Measuring axis (rotary axis 1 or 2) not in basic or intended position

What does 61429 mean?

This alarm indicates that a rotary measuring axis is not in its expected basic or intended position during measurement operations. Error codes 'A' and 'B' relate to rotary axis 1 and 2 not being in basic position on the first measurement. Error codes 'C' and 'D' indicate that rotary axis 1 or 2 are not in their intended positions during subsequent measurements. This can cause inaccurate measurements, leading to incorrect machining outcomes and potential scrap parts.

• Mechanical obstruction or binding preventing the rotary axis (e.g., Axis 1) from reaching its homing or intended position.
• Loss of absolute encoder reference due to battery depletion or sensor damage for Axis 2, requiring re-referencing.
• Position feedback discrepancy between the actual axis position (r2521) and the controller's target, possibly due to incorrect scaling (e.g., Parameter P1-20).
• Drive enable signal (e.g., X1 terminal) not active or interlock engaged, preventing motor movement to the target position.
• Inaccurate homing procedure execution or miscalibration of the zero-point for the specific rotary axis.

Click steps to track your progress.

1. 1

   Manually jog Axis 1 and Axis 2 to check for mechanical binding or obstruction, verifying free movement and end-stop functionality.

2. 2

   Check the battery voltage for the absolute encoder on the affected axis (e.g., X10 connector terminals) if applicable; replace if below 3.0VDC.

3. 3

   Verify the drive's actual position (r2521) matches the commanded position from the PLC (e.g., output from Axis 1's position loop).

4. 4

   Inspect the encoder feedback cable (e.g., X45 terminal block) for continuity and proper shielding connection to the control unit.

5. 5

   Execute the homing routine (e.g., G-Code G28 or specific PLC function block) for the affected axis and verify the homing switch status (e.g., input I1.0).

6. 6

   Recalibrate the absolute position offset (e.g., Parameter P2-12) if the homing process consistently fails to establish the correct zero point.