PCBA Tech - Talk about SMT placement machine maintenance

Maintenance of smt equipment is very important. Now many companies do not pay much attention to equipment maintenance. When they are busy, they do not maintain it for a month or even a few months. Sometimes monthly maintenance is also part of weekly maintenance. This is why overseas machines are old machines more than ten years ago. The condition is still very good. People follow the standard maintenance process. Let’s see how to maintain it.

1. Check every day

(1) Before turning on the power of the placement machine, check the following items:

1. Temperature and humidity: The temperature is between 20 degree Celsius～26 degree Celsius, and the humidity is between 45～70%.

2. Indoor environment: clean air and no corrosive gas.

3. Make sure that there is no debris on the transfer rail and within the moving range of the placement head.

4. Check that there is no debris on the fixed camera and whether the lens is clean.

5. Make sure that there is no debris around the nozzle library.

6. Check whether the suction nozzle is dirty or deformed, clean or replace the suction nozzle.

7. Check whether the tape feeder is correctly placed in the material station, and make sure that there is no debris on the material station

8. Check the connection of air joints, air hoses, etc.

(2) After turning on the power of the placement machine, check the following items:

If the placement machine is in abnormal condition or running abnormally, an error message will be displayed on the display.

1. After starting the system, check whether the display of the menu screen is normal.

2. After pressing the "Servo" switch, the indicator light should turn on. Otherwise, restart after shutting down, and then turn it on again.

3. Can the emergency switch work normally?

4. Check whether the placement head can return to the starting point (source point) correctly.

5. Check if there is any abnormal noise when the placement head moves.

6. Check whether the negative pressure of the nozzles of all placement heads is within the range.

7. Check whether the PCB runs smoothly on the guide rail. Check whether the sensor is sensitive.

8. Check whether the edge positioning and needle positioning are correct. 2. Monthly inspection

(1) Clean the screen and floppy drive of the CRT

(2) X and Y axis-when the placement head is moving, make sure that there is no abnormal noise on the X and Y axis.

(3) Cable-make sure that the screws on the cable and the cable bracket are not loose.

(4) Air connector-make sure that the air connector is not loose.

(5) Air hose-check the pipes and connections. Make sure that the air hose is not leaking.

(6) X and Y motors-make sure that the X and Y motors do not heat up abnormally.

(7) Overtravel alarm-move the placement head along the positive and negative directions of the X-axis and Y-axis. When the placement head moves out of the normal range, the alarm should sound and the placement head can stop moving immediately. After the alarm, use the manual operation menu to make sure that the placement head can run.

(8) Rotating motor-check whether there are stains on the timing transmission belt and gears. Make sure that the placement head can rotate without obstacles. Ensure that the mounting head has sufficient torque.

(9) Z-axis motor-check whether the placement head can move up and down smoothly. Push up the nozzle with your finger to see if it moves smoothly. Move the placement head up and down out of the normal range respectively, and check whether the alarm can sound and the placement head can be stopped immediately.

(10) The S motor (if there is a scanning CCD) ensures that the scanning head can move smoothly.

(11) Negative pressure-check the negative pressure of all placement heads. If the negative pressure value is abnormal, clean the filter in the nozzle shaft. If the filter in the vacuum exhaust pipe is dirty (black), replace it.

(12) Transmission rail-check the movement of the transmission rail. Check the tightness of the conveyor belt. Check that there are no stains, scratches and debris on the conveyor belt. Check the automatic width adjustment of the guide rail. Check the movement when adjusting to the maximum width and the minimum width. At the entrance and exit, check the parallelism of the rails and the transmission of the PCB.

(13) PCB limiter-check its movement and noise.

(14) Side clamping, rear top block, buffer stop-check their wear.

(15) The fixture on the nozzle magazine-check for flexibility and wear.

(16) Camera-clean the lens and light box of all cameras.

(17) Camera lighting device-check its movement and brightness.

(18) Operation switch-check whether all brakes can work normally on the VO signal screen. Check the emergency stop switch.

(19) Warning lights-make sure that all lights can be on. Make sure that they are installed firmly.

(20) Danger alarms and warning alarms are checked one by one to see if they can sound.

(21) Camera-carry out "image detection".

(22) Pick-up point coordinate value-check the pick-up point coordinate value of the feeder station.

(23) smt placement position-make sure that the components can be assembled to the designated location.

The inspection should be checked, the cleanliness should be kept, the oil should be kept in the oil, and the replacement should not be replaced. Having said so much, it is nothing but to make the placement machine operate more stably and serve the enterprise more longevity And create value.