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FANUC Alarm SVGN-138 — Invalid tipwear ratio.

FANUC SVGN-138 (“Invalid tipwear ratio.”): The tip wear ratio for one step wear measurement is invalid (less than 0.0 or greater than 1.0). First check: Set the wear ratio in the Tip Wear measurement macro program to a value between 0 and 1.

Updated 2026-09-17 · LogrobotLM reference

Description

The tip wear ratio for one step wear measurement is invalid (less than 0.0 or greater than 1.0).

Remedy

Set the wear ratio in the Tip Wear measurement macro program to a value between 0 and 1. The macro program WR_UPDAT is used to perform the Tip Wear measurement with the 1-Step Method. Set the wear-ratio which is found as a parameter in a CALL instruction to the program TWKCALC2, or a similar name. Follow the program comments to find the proper parameter to adjust: CALL TWKCALC2(wear-ratio,AR[2]).

Related codes

SVGN-136Thickness check cal err: bad deflectionSVGN-137Invalid Number of Thickness Cal pts.SVGN-139Could not read tip stick detect input.SVGN-140Uninitialized start distance number.

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