Spindle fault: PPU shows spindle speed, but spindle cannot move, no alarm

What does Spindle fault Case 2 mean?

The PPU displays spindle speed values, but the spindle itself remains stationary without any associated alarm.

• Control system is in the program test state (status LED lit, PRT icon active)
• Underlying issues related to spindle control or connection (refer to Spindle fault Case 1 causes)

Click steps to track your progress.

1. 1

   Check whether the control system is in the program test state (status LED for program test on MCP must be off, PRT icon on PPU screen must be deactivated).

2. 2

   Perform the diagnostic steps for 'Spindle fault: Spindle cannot move, PPU shows 'waiting for spindle signal', no alarm' as described in Case 1.

3. 3

   If the fault still exists after these inspections, professional replacement and maintenance are necessary as the PPU is likely damaged.