230-00FA

Access machine parameter menu

Press MOD key, select 'Machine Parameters' from setup menu, navigate to MP1020/MP1021 parameters.

Always backup current parameters before making changes using the parameter export function.

Verify limit switch values

Compare MP1021 positive limit values against machine mechanical travel limits and required program coordinates.

Ensure new limits don't exceed actual machine mechanical capabilities to prevent crashes.

Adjust software limits

Modify MP1021 values to accommodate required working envelope, ensuring adequate safety margin from mechanical limits.

Leave 5-10mm safety margin between software limits and actual mechanical travel limits.

Cycle power and test

Restart TNC control to activate new parameters, then test with manual axis movement to verify proper operation.

Check preset table values

Access 'Tables' menu, select 'Preset table', verify work offset values for active coordinate system (G54-G59).

Use the coordinate system display to visualize the relationship between machine and work coordinates.

Verify datum reference points

Confirm that programmed work offsets correctly represent actual part setup position relative to machine home position.

Incorrect datums can cause tools to move to unexpected positions, potentially causing crashes.

Recalculate work offsets

Use touch probe cycles or manual edge finding to establish correct work coordinate system origins within machine envelope.

Use cycle 1 (TOUCH PROBE) for accurate and repeatable datum setting.

Test program simulation

Run program in simulation mode to verify tool path remains within software limits with corrected work offsets.

Review tool table entries

Access 'Tables' menu, select 'Tool table', verify tool length (L) and radius (R) values for active tools.

Use automatic tool measurement cycles for consistent and accurate tool data.

Check tool compensation calls

Verify proper use of G43 H-word tool length compensation in part program, ensure correct tool numbers are referenced.

Missing or incorrect H-word values can cause unexpected tool positioning.

Validate tool measurement

Re-measure suspect tools using touch probe or tool presetter, update tool table with correct length values.

Implement tool breakage detection cycles to automatically verify tool integrity.

Test with corrected data

Run affected program sections in single block mode to verify proper tool positioning within limits.

Analyze program coordinates

Review part program for maximum coordinate values in each axis, compare against machine working envelope limits.

Use the TNC's program analysis function to identify maximum and minimum coordinate values.

Check coordinate transformations

Verify any G68 rotation, G51 scaling, or mirror functions that may affect final tool positions relative to machine limits.

Coordinate transformations can cause tools to move outside expected boundaries.

Validate post-processor output

Confirm CAM post-processor is configured with correct machine limits and coordinate system conventions for Heidenhain TNC.

Maintain separate post-processors for different machine configurations to avoid limit conflicts.

Modify program or setup

Either adjust part program coordinates or relocate part setup to ensure all movements remain within machine envelope.