Troubleshooting for Pneumatic Marking Machine When the Needle Fails to Extend
When a pneumatic marking machine operates normally but the needle fails to extend or has a small amplitude, despite the correct travel trajectory, the following reasons and troubleshooting methods can be summarized:
1. Increased friction between the printing needle and needle sleeve.
This could be due to foreign objects such as aluminum or iron shavings from printing becoming stuck between the needle and sleeve, or excessive dryness between the needle and sleeve.
2. Compressed air from the air compressor contains oil, which reaches the O-ring of the needle sleeve through the air circuit.
Solutions:
- Step 1:Without removing the needle sleeve, apply ordinary sewing machine oil directly to the exposed needle rod. If this does not work, it may be that there is dirt stuck inside the needle sleeve. Simply remove the needle and clean it with an air can or water. The latter possibility is usually very small, and step 1 is usually sufficient.
- Step 2:Periodically drain the oil and water from the oil-water separator and unscrew the needle sleeve to clean the oil off the O-ring.
Air circuit blockage.
- The control air switch on the controller is in the off position. First, check if the air pressure value on the two-in-one air pressure gauge is 0, then remove the inlet pipe of the print head and check if the air reaches this point. Turn on the control air switch.
Phenomenon: The running trajectory of the printing needle is abnormal.
- Reasons and solutions:
- There is an error in the file input. For example, there is invisible print content outside the printing area. Strictly follow the operating instructions to rebuild the file.
- The control program is corrupted. Reinstall the control software.
- Computer hardware or other software malfunctions. Have a professional repair the computer.
- The motor control drive board in the controller is damaged. Replace the control drive board.
Due to the fast and efficient working efficiency of the marking machine, it is important to understand how to maintain it when using it. If you have any other questions about the marking machine, please feel free to contact us. We will be happy to answer your questions.