Start: 414 on Z ↓ Power cycle? → Clears? → Intermittent (check battery/cable) ↓ No Check battery → Low? → Replace + reset absolute ↓ OK Inspect Z encoder cable → Damage? → Replace cable ↓ OK Reseat connectors at motor & amp → Clears? → Done ↓ No Swap Z & Y cables at amplifier → 414 moves to Y? → Fix Z cable ↓ No Swap Z & Y amplifiers → 414 moves to Y? → Replace Z amplifier ↓ No Replace Z motor pulse coder (encoder)
Contamination from coolant or oil can seep into the Z-axis motor, causing a short circuit or "ground fault."
Inspect the power cable leading to the Z-axis motor. Coolant often seeps into the "Cannon" connectors, causing a short circuit between phases. Clean the connectors with electrical contact cleaner and dry them thoroughly. 4. Feedback (Encoder) Issues