330-00F5

Check current axis position

Press POS key to display current axis positions and compare with expected test position values.

Use the position display in incremental mode to see exact deviations

Access CfgAxisSafety parameters

Navigate to MOD > System Parameters > CfgAxisSafety and check positionMatch and positionDiffRef values for the affected axis.

Only modify safety parameters if you have proper authorization and documentation

Verify tolerance settings

Compare the position difference against positionDiffRef parameter - increase tolerance if mechanically acceptable or reposition axis to within tolerance.

Document original values before making any changes

Reset alarm and test

Press CE key to clear alarm, then execute reference point return (G74) to verify axis reaches correct test position.

Ensure machine area is clear before axis movement

Check encoder battery status

Navigate to MOD > Diagnosis > Encoder to check battery voltage and encoder status for all axes.

Encoder battery voltage should be above 3.0V for reliable operation

Perform reference point return

Execute manual reference point return using G74 or REF key for the affected axis to re-establish position reference.

Ensure reference point switches are clean and functioning properly

Verify encoder signals

Check encoder signal quality in MOD > Diagnosis > Position Control and look for signal interruptions or noise.

Look for consistent sine/cosine signal amplitude and proper quadrature relationship

Test position repeatability

Move axis to test position multiple times and verify consistent position readings within 1-2 encoder counts.

Mechanical backlash or wear may require compensation adjustment

Check backlash compensation

Navigate to MOD > Machine Parameters > Axis-specific parameters and verify MP1420 (backlash compensation) settings for affected axis.

Backlash values should match actual mechanical backlash measured with dial indicator

Inspect mechanical components

Physically inspect ballscrews, linear guides, and coupling components for wear, damage, or loose connections.

Lock out machine power and follow LOTO procedures before mechanical inspection

Measure actual backlash

Use dial indicator to measure mechanical backlash and compare with MP1420 compensation value.

Measure backlash at multiple positions along axis travel to identify wear patterns

Adjust compensation parameters

Update MP1420 backlash compensation value based on measured results and test axis positioning accuracy.

Incorrect backlash compensation can cause axis oscillation or poor surface finish

Review safety configuration

Access MOD > System Parameters > CfgAxisSafety and document current positionMatch values for all axes.

Compare with machine setup documentation and previous parameter backups

Verify test position validity

Manually jog axis to the positionMatch coordinate and verify this is actually a safe position for testing.

Ensure test position does not create collision risk with fixtures or machine components

Update safety parameters

Modify positionMatch value to reflect correct safe test position based on current machine configuration.

Safety parameter changes require proper authorization and validation testing

Validate safety function

Execute complete safety test cycle to verify alarm clears and axis positioning functions correctly.

Document all parameter changes in machine logbook for future reference

Check drive status

Navigate to MOD > Diagnosis > Drive Status and check for drive faults, warnings, or position following errors.

Look for consistent following error values - large variations indicate control problems

Verify position loop parameters

Check drive position loop gain settings (Kv factor) and ensure they match machine specifications in drive configuration.

Incorrect loop gains can cause instability or poor positioning accuracy

Test motor and feedback

Perform motor and encoder tests using drive diagnostic functions to verify proper motor operation and feedback signals.

Motor current should be consistent during positioning moves without excessive variation

Optimize drive parameters

Use drive auto-tuning function or manually adjust position loop parameters to improve positioning accuracy and stability.

Save original parameters before making changes and test thoroughly after adjustments