A flat screen printer is a device that prints solder paste or patch glue onto the PCB pads through the screen. Mainly used in the electronic processing industry, printed circuit board silkscreen logo, instrument shell panel logo, solder paste printing in the process of circuit board processing, etc. Flat screen printers always have various problems in the printing process, such as manual and semi-automatic all not working, the power light is on, the printing base does not work after moving to the left, etc. What are the common failures of a flat screen printer when working?
1. Do not step on the footswitch and act immediately when semi-automatic
The reason for this type of failure is mostly caused by a damaged footswitch or a short circuit caused by water in the footswitch socket. The other is a problem with the manual start button switch. The repair method is to replace the new switch, socket, button switch, or disassemble and repair the related damaged parts.
2. When the semi-automatic flat screen printer is working, step on the footswitch to lower the sliding seat, and then rise again
This phenomenon is generally caused by damage or disconnection of the proximity switch on the left side of the horizontal slide. The solution is to replace the proximity switch or connect the switch connection.
3. When the semi-automatic flat screen printer is working, step on the footswitch and the vertical sliding seat will drop, and the printing seat will not move after it moves to the left.
The reason for this kind of failure is that the proximity switch on the left side of the sliding seat is not sensed or there is a problem. The solution is to adjust the sensing point of the left proximity switch or replace a good proximity switch; and the microswitch in the footswitch is stuck and does not work, which can also cause this fault. The solution is to adjust, repair or replace the microswitch in the footswitch with a new one.
flat screen printer
4. Step on the footswitch when working in semi-automatic mode, the sliding seat will fall and move left and then rise but not right
This phenomenon occurs because the proximity switch on the upper left of the vertical sliding seat is not sensed or there is a problem with the proximity switch. The solution is to adjust the upper proximity switch induction or a better proximity switch.
5. The flat screen printer rises slowly after switching.
This type of failure is that the flat screen printer control solenoid valve is blocked by foreign matter or the solenoid valve is faulty. The solution is to remove the solenoid valve to clean or replace the solenoid valve.
Six, manual and semi-automatic all do not work, the power light is on
The cause of this type of failure is that the low-voltage side fuse of the flat screen printer is blown, no air source enters, and all the solenoid valves are faulty. The solution is to change the low-voltage side fuse and check whether the pressure reaches 4-7kg/cm. All the solenoid valves have very small faults, and most of them are disconnected.