JF

Mastering Error

Kuka · KK53Y Servo Motor

What does JF mean?

The JF signal indicates a mastering error, meaning at least one axis of the manipulator is not mastered. When this signal is '0', it signifies an active mastering error, which consequently deactivates space monitoring for safety. A '1' state indicates no error and active space monitoring.

Common Causes

  • General mastering error indicating a fault in the control or synchronization logic.
  • Communication disruption or data inconsistency within the mastering system.
  • Internal software error within the mastering controller.
  • Configuration error in critical mastering parameters.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Perform the complete mastering procedure for all manipulator axes according to the robot's operating instructions.

  2. 2

    Verify that the 'JF' signal output transitions to '1' after successful mastering, confirming the error is cleared and space monitoring is reactivated.

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Verified technical data. Last updated: March 2026

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