Stenter is a device that prints solder paste or patch glue onto PCB pads through a screen. Mainly used in the electronic processing industry, printed circuit board silk screen logo, instrument shell panel logo, solder paste printing in the process of circuit board processing, etc. In the printing process, the screen printer will always have various faults, such as manual and semi-automatic all not working, the power light is on, and the printing base does not work after moving to the left. What are the common failures of the screen printing machine when it is working?
1. Do not step on the foot switch and act immediately when semi-automatic
The reason for this type of failure is mostly caused by a damaged foot switch or a short circuit caused by water in the foot switch 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 screen printing machine is working, step on the foot switch and the sliding seat will go down, and then go up again after release.
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 screen printing machine is working, step on the foot switch 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 micro switch in the foot switch is stuck and does not work, which can also cause this fault. The solution is to adjust, repair or replace the micro switch in the foot switch.
Silk printer
4. Step on the foot switch when working in semi-automatic mode, the sliding seat will drop 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. After the screen printing machine moves, the rising movement is slow by half a beat
This type of failure is that the control solenoid valve of the screen printing machine is blocked by foreign matter or the solenoid valve is faulty. The solution is to remove the solenoid valve and clean it or replace the solenoid valve.
 
Six, manual and semi-automatic all do not work, the power light is on
The reasons for this type of failure of the Flat Screen Printing Machine Factory are that the fuse on the low-voltage side of the screen printing machine 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.