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FANUC Alarm ACAL-086 — UTool is too small

FANUC ACAL-086 (“UTool is too small”): The specified UTool is zero or small, and the Calibrate UTool is disabled. First check: Set UTool to be the precision calibration fixture location or enable UTool calibration in the calibration schedule.

Updated 2026-09-17 · LogrobotLM reference

Description

The specified UTool is zero or small, and the Calibrate UTool is disabled.

Remedy

Set UTool to be the precision calibration fixture location or enable UTool calibration in the calibration schedule.

Related codes

ACAL-084Failed to access Karel vars.ACAL-085UFrame is too smallACAL-087Joint rotation is smallACAL-088Points are colinear

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