It may need to home Z first, try using a gcode file with
M111 S2
M368
I found the home Z command from here:
EDIT: If XCS has a button to find thickness, do the same thing to try capturing the URI packet.
It may need to home Z first, try using a gcode file with
M111 S2
M368
I found the home Z command from here:
EDIT: If XCS has a button to find thickness, do the same thing to try capturing the URI packet.