The malfunction of the CCD screen printing machine may be caused by various reasons. The following are some possible reasons and corresponding analyses:

　　1. Power supply issue:

　　Check if the power cord is connected correctly and if the power plug and socket are in good contact.

　　Check if the power switch of the screen printing machine is turned on and if the fuse is blown. Power failure is one of the common reasons why equipment cannot start.

　　2. Control system issues:

　　PLC (Programmable Logic Controller) may malfunction, causing the device to be unable to receive or execute instructions.

　　Check whether the input/output point indicator lights of the PLC are normal and whether the PLC has voltage output.

　　3. Mechanical component failure:

　　The motor of the screen printing machine may be running abnormally, and the drive belt may be loose or broken, causing the equipment to be unable to move.

　　The cylinder or solenoid valve may be damaged, and the cylinder piston ring may leak air, affecting the normal operation of the equipment.

　　4. Sensor issues:

　　CCD screen printing machines are usually equipped with various sensors, such as limit sensors, position sensors, etc. If the sensor malfunctions or does not sense correctly, it may cause the device to stop running.

　　Check if the sensor is damaged, if the sensor wiring is loose, and if the sensor position is correct.

　　5. Software or program issues:

　　The control software or program of the screen printing machine may have errors or conflicts, causing the device to malfunction.

　　Try restarting the device or updating the control software to resolve the issue.

　　6. External environmental factors:

　　The device may be affected by external factors such as high temperature, humidity, and dust, which can cause damage to internal components or performance degradation.

　　Keeping the working environment of the equipment clean and suitable can reduce the impact of external environment on the equipment.

　　In general, if the CCD screen printing machine does not move, it may involve multiple factors such as power supply, control system, mechanical components, sensors, software or programs, and external environment. When troubleshooting and resolving faults, it is necessary to investigate and test them one by one according to the specific situation, in order to determine the specific cause and take corresponding measures. If you are unable to solve the problem on your own, it is recommended to contact professional maintenance personnel or equipment manufacturers for assistance.