1. Restore factory settings>>.
2. Unplug the limit switch from the mainboard. (as shown)

If the axes start to move as usual, then the limit switches are faulty; replace them with new, identical ones.

If they remain inactive, check the status of the drivers’ indicators.

• If both indicators do not light up, see "Driver not lighting up>>" to troubleshoot.
• If both driver indicators glow red or green, check their power supply (normally 36V or 24V). (as shown)

A. If the voltage is abnormal,

• Remove all the load from the power supply.
• Check the voltage again.
• If the voltage still turns out to be abnormal, then the power supply is faulty; replace it with a new, identical one.

B. If the voltage measures normal,

• Plug back the loads one by one to sort out the one that was causing the problem; if it was the mainboard, use the steps in "Mainboard causing the laser power voltage to drop>>"
• If the voltage still measures normal with all the load plugged back in, contact Customer Service.