The spindle speed switching contactors are not pulling in correctly during power-on or mode switching. 24VDC Power Supply Failure:
: A hardware issue within the Spindle Amplifier itself that prevents it from sending the activation signal or processing the feedback signal. CNC Spares Troubleshooting & Solutions Check 24VDC Power fanuc 7115 alarm
, which can point to a broader power issue in the operator panel or control circuit. Feedback Timeout: The spindle speed switching contactors are not pulling
. Ensure they are physically moving and that the auxiliary contacts are sending the correct feedback to the CNC. Monitor Spindle Status: Check the status of the fanuc 7115 alarm
: Extreme cold or high humidity (e.g., after rainfall) can cause intermittent electrical faults in outdoor or poorly insulated cabinets. Troubleshooting and Solutions