grblHAL Alarm 10

grblHALAlarmPosition is lost: home again

The emergency stop input is active.

Position is lost: home again. Hamrun's reading: an E-stop cuts motion at once, so treat position as lost if it happened mid-move. (Hamrun's reading)
What to do
  1. Release the E-stop button (or check the E-stop wire if nothing is pressed).
  2. Reset the controller.
  3. Home the machine, then set your work zero again before restarting the job.
Official grblHAL message: “EStop asserted. Clear and reset” 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.