KR0148961B1 - Chuck gap control apparatus for chip mount system & its control method - Google Patents

Abstract

Apparatus and method for adjusting a gap between a suction nozzle and a chip parts supply cassette when the chip mount system adsorbs a part, the chuck gap adjusting device includes a lever for raising and lowering the head, and the lever; A feed screw for forwarding and retracting the motor, a step motor for providing forward and backward driving force to the feed screw, a control unit for controlling the step motor, a nozzle position sensor for sensing a forward and backward movement distance of the lever, and The rotation sensor is configured to detect the amount of rotation of the stepper motor. When the home sensor is turned on by moving the lever toward the -overrun sensor, various flags and parameters are displayed when the motor torque monitor signal and the slit sensor are turned on. Setting and end chuck gap adjustment, if the origin sensor is not on, move the lever in the + overrun direction when the -overrun sensor is on, and + over When the run sensor is turned on, the chuck gap adjusting device is controlled by repeating the process of moving the lever toward the overrun sensor.

Description

Chuck gap adjusting device of chip mount system and its control method

1 is a state diagram in which the component adsorption nozzle of the chip mount system is located at the adsorption station.

2 is a schematic block diagram of a chip mount system to which the present invention is applied.

3 is a schematic structural diagram of a chuck gap adjusting device.

4 is a flowchart showing a control method of the chuck gap adjusting device according to the present invention.

* Explanation of symbols for main parts of the drawings

31: lever 32: feed or

33: step motor 34: slit

35: rotation sensor 36: + overrunsen

37: home sensor 38: -overrunsen

The present invention relates to a chuck gap adjusting device of a chip mount system and a control method thereof, and in particular, a chuck of a chip mount system that adjusts the distance between a chip component and a nozzle when a chip is absorbed by a nozzle. It relates to a gap adjusting device and a control method of the initial position (origin).

The rotary chip mount system adsorbs chip components at the adsorption station through a plurality of component adsorption nozzles installed in the nozzle mounting head, transfers them to the mounting station, and transfers them to the mounting station to the printed circuit board which is supplied to the XY table. To be fitted.

1 shows a state where the component adsorption nozzle of the chip mount system is located at the adsorption station.

The part shown by the dashed-dotted line is the nozzle mounting head 1, and many adsorption nozzles 4, 4, ... are mounted through the nozzle mounting shaft 3 in it.

The suction nozzle 4 moves to the first station (part adsorption station) by the feed shaft 7 attached to the turntable (not shown) and descends to a height at which the chip component can be adsorbed, thereby adsorbing the chip component by vacuum. In the first station, the parts supply cassette 5 is positioned by the parts supply reel 6. At this time, the height of the upper part of the supply reel is different according to the method of taping the floating feed cassette and chip parts (e.g., paper fixing, enbossing, etc.). Can be adsorbed. In addition, it is also necessary to vary the height difference between the top of the part and the suction nozzle depending on the type of part. If the distance between the suction nozzle and the part is the chuk gap (CE), and this is not adjusted correctly, the part may be damaged by shocking the part when the suction nozzle 4 descends on the top of the part. If the component adsorption nozzle does not touch the top of the component, the component adsorption nozzle cannot suck the component due to the vacuum.

The present invention is to solve the above problems, the object of the present invention is a chuck gap adjusting device for adjusting the distance between the suction nozzle and the chip parts during the suction of the needle parts in the chip mount system and a method of controlling the initial position thereof To provide.

In order to achieve the above object, the device according to the present invention includes a lever for raising and lowering a head, a transfer screw for advancing and reversing the lever, a step motor for providing a forward and reverse driving force to the feed screw, and It includes a control unit for controlling the step motor, a nozzle position sensor for detecting the forward and backward movement distance of the lever, and a rotation sensor for sensing the rotation amount of the step motor, it is controlled in the following manner.

Initializing, driving the lever in the -overrun direction to determine whether the home sensor is on, and when the home sensor is on, when the motor torque monitor signal and the Motorslit light confirmation sensor are on. Wait and set various flags and parameters to the chuck gap completion state and terminate, and if the origin sensor is not on-the-go, it is determined whether the overrun sensor is on and 2 seconds have elapsed. Returning to the main program after executing the routine; if the -overrun sensor is on, reversing the step motor to move the lever in the + overrun direction, and determining whether the home sensor is on; When the sensor is in the ON state, wait for the motor torque monitor signal and the Mtorslit light confirmation sensor to be in the ON state to return various flags and parameters to the chuck gap completion state. If the home sensor is not in the ON state, the process of determining whether the home sensor is in the ON state is repeated, and if the home sensor is not in the ON state, the home sensor is in the ON state. And repeating the step of driving the lever in the -overrun direction.

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

A schematic block diagram of a chip mount system to which the present invention is applied in FIG. 2 is shown.

21 is a main control part and controls each part of the chip mount system to which the present invention is applied by a program stored in the memory. 22 is a user interface, and usually an industrial personal computer is used, and component data and control data are input through the keyboard (not shown).

Reference numeral 23 denotes a vision control unit, which receives image data from the cameras 1,2 and 3 (24), transmits the image data to the main control unit 21, and displays it on the monitor 25.

Reference numeral 26 denotes a pulse motor controller, which controls various motors in response to a control command from the main controller 21. In the present invention, a bookgap adjusting motor 27 for adjusting the chuck gap CZ is controlled.

The schematic structure of the chuck gap adjustment device is shown in FIG.

As the step motor 33 rotates, the feed screw 32 rotates.

By rotating the feed screw 32, the lever 31 moves forward and backward and moves the head block up and down. The position sensor is installed below the predetermined distance of the lever 31, and the -overrun sensor 38, the origin sensor 37, and the + overrun sensor 36 are installed from the left side. In response to the forward and backward movement of the lever 31, the dog 31a attached thereto passes through the angle sensor so that each sensor senses a position. The slit plate 34 is installed on the other axis of the step motor 33, and the slit sensor 35 is installed on the slit plate 33 so as to sense the slits formed to face each other at 180 °.

4 is a flowchart illustrating a control method of the chuck gap adjusting device according to the present invention.

In step 401, various flags and parameters, such as an origin flag and a motor status flag, are initialized. In step 402, the step motor 33 is rotated to move the lever 31 forward in the -overrun direction (the direction in which the dog 31a goes to the -overrun sensor 38).

In step 403, it is determined whether the origin sensor 37 is in an on state.

If the home sensor 37 is on, in step 404, it is determined whether the motor torque monitor signal is in the on state, and if it is not in the on state, the process continues to be repeated in step 404, and if it is in the on state, the data is set to the chuck gap in step 405. And exit the program. On the other hand, in step 403, if the origin sensor 37 is not in the on state, the process proceeds to step 06 to determine whether the -overrun sensor 38 is in the on state. If the overrun sensor 38 is not on, it is determined in step 407 whether 2 seconds have elapsed. If 2 seconds have elapsed, an error routine is executed (step 408), and the process returns to the main program.

In step 406, if the -overrun sensor 38 is on, the process proceeds to step 409 to rotate the step motor 33 in the opposite direction as before to drive the lever 31 to move backward toward the + overrun sensor 36. .

In operation 410, it is determined whether the origin sensor 37 is in an on state.

If on, go to step 404; if not, go to step 411. In step 411, it is determined whether the + overrun sensor 36 is on. If the + overrun sensor 36 is not on, the process of step 411 or less is repeated. If the + overrun sensor 36 is on, the process of step 402 or less is repeated.

As described above, according to the present invention, the suction nozzle accurately sets an initial position for properly adjusting the gap between the nozzle and the chip component when the chip component is sucked, so that the chip component is not impacted when the nozzle is lowered or the nozzle dropping interval is lowered. This excessive spreading can prevent a state where the chip component is not adsorbed.

Claims (3)

A chuckgap adjusting device of a chip mount system, comprising: a lever for raising and lowering a head, a feed screw for moving the lever forward and a reverse, a step motor for providing forward and reverse driving force to the feed screw, and a step motor; Chuck gap adjusting device of the chip mount system, characterized in that it comprises a control unit, a nozzle position sensor for detecting the forward and backward movement distance of the lever, and a slit sensor for detecting the zero degree of the step motor. The chip mount of claim 1, wherein the nozzle position sensor comprises an overrun sensor, an origin sensor, and an overrun sensor, and detects the position of the nozzle mounted on the head as a dog attached to the lever passes. Chuck Gap Adjustment System. A lever for raising and lowering the head, a feed screw for moving the lever forward and backward, a step motor for providing forward and backward driving force to the feed screw, a control unit for controlling the step motor, a forward and backward movement of the lever Initializing in a chip mount system having a nozzle position sensor for detecting the movement distance, and a rotation sensor for sensing the amount of rotation of the step motor, and whether the home sensor is on by driving the lever in the-overrun direction Determining the state, and if the home sensor is in the on state, waits for the motor torque monitor signal and the slit sensor line to be on state to set and terminate various flags and parameters to the chuck gap completion state, and If the sensor is not on, determine whether the overrun sensor is on and wait 2 seconds after not running. Returning to the in-program, and if the -overrun sensor is on, reversing the step motor to move the lever in the + overrun direction, determining whether the home sensor is on, and the home sensor is on. When the motor torque monitor signal and the slit sensor signal are in the NO state, set various flags and parameters to the chuck gap completion state and terminate.If the origin sensor is not on, the + overrun sensor is on. Repeating the process of determining whether the home sensor is in an on state when it is not in an on state, and repeating the driving of the lever in a -overrun direction when the + overrun sensor is in an on state. Chuck gap adjustment method of the chip mount system, characterized in that.