Spindle fault: Spindle cannot move, PPU shows 'waiting for spindle signal', no alarm

What does Spindle fault Case 1 mean?

The spindle does not move, and the PPU screen displays a message indicating it is waiting for a spindle signal, without issuing any specific alarm.

• Incorrect setting of machine data MD30200 (encoder presence)
• Loose or damaged analog spindle interface X54 or no voltage output (pins 1 and 9)
• Poor connection cables of the PPU, spindle drive, and encoder
• Incorrect settings of machine data (MD30130, MD30240, MD30134, MD32250/MD32260)
• Spindle drive fault or damaged PPU

Click steps to track your progress.

1. 1

   Check the setting of machine data MD30200 (1 for spindle with encoder, 0 for without).

2. 2

   If using an analog spindle, check interface X54 on the back of the PPU for looseness or damage, and measure voltage output on pins 1 and 9 after starting the spindle.

3. 3

   Check whether the connection cables of the PPU, spindle drive, and encoder are in good condition.

4. 4

   Verify the settings of machine data MD30130, MD30240 (encoder type), MD30134 (spindle output polarity), and MD32250/MD32260 (rated motor speed consistency).

5. 5

   Check whether the spindle drive has a fault.

6. 6

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