61556

Access the grinding wheel data table via Siemens HMI menu: Diagnostics > Tool Data > Grinding Wheels or via SINUMERIK Shop Mill/Turn interface. Locate the active wheel record used in CYCLE432.

Verify wheel diameter (D1 parameter) and wheel width (B parameter) in the grinding wheel record. Cross-reference with CYCLE432 call parameters CHA (chamfer) and RAD (radius) in the part program block.

Ensure CHA + RAD does not exceed wheel width B, and that geometric clearance exists for both features on the left edge profile.

Reduce chamfer or radius values in the CYCLE432 call, or increase the grinding wheel width/diameter in the tool data to accommodate both geometric features.

Re-execute the part program block. If alarm persists, verify wheel data was saved (MD parameter TOOL_CHNG_POS or equivalent tool offset update).

Review the CYCLE432 block in the active NC part program. Check syntax: CYCLE432(D, FEED, CHA, RAD, ...) and confirm CHA and RAD values are intentional and not swapped or duplicated.

Verify parameter logic: chamfer angle (CHA in degrees or mm) should not geometrically overlap with radius (RAD in mm). Typically, chamfer is applied first, then radius; ensure parameter order matches grinding wheel edge design intent.

Consult Siemens SINUMERIK 840D/840Di Grinding Cycle documentation (CYCLE432) for correct parameter sequence and constraints.

Edit the CYCLE432 call to use only one edge feature (chamfer OR radius) on the left edge, or adjust values to non-conflicting magnitudes (e.g., CHA=0.2mm, RAD=0.5mm with sufficient wheel width).

Test the corrected CYCLE432 call with DRY RUN or SINGLE BLOCK mode to confirm alarm clears before production execution.

Access Tool Management via HMI: Manage Tools > Grinding Wheels or via SINUMERIK Operate menu. Identify the wheel record assigned to the CYCLE432 call (check tool number/name in the cycle parameters).

Inspect the wheel data record for completeness: verify D1 (diameter), B (width), and left edge geometry fields are non-zero and within valid ranges. If any field is empty or '0', re-enter correct values from the physical wheel specification sheet.

Zero or null values in wheel geometry fields will cause NCK validation to fail.

Save and confirm the grinding wheel record update (typically via 'Save' or 'OK' button in tool data dialog). Force a tool table reload by exiting and re-entering the tool management screen or issuing a manual M06 tool change.

Re-run CYCLE432 and confirm alarm 61556 no longer appears. If alarm recurs, the wheel data may be corrupted; consider backing up and re-creating the wheel record.