Hi Neil, thanks for clarifying, it makes sense to make it relative. Now that i think about it further. im using a thin material/stock. And my bottom z limit is roughly around 10mm above touchplate, and my probe command ask it to go 20mm down to probe triggering the soft limit (error 9).
Is this the reason why it go up, instead of down and trigger the alarm?
What sender are you using? Error 9 shouldn’t be because of a soft limit.
If you had an active probe pin for some reason or you had a soft limit alarm but your sender kept trying to send the gcode, you could get an Error 9.