330-0079

Check axis movement manually

Power down machine and manually move the affected axis to check for binding, excessive friction, or mechanical obstructions.

Ensure machine is properly locked out and axis brakes are released before manual movement

Inspect way lubrication

Verify lubrication system is functioning and ways are properly lubricated. Check lubricant level and distribution.

Cold machines often show this alarm due to thick lubricant - allow proper warm-up cycle

Examine ball screws and linear guides

Inspect for contamination, damage, or wear on ball screws, nuts, and linear guide systems that could cause binding.

Listen for unusual noise during slow manual movement - grinding indicates bearing or screw damage

Check servo drive status LEDs

Examine the servo amplifier status indicators for fault conditions or irregular operation patterns.

Refer to drive manufacturer documentation for LED fault code interpretation

Monitor drive parameters

Access TNC diagnostic screens to check servo drive current, voltage, and temperature parameters during operation.

Use TNC Test Run mode at reduced feedrates to safely monitor drive behavior

Verify drive connections

Inspect power and feedback cable connections to the servo drive, checking for loose connections or cable damage.

Check connections only with power off - high voltage present at drive terminals

Access machine parameter settings

Navigate to MOD function and access machine parameters for the affected axis acceleration/deceleration settings.

Document current parameter values before making any changes

Review axis dynamics parameters

Check parameters for maximum acceleration, jerk limitation, and emergency stop deceleration rates against machine specifications.

Incorrect parameters can damage machine components or cause crashes

Adjust deceleration rates

Reduce deceleration parameters incrementally and test axis movement to find optimal values that prevent alarm.

Start with 50% of current values and increase gradually while monitoring for alarm recurrence

Check encoder signal quality

Access TNC position display and monitor encoder signals for dropouts, noise, or irregular counting during axis movement.

Use TNC's encoder diagnostic functions to view signal amplitude and quality indicators

Inspect encoder cables

Examine encoder cable routing for damage, excessive bending, or interference from power cables that could corrupt signals.

Handle encoder cables carefully - excessive bending can damage internal conductors

Verify encoder mounting

Check encoder mechanical mounting for looseness, contamination, or misalignment that could cause signal interruption.

Clean encoder disc/scale with appropriate solvent and lint-free cloth if contamination is present