280-049D

Check modulo axis configuration

Navigate to MOD function and verify modulo axis settings. Check if axis is properly configured as modulo with correct range (typically 0-360° for rotary axes).

Use machine parameter MP1800 to verify modulo axis configuration

Analyze macro movement path

Review the OEM macro code to identify movement commands that cross zero boundary. Look for large angular movements or direction changes.

Do not modify OEM macros without proper documentation and backup

Modify movement strategy

Restructure the macro to avoid zero crossover by using intermediate positioning or changing movement direction.

Consider using M126/M127 to temporarily disable modulo function if appropriate

Access machine parameters

Enter MOD function, select machine parameters, navigate to MP1800 series for modulo axis settings.

Machine parameter changes require proper authorization and may affect machine calibration

Verify modulo range settings

Check MP1800 (modulo axis enable) and MP1801 (modulo range) for correct values. Standard rotary axis should be 360.000 degrees.

Document original parameter values before making changes

Test axis movement

Perform manual axis movement in MDI mode to verify modulo function operates correctly across zero boundary.

Use small incremental movements when testing near zero position

Check current axis position

Display current position using POS function and note the modulo axis position relative to zero boundary.

Use actual position display to see true axis location

Analyze target position

Review the macro start position command and calculate the required movement path from current to target position.

Consider both positive and negative direction movements

Reposition axis manually

Use manual mode to position the modulo axis to avoid zero crossover, then restart the macro.

Position axis within 180° of target to ensure shortest path

Review macro source code

Access the OEM macro through the file manager and examine positioning commands for modulo axis movements.

Only qualified personnel should modify OEM macros

Identify problematic commands

Look for absolute positioning commands that may cause large angular movements or incorrect coordinate calculations.

Check for missing or incorrect coordinate system transformations

Contact OEM support

Document the alarm condition and macro behavior, then contact machine tool builder for macro correction or update.

Provide TNC software version and complete alarm log when contacting support