FluidNC Error 18

FluidNCErrorPosition is kept

You asked the machine to home, but homing is turned off in its settings.

Position is kept. An error means the controller refused that one line or command, so nothing moved for it. (Hamrun's reading)
What to do
  1. Turn homing on ($22=1 on GRBL) only if the machine has limit switches.
  2. If it has no switches, set work zero by jogging instead of homing.
Official FluidNC message: “No Homing/Cycle defined in settings” source

Got a different message?

Paste it into the decoder. Hamrun's editor checks your G-code before you run it, so a toolpath that leaves the machine's travel or a missing feed rate is caught before the machine stops.

Related codes

  • GRBL 1.1 Error 5: You asked the machine to home, but homing is turned off in its settings.
  • grblHAL Error 5: You asked the machine to home, but homing is turned off in its settings.

Official text copied from the FluidNC source on 2026-11-01. Steps and the position answer are Hamrun's reading unless marked “firmware says”. User reports are labelled CLAIMED.