KR0148960B1 - Reel shaft far point control apparatus for chip mount system & its control method - Google Patents

Abstract

A reel shaft origin adjusting device for precisely adjusting the origin of a reel shaft of a chip mount system, and a control method thereof. The servo motor (1) applies a rotational force to the reel shaft to move forward and backward, and rotates according to the rotation of the servo motor (1). An encoder 2 for generating a sensing pulse signal, a controller 4 for receiving a rotation sensing pulse signal output from the encoder 2 and outputting a control signal according to the signal, and a control signal from the controller 4 A servo motor driver 3 for driving the servo motor 1, a dog 6 attached to the reel shaft and moving forward and backward in accordance with the forward and backward movements of the reel shaft, and sensing the passage of the dog 5 The + overrun sensor 8, the origin sensor 1, and the-overrun sensor 6 for outputting a detection signal to the controller 4 are configured.

Description

Reel axis home position adjusting device of chip mount system and its control method

1 is a block diagram of a reel shaft origin adjustment device according to the present invention.

2 is a flowchart showing a control method of the reel shaft origin adjustment device according to the present invention.

3 is an installation state diagram of a cassette misalignment sensor.

4 is a block diagram of a rotary chip mounter.

5 is a state diagram in which parts by the component supply tape are supplied to the adsorption station.

(A) and (b) are the state diagrams adsorbed by the nozzle of a component.

* Explanation of symbols for main parts of the drawings

1: Servo Motor 2: Encoder

3: servo motor drive unit 4: control unit

5: dog 6: overrun sensor

8: + overrun sensor 9: Home sensor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip mount system, and more particularly, to a reel shaft home position adjusting device for precisely adjusting the origin of a reel shaft and a control method thereof.

In the chip mount system, the chip parts are supplied to the adsorption station position from the parts supply cassette, the parts supply tray, or the like, are adsorbed by the adsorption nozzle, and then mounted on the printed board at the mounting station position.

4 is a block diagram of a rotary chip mounter. The component supply cassette 45 is provided with a component supply reel in which a component supply tape with chip components is wound therein, and a plurality of reel shafts 44 are placed in parallel to supply components to the suction nozzle.

At this time, the reel shaft 44 moves the parts supply cassette 45,... To the left and right to be sucked by the suction nozzle of the first station 46. The turntable 41 includes a plurality of stations 43, 46 ..., and picks up a component at the first station 46, and recognizes an image of the component at the third image recognition station 43. The recognized image is processed and used as mounting data for subsequent component mounting, and the operations of suction position correction, suction angle correction, presence / absence of chips and bad judgment are performed before mounting in the mounting station 47. The image recognition unit processes the component adsorbed by the nozzle to obtain the distance of the component's center (Oe) from the camera center and the twisted angle of the component, and mounts the component on the printed board (not shown) located on the XY table 42. In order to compensate the component mounting position and mounting angle, the adsorption position correction values X and Y and the adsorption angle correction value θ are obtained.

5 shows a state in which parts are supplied to the adsorption station by the component supply tape 52. The length of the Y-direction component supply center line 54 and the left side of the supply tape 52 is X, and the position 53 at which the suction nozzle adsorbs the component is indicated by a lattice pattern. As described above, when the chip component is supplied by the component supply data 52 or the component supply tray, the suction nozzle is sucked at the center of the component to obtain the best operation. As shown in FIG. It may also be the cause of chip detection failure in the image recognition station 43, vertical chips, and the like. That is, when the suction nozzle is far beyond the Y-direction component supply center line 54, the component may not be adsorbed, and when the component is adsorbed as shown in FIG. 6 (a), the turntable 41 mounts the nozzle. While moving to the position 47, the left and right weights relative to the center of the nozzle (Z axis) may be lost and the parts may be lost due to the influence of mechanical vibration.

If the component is adsorbed as shown in FIG. 6 (b), it is determined that the component is defective during the image recognition process. Therefore, even a good component may be discarded. Mounting is poor because the components are placed vertically or bounced off.

In order to prevent the adsorption failure state as described above, the adsorption of the parts should be made in a state where the reel shaft and the nozzle shaft are correctly adjusted.

The present invention is to solve the above problems, an object of the present invention is to reel shaft origin of the chip mount system for adjusting the origin of the reel shaft initial position of the chip mount system so that the correct operation of the suction nozzle and the reel shaft during component adsorption It is to provide an adjusting device and a control method thereof.

In order to achieve the above object, an apparatus according to the present invention is a servo motor for applying a rotational force to the reel shaft to move forward and backward, an encoder for generating a rotation sensing pulse signal in accordance with the rotation of the servo motor, the rotation output from the encoder A control unit which receives a sense pulse signal and outputs a control signal according to the signal, a servo motor driving unit which receives the control signal from the control unit and drives the servo motor, and is attached to the reel shaft to move forward and backward according to the forward and backward movements of the reel shaft. It is composed of a dog reversing, a + overrun sensor, an origin sensor, and a-overrun sensor for detecting the passage of the dog and outputs a detection signal to the controller.

The apparatus may further include initializing a reel axis related variable, moving the reel axis toward the overrun sensor, determining whether the left cassette misalignment sensor is in an on state, and when the left cassette misalignment sensor is in an on state, Move the reel axis to the + overrun sensor until the + overrun sensor is on, display an error message and stop the reel axis, and if the left cassette wrong mounting sensor is not on, check if the -overrun sensor is on. Judging, moving the reel shaft to the + overrun sensor in the on state, determining whether the home sensor is on; if not, determining whether the home sensor is on and the home sensor is on If not, repeat the step of moving the reel axis toward the over-run sensor, and if the home sensor is in the ON state, setting the reel axis-related parameters It is controlled by the method.

Hereinafter, the present invention will be described in detail with reference to the drawings.

In Fig. 1, a block diagram of the reel shaft origin adjustment device according to the present foot is shown.

The reel shaft adjusting apparatus according to the present invention includes a servo motor (1) for applying a rotational force to the reel shaft to move forward and backward, an encoder (2) for generating a rotation sensing pulse signal in accordance with the rotation of the servo motor (1), and the encoder. A control unit 4 which receives the rotation sensing pulse signal output from (2) and outputs a control signal according to the signal; and a servo motor driving unit which receives the control signal from the control unit 4 and drives the thermovotor 1 ( 3) and + overrun attached to the reel shaft and detecting the passage of the dog 6 and the dog 5 which move forward and backward according to the forward and backward movements of the reel shaft and outputting a detection signal to the controller 4. Sensor 8, origin sensor 1, and -overrun sensor 6.

The reel shaft adjusting device configured as described above advances the reel shaft 44 to the left according to the clockwise rotation of the servomotor 1 and to the right according to the counterclockwise rotation. As the dog 5 passes through the + overrun sensor 8, the origin sensor 9, and the-overrun sensor 6 according to the forward and backward of the reel shaft 44, a detection signal is output from each sensor to control the controller 4. Is entered.

The control unit 54 receives the detection signal according to the movement of the reel shaft 44 input from each sensor to move the reel shaft 44 forward and backward a predetermined distance.

2 is a flow chart showing a control method of the reel shaft origin adjustment device according to the present invention.

In step 201, the reel axis related variables such as the origin flag, the current position of the reel axis, the next position of the reel axis, and the stop flag are initialized. In step 202, the reel shaft 44 is moved toward the overrun sensor 6, and in step 203, it is determined whether the left cassette misfit sensor 33a is on. 3 shows an installation state of a cassette misfit sensor. The cassette misalignment detecting plates 32a and 32b are disposed below the left and right of the suction nozzle 31 at a distance d shorter than the position at the time of movement of the reel shaft of the suction nozzle 31, and the detection plates 32a and 32b are disposed. Cassette misalignment detection sensors 33a and 33b are installed at a predetermined distance near 32b). If cassette misalignment detection plates 32a and 32b come into contact with an incorrectly mounted cassette 45 ', cassette misalignment detection is detected. When the distance between the plates 32a and 32b and the cassette misalignment detection sensor 33a and 33b changes, the cassette misalignment detection sensor 33a and 33b detects and outputs the changed distance to the control unit 4. 4) stops the movement of the reel shaft 44, and prevents the nozzle 31 from being damaged by colliding with the nozzle 31 and the wrong mounting cassette 45 '.

If the left cassette wrong mounting sensor 33a is on, in step 208, the servomotor 1 is stopped and driven again to move the reel shaft 44 toward the + overrun sensor 8, and in step 209, the + overrun sensor It is determined whether (8) is on. If it is not on, the reel shaft 44 is continuously moved toward the + overrun sensor 8 by repeating step 208, and if it is on, an error message is displayed (not shown) in step 210 and the reel shaft 44 is stopped.

If the left cassette wrong mounting sensor 33a is not on, it is determined in step 204 whether the -overrun sensor 6 is on. If not, proceed to step 206; if on, in step 205, for example, move 17 mm in the + overrun sensor 8 direction. That is, when the reel shaft 44 moves toward the -overrun sensor 6 and the -overrun sensor 6 is turned on, the reel shaft 44 is overrun because the dog 5 has passed the origin sensor 9. Since the home sensor 9 cannot be turned on by moving in the direction of the sensor 6, -overrun sensor 8 must be moved in the + overrun sensor 8 direction longer than the interval between the overrun sensor 6 and the home sensor 9 -overrun direction again. This is because the home sensor 9 can be found by moving to.

In step 206, if the origin sensor 9 is on and the signal of the encoder 2 determines the 0 ° of the servomotor 1, and if it is not in the on state, the process of step 202 or less is repeated, and In this state, the reel axis related variable is set to the reel axis home position completion state (step 207), and the program is terminated.

As described above, according to the present invention, by accurately adjusting the reel shaft origin of the chip mount system, it is possible to prevent component adsorption defects caused by the adsorption nozzle and the component supply cassette not being accurately positioned during component adsorption.

Claims (2)

In the chip mount system, a servo motor 1 for applying a rotational force to the reel shaft to move forward and backward, an encoder 2 for generating a rotation sensing pulse signal according to the rotation of the servo motor 1, and the encoder 2 A control unit 4 receiving the rotation monitoring pulse signal output from the control unit and outputting a control signal according to the signal, a servo motor driving unit 3 receiving the control signal from the control unit 4 and driving the servo motor 1; A dog 5 attached to the reel shaft to move forward and backward according to the forward and backward movements of the reel shaft, and a + overrun sensor configured to detect the passage of the dog 5 and output a detection signal to the controller 4; 8) a reel shaft home position adjusting device comprising a home sensor (9) and an overrun sensor (6). A chip mount system comprising the steps of: initializing a reel axis related variable, moving the reel axis toward the overrun sensor, determining whether the left cassette misalignment sensor is on, and the left cassette misalignment sensor is on. Move the reel shaft to the + overrun sensor until the + overrun sensor is turned on to display an error message and stop the reel shaft; and if the left cassette wrong mounting sensor is not on, is the -overrun sensor on? If it is in the on state, the reel axis is moved to the + overrun sensor, and if the home sensor is in the on state, and if it is not in the on state, the home sensor is in the on state. If not, repeat the step of moving the reel axis toward the overrun sensor, and if the home sensor is on, setting the reel axis-related parameters Control method of the reel shaft origin adjustment device characterized in that it comprises.