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Access Diagnostics > Parameters menu; navigate to MD 34700 (_TSA or Safety Margin Tolerance). Document current value in machine units.

Review measuring cycle blocks in part program; identify setpoint values and expected tolerance stack. Increase MD 34700 by 10-15% increments until alarm clears during test cycle.

Do not exceed workpiece tolerance specification; maintain margin between safety threshold and part limit.

Run 3-5 consecutive measuring cycles on the same feature to validate repeatability. Confirm alarm no longer fires and probe readings remain within new safety margin.

Execute probe calibration cycle (typically G65 P9832 or machine-specific calibration macro). Measure calibration sphere diameter; confirm match to reference standard ±0.005mm.

Allow 15-30 minute spindle warm-up before calibration if machine idle; thermal growth affects probe offset.

Verify SD 32720 (probe radius offset) and SD 32725 (probe calibration datum) against calibration record. Update if calibration has drifted >0.01mm from documented baseline.

Re-run the alarm-triggering measuring cycle block. If alarm clears, probe calibration was root cause. If alarm persists, check workpiece setup or setpoint value accuracy.

Review the NC block triggering alarm; extract setpoint value and safety margin calculation. Measure actual workpiece feature with independent precision instrument (caliper, height gauge, or CMM).

Compare independent measurement against programmed setpoint. If workpiece is consistently undersized or oversized >0.05mm, adjust setpoint in NC program to match actual process mean or allow cooldown time before measurement.

Verify setpoint change does not violate workpiece tolerance specification or functional requirement.

If thermal growth suspected, insert M25 (spindle stop) and dwell time before measuring cycle to allow spindle contraction. Re-run cycle and confirm alarm clears.