect that the driver bit adjustment operation and the position control can be performed, and thereby, the adjustment time is shortened and the adjustment operation is improved in reliability. There is an excellent effect that can be made.

Claims (3)

An apparatus for controlling a driver bit of a waveform inspection regulator, comprising: an adjusting mechanism portion for moving the driver bit to an adjusting position, contacting the adjusting terminal, and rotating the screw to adjust the adjusting terminal under control of a controller; A decoder which decodes an encoder signal and outputs data indicating position and direction, an origin sensor for detecting whether the adjustment mechanism is located at the origin, and a signal output from the decoder and the origin sensor according to a control signal of a controller to a data bus. A plurality of transfer buffers for outputting and transferring data input from the data bus to the decoder, a data bus for data transfer between the devices and the control unit, and receiving and adjusting position and direction data through the data bus and transfer buffer To set the angle and drive the motor accordingly. A control unit for controlling, a latch for receiving control data output from the control unit through the buffer among the plurality of transfer buffers and outputting them to the digital analog converter, and a digital analog for converting the digital control data applied from the latch into an analog signal. A converter, a voltage controlled oscillator for oscillating a frequency signal according to a control signal transmitted from the analog converter, and a circuit unit for controlling power supplied to a DC motor according to an oscillation signal output from the voltage controlled oscillator Driver bit control device of the waveform inspection regulator. 2. The apparatus of claim 1, wherein the adjustment mechanism unit comprises an XY table comprising X and Y axes movable in accordance with a control signal of the controller, two servomotors for moving the X and Y axes of the XY table in accordance with the control signal of the controller, A support member fixed to an XY table for supporting all the devices of the adjustment mechanism, an encoder connected to the rotational shaft of the DC motor to output a pulse signal indicating the rotational speed and the rotational direction and origin according to the rotation of the DC motor; And a direct current motor for rotationally driving at a speed and a direction according to the adjustment information of the adjustment terminal under the control of the control unit to drive a driver bit connected to one axis thereof. A method of controlling a driver bit of a waveform inspection regulator, the method comprising: controlling a DC motor for driving a driver bit to be moved to an origin position, setting angle information of an adjustment part, initializing each device, and setting adjustment information Driving a DC motor connected to the driver bit, reading the encoder signal generated according to the motor driving, converting the angle data into angular data, and comparing the angular data converted in the step with the set data. And a step of stopping the motor if it matches in the comparing step and controlling the motor to continue driving if it does not match. Control method.