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 →

ABB Error 50444 — Motion supervision

Error

ABB 50444 (“Motion supervision”): Motion supervision: loose arm detection on the indicated axis. Likely part: Mécanique de bras / Fixations (Mécanique de bras / Fixations).

Updated 2026-10-22 · LogrobotLM reference

What it means

Motion supervision: loose arm detection on the indicated axis. Typically reported after a collision.

What to check

  • After a collision, check the tightening of the arm, flange and gearbox screws to the manufacturer's torque.
  • Look for mechanical play by moving the axis.
  • Check the calibration after retightening.
  • Do not simply acknowledge the error.
  • Note: Mechanical supervision introduced on IRC5; no S4 equivalent.

Part to check / replace

ABB 50444 points to the hardware below — start here before ordering.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.

Related codes

50021Axis servo control / Feedback / Mechanics fault50052Joint speed too high50055Joint load high

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. How this reference is built →