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KUKA Robot Controller
Servo/Axis · Basic
KUKA Robot KRC0646 - No axis selected
This alarm occurs when attempting to execute a tacho balance operation without first selecting a specific axis in the KRC4 controller. Tacho balance requires an active axis selection to properly calibrate the tachometer feedback on that axis.
KRC0646
KUKA Robot KRC0646 - No axis selected
No axis selected
This alarm occurs when attempting to execute a tacho balance operation without first selecting a specific axis in the KRC4 controller. Tacho balance requires an active axis selection to properly calibrate the tachometer feedback on that axis.
Common Causes
- No axis selected in the teach pendant before initiating tacho balance command
- Axis selection was deselected or cleared before tacho balance operation started
- Incorrect sequence of operations in the maintenance or calibration procedure
- KUKA smartPAD interface not responding to axis selection input
- Corrupted axis configuration preventing proper axis selection state
Troubleshooting Steps
- 1Verify all axes are powered and ready using the KRC4 status display on the KUKA smartPAD
- 2Explicitly select the target axis using the pendant axis selection buttons before tacho balance
- 3Check that the selected axis is highlighted and confirmed in the teach pendant display
- 4Review the tacho balance procedure in the KUKA system documentation to ensure correct operation sequence
- 5Reset the KRC4 controller and attempt axis selection again if selection state appears stuck
- 6Contact KUKA service if axis selection functionality remains unresponsive after controller reset
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