Excessive deviation

What does F228 mean?

The DIAX04 SSE-03VRS drive has detected that the actual position or velocity feedback deviates excessively from the commanded value. This typically signifies that the motor is not following the commanded profile accurately, often due to mechanical issues, encoder problems, or insufficient motor torque. The drive faults to prevent unsafe or inaccurate machine movement.

• Mechanical blockage, binding, or excessive friction in the machine axis connected to the DIAX04 SSE-03VRS motor.
• Motor is undersized or experiencing a severe overload, preventing it from reaching the commanded position or velocity.
• Faulty motor encoder or loose coupling between the encoder and the motor/load, leading to inaccurate feedback.
• Incorrectly tuned position or velocity loop gains (e.g., S-0-0103, S-0-0104) in the DIAX04 SSE-03VRS drive, leading to poor control response.
• Interrupted or noisy encoder feedback signal to the DIAX04 SSE-03VRS.

Click steps to track your progress.

1. 1

   Inspect the mechanical system for any binding, obstructions, or unusual resistance that would prevent free movement. Disconnect the motor and check if the load moves freely.

2. 2

   Verify the motor encoder mounting and coupling are secure and free from slippage. Check encoder wiring for damage or proper shielding.

3. 3

   Review and optimize the position and velocity loop tuning parameters (e.g., S-0-0103, S-0-0104) in the DIAX04 SSE-03VRS. Perform an auto-tune if available.

4. 4

   Monitor the motor current and torque output via DIAX04 SSE-03VRS diagnostics to identify if the motor is attempting to move but lacks sufficient power.

5. 5

   If the issue persists, consider replacing the encoder or checking the motor itself for internal damage.