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

What does 61429 mean?

A rotary measuring axis (either axis 1 or 2) is not in its required basic or intended position during a measurement operation. This can occur on the first measurement (Error A or B) or during subsequent measurements when comparing positions (Error C or D). This will lead to inaccurate measurements or prevent the measurement cycle from proceeding correctly.

• Rotary axis position feedback mismatch with the target measurement position (e.g., mechanical slippage, encoder error).
• Incorrect reference point setting (P2500) or homing procedure for the measuring rotary axis.
• Deviations in the rotary axis's actual position (r0043) from its commanded position due to mechanical play.
• PLC program logic error commanding the axis to an incorrect pre-measurement position.

Click steps to track your progress.

1. 1

   Manually jog the affected rotary axis (e.g., A or C axis) to its home position and re-perform the homing procedure (G74, G75).

2. 2

   Check encoder feedback signals (A, B, Z channels) at the drive input terminals for signal integrity using an oscilloscope.

3. 3

   Verify parameters P2500 (reference point shift) and P2502 (zero mark distance) for the rotary measuring axis.

4. 4

   Use the diagnostic functions to monitor the actual position (r0043) and target position (r0040) of the rotary axis during measurement preparation.

5. 5

   Inspect the mechanical coupling of the rotary axis motor and gearbox for backlash or slippage.