Excessive Position Error Amount During Stop

What does 410 mean?

This alarm indicates that when the servo axis is commanded to stop, its actual position deviates from the commanded position by an amount exceeding a predefined tolerance (position error limit). This suggests an inability to hold position or an unexpected disturbance while stationary.

• External force acting on the axis while stopped.
• Mechanical binding or excessive backlash in the axis.
• Insufficient holding torque from the servo motor or faulty brake (if equipped).
• Incorrect position gain (Parameter 1825) or stopping parameters for the servo.
• Faulty encoder or feedback system.

Click steps to track your progress.

1. 1

   Check for any external forces, such as tooling weight or workpiece sag, that might be moving the axis while it is supposed to be stopped.

2. 2

   Inspect the mechanical system for backlash, play, or binding that allows movement when the motor is stopped.

3. 3

   Verify the servo motor's holding torque and the functionality of any mechanical brake, adjusting or repairing as necessary.

4. 4

   Review and adjust servo parameters related to position gain (e.g., Parameter 1825) and position error limits (e.g., Parameter 1829), ensuring they are appropriate for the application.

5. 5

   Monitor encoder feedback for stability and accuracy when the axis is stationary, checking for noise or erratic signals.