Fanuc Servo Amplifier Alarm HCM

Fanuc CNC Info High current M axis

Model: FANUC Alpha/Beta Servo Amplifier | Code: HCM

Applicable Systems
Series 0i Series 16/18/21 Alpha Beta

Symptoms

A high current alarm was detected on the M axis.

Possible Causes

  • Servo amplifier internal hardware fault
  • Power supply voltage abnormality
  • Cooling system failure
  • Parameter or configuration error

Troubleshooting Steps

  1. Step 1: Check the servo amplifier LED status display for the alarm code
    LED displays the specific alarm code
  2. Step 2: Verify the input power supply voltage and phase balance
    Power supply voltage is within specification
  3. Step 3: Check the cooling fan and heatsink for proper operation
    Fan operates normally; heatsink is clean
  4. Step 4: Inspect all cable connections between amplifier, motor, and CNC
    All connections are secure
  5. Step 5: If hardware fault, replace the servo amplifier module
    New amplifier operates without alarm

How to Reset

To reset servo amplifier alarm HCM: 1) Identify the alarm from the amplifier LED display. 2) Check power supply and cooling. 3) Power cycle the servo amplifier. 4) If alarm persists, replace the amplifier module. Caution: Servo amplifier faults may indicate motor or cable problems; test all components before replacement.

Frequently Asked Questions

  • Q: What does HCM mean on Fanuc FANUC Alpha/Beta Servo Amplifier?

    A high current alarm was detected on the M axis.

  • Q: How do I fix HCM on Fanuc?

    Follow the troubleshooting steps: Check the servo amplifier LED status display for the alarm code

Related Fanuc Fault Codes

Source: FANUC Servo Amplifier Alarm Codes (tristarcnc.com)

Category: CNC