230-00FB

Check Current Position and Program Coordinates

Press POS key to view current machine position. Compare against the programmed coordinates in the active NC block to identify which axis is exceeding limits.

Verify Machine Parameters

Access MOD function, select 'Machine Parameters', check MP320 (negative software limit switch) and MP321 (positive software limit switch) for the affected axis. Verify these match your machine's actual travel limits.

Review Tool Length Compensation

Check active tool table entry (TOOL CALL) and verify tool length values in tool table. Excessive tool length compensation can push calculated path beyond traverse limits.

Use the 'Test Run' mode with tool display to visualize the actual tool path before execution.

Adjust Program or Reset Limits

Either modify the NC program coordinates to stay within limits, or if machine physically capable, adjust MP320/MP321 values after consulting machine documentation.

Never increase software limits beyond machine's physical capabilities - risk of crash and damage.

Check Active Coordinate System

Review NC program for active G-code coordinate system (G54, G55, etc.) and verify correct preset is being used. Press 'POS' key and check 'REF' display.

Verify Preset Table Values

Access preset table via 'MOD' function, select 'Preset table'. Check preset values for active coordinate system match your intended workpiece datum location.

Validate Datum Setting Procedure

If preset values are incorrect, re-establish datum using proper touch probe cycle or manual preset entry. Ensure datum is set within machine's working envelope.

Use 3D graphics simulation to verify tool path relative to machine limits before running program.

Check Spindle/C-Axis Programming

Review NC program for M19 (spindle orientation), M3/M4 with C-axis moves, or SPOS commands. Verify C-axis position values are within ±180° or configured range.

Verify Spindle Parameter Settings

Check machine parameters MP3410-MP3420 for spindle/C-axis configuration. Ensure software limits match actual rotary axis capabilities.

Test Spindle Functions Separately

Execute spindle orientation and C-axis commands individually in MDI mode to isolate the problematic movement.

Ensure spindle is stopped and workpiece/chuck clearance is adequate before testing C-axis movements.

Identify Radius Compensation Blocks

Locate G41/G42 activation in NC program and trace through compensated path geometry. Look for small radii or sharp corners where compensation may cause overshoots.

Check Tool Radius Values

Verify tool radius in tool table matches actual tool. Excessive radius values relative to part geometry can cause path calculation errors.

Simulate Compensated Path

Use TNC's program run graphics with tool display active to visualize the compensated tool path and identify where it exceeds limits.

Consider using G451 (radius compensation with collision monitoring) for better path calculation in tight geometries.

Check Active Transformations

Review NC program for TRANS DATUM, ROT, MIRROR, or PLANE functions. Check if transformations are properly cancelled with TRANS DATUM RESET.

Verify Transformation Parameters

Examine transformation values and ensure the combination of original coordinates plus transformation doesn't exceed machine limits.

Test Without Transformations

Temporarily disable transformations to verify basic program geometry is within limits, then reapply transformations with corrected parameters.

Use PLANE RESET and TRANS DATUM RESET at program start to ensure clean transformation state.