1. First of all, we can see whether the voltage fluctuates, which will affect the power supply of the router and cause the router to fail to work normally.
2, and then see if the light has passed through the engraving machine, or if the optical fiber is close to the power cord of the engraving machine, so there will be interference.
3. Finally, you can try to add a magnetic ring or filter to the engraving machine, which is good for the engraving machine.