230-0442

Access axis parameter menu

Navigate to MOD > Machine Parameters > Axes and select the affected axis from the alarm message.

Use the axis number from %2 in the alarm message to identify the specific axis

Check limit switch parameters

Verify machine parameters for software limit switches ensure lower limit is between -360° and +360°, upper limit is between 0° and +360°, and lower < upper.

Incorrect limits can cause unexpected axis movement or collision

Validate limit difference

Confirm the difference between upper and lower limits is less than 360° as required for modulo axis operation.

For rotary tables, typical working range is 350° to allow for proper modulo function

Apply and test configuration

Save parameter changes and perform controlled axis movement to verify proper limit switch operation within the corrected range.

Access protection zone settings

Navigate to MOD > Machine Parameters > Protection Zones and locate the zone configuration for the affected modulo axis.

Protection zones are often configured in pairs for rotary axes

Verify zone boundaries

Check that protection zone start and end positions comply with modulo axis rules: boundaries within ±360° and proper sequence.

Overlapping or inverted protection zones can cause immediate axis stops

Validate zone span

Ensure the total span of each protection zone does not exceed 360° and zones do not conflict with required axis travel range.

Test protection zone function

Activate protection zones and verify proper axis behavior when approaching zone boundaries during manual and programmed movement.

Verify modulo axis configuration

Check machine parameter for modulo axis enable and confirm the axis is properly defined as a rotary modulo axis in the TNC configuration.

Modulo parameter must be active before limit constraints are evaluated

Review moveAfterRef parameter

Examine the moveAfterRef machine parameter setting to ensure it's compatible with the current limit switch and protection zone configuration.

Incorrect moveAfterRef can prevent proper axis positioning after reference

Check axis scaling and units

Verify that axis scaling parameters match the expected degree units and that limit values are interpreted correctly by the TNC system.

Validate complete axis setup

Perform axis reference sequence and confirm all modulo, limit, and protection functions work together without conflicts.

Review parameter entry log

Check the TNC parameter modification log to identify recent changes to limit switch or protection zone parameters for the affected axis.

Use the parameter history function to compare current vs. previous working values

Recalculate limit values

Manually verify all limit switch and protection zone calculations, ensuring proper conversion between mechanical positions and degree values.

Cross-reference machine documentation

Compare current parameter values against machine manufacturer specifications and previously working configurations.

Always backup current parameters before making corrections

Implement corrected values

Enter the verified correct parameter values and test axis operation through full range of motion to confirm proper function.