LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

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 2026-08-29 · LogrobotLM reference

Description

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

Remedy · Remède

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

Frequently asked · Questions fréquentes

What does FANUC alarm ACAL-086 mean?
FANUC ACAL-086 (“UTool is too small”): The specified UTool is zero or small, and the Calibrate UTool is disabled.
How do you troubleshoot FANUC alarm ACAL-086?
Set UTool to be the precision calibration fixture location or enable UTool calibration in the calibration schedule.

Related codes / Codes liés

ACAL-084Failed to access Karel vars.ACAL-085UFrame is too smallACAL-087Joint[%s^1] rotation is smallACAL-088Points are colinear

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →