Why is the top bad limit switch when the engraving machine starts resetting:
1. The top of the jack is less than the limit switch, and it can be corrected.
2. The drive line is not in good contact. Try to fix the drive line firmly.
3. The limit switch line is not connected, and the line can be connected.
4, the limit switch is broken, you can change it.
When the engraving machine starts, the liquid display block does not display or display garbled characters:
1. First check if the handle wire is connected properly. If the cable is connected, it can be reconnected.
2. Connect the handle wire directly to the liquid display block to see if it is normal. If it is normal, the intermediate transfer cable can be replaced.
3. Open the control cabinet to check if the interface board is loose. If the interface is loose, insert it tightly.
4, the liquid display block is bad, you can change it.