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FANUC Controller
Spindle · Intermediate · 5-30 minutes
Fanuc 593 - Spindle rotary table error
Alarm 593 indicates a fault in the spindle orientation/positioning system, typically occurring when the spindle cannot achieve or maintain the correct rotational position for tool change or indexing operations. This alarm is commonly triggered by problems with the spindle orientation sensor, encoder feedback, or mechanical issues preventing proper positioning.
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Fanuc 593 - Spindle rotary table error
SPINDLE ROTARY TABLE ERROR
Fanuc spindle alarm 593: SPINDLE ROTARY TABLE ERROR. The spindle drive or spindle motor has detected a fault condition that requires diagnosis before spindle operation can resume.
Root Cause Summary
Alarm 593 indicates a fault in the spindle orientation/positioning system, typically occurring when the spindle cannot achieve or maintain the correct rotational position for tool change or indexing operations. This alarm is commonly triggered by problems with the spindle orientation sensor, encoder feedback, or mechanical issues preventing proper positioning.
Safety
- Verify corrected program or parameters before resuming machining
Causes and Fixes
- 1
Check spindle encoder cable connections at both the motor and drive amplifier for loose or damaged connectors.
- 2
Inspect the encoder cable for physical damage, pinching, or oil contamination along its entire length.
- 3
Monitor encoder feedback signals on the drive diagnostics screen during manual spindle rotation to verify clean pulses.
Ensure spindle is in safe condition before manual rotation
- 4
Replace spindle encoder or orientation sensor if feedback signals are erratic, missing, or if resistance/voltage values are outside manufacturer specifications.
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