grblHAL Alarm 13

grblHALAlarmPosition is lost: home again

The probe was touched while the machine wasn't probing.

Position is lost: home again. Hamrun's reading: the controller stops at once, the same kind of sudden halt as a hard limit. (Hamrun's reading)
What to do
  1. Remove the probe clip or move the plate away before running a job.
  2. Reset, then home and re-zero.
Official grblHAL message: “Probe protection triggered. Clear before continuing.” 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 grblHAL source on 2026-11-01. Steps and the position answer are Hamrun's reading unless marked “firmware says”. User reports are labelled CLAIMED.