FluidNC Alarm 18

FluidNCAlarmPosition is lost: home again

A limit switch was hit during probing.

Position is lost: home again. Hamrun's reading: same sudden halt as a hard limit. (Hamrun's reading)
What to do
  1. Start the probe from a spot where the probe distance doesn't reach a limit switch.
  2. Home the machine, then set your work zero again before restarting the job.
Official FluidNC message: “Probe Hard Limit” 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.

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.