The reason why the engraving machine is not reset properly.

1. Check the engraving machine sensor for ash, poor contact or damage. Wipe the dust off the sensor and replace it if it doesn't work.
2. Check the engraving machine sensor link data line for poor contact or damage. Re-plug the data cable and see if you can't replace the data cable if you can't do it, you can only change the data cable.
3. Check that the grounding wire of the engraving machine is damaged or has poor contact. Check that the grounding wire is intact. If the grounding wire is not connected to the metal, install the grounding wire.
4. The motor line of the engraving machine is in poor contact. If this is the problem, it is relatively simple, use a multimeter to test whether the two ends are powered.