Feed axis fault: Screen shows movement values, but axis does not move

What does Axis not moving mean?

The PPU screen indicates that the feed axis is moving, but the physical axis remains stationary. This suggests a disconnection between the control system and the mechanical movement.

• Control system is in the program test state (status LED lit, PRT icon active)
• Mechanical coupling is loose
• Connections between the control system and the drives are not in good condition
• Damaged drive terminals or damaged PPU

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

   Check whether the mechanical coupling is loose and secure it if necessary.

3. 3

   Verify that the connections between the control system and the drives are in good condition and that the terminals on the drives are not damaged.

4. 4

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