How to solve the problem of the spindle not rotating in large CNC machining centers

The transmission modes of the spindle in large CNC machining centers include direct connection and belt transmission. Both transmission modes can cause the spindle to not rotate. What should be done if the spindle in the machining center with belt transmission fails to rotate?

Below, the editor will organize it for everyone's reference:

Caused by mechanical transmission failure in the CNC machining center: Firstly, check if the belt transmission of the machining center spindle is broken.

Check if the three-phase power supply to the spindle of the machining center is out of phase or out of phase: Check the power supply and replace any two power lines.

CNC machining center circuit connection error: carefully refer to the circuit connection manual to ensure correct wiring.

The CNC machining center system does not have corresponding spindle control signal output: Use a multimeter to measure the system signal output end. If there is no spindle control signal output, relevant IC components need to be replaced or sent to the factory for repair.

The CNC machining center system has corresponding spindle control signal output, but there is an open circuit or component damage in the power supply circuit and control signal output circuit. Use a multimeter to check the power supply circuit between the CNC machining center system and the spindle motor to see if there is an open circuit in the signal control circuit; Is there an open circuit; Check for poor contact between the contacts of each wiring; Check if the AC contactor and DC relay are damaged; Check if the thermal relay is overcurrent; Check if the safety tube is burnt out, etc.