Also when he clicks on ref all home, the z axis starts moving,should it ref home where its now setting and not move at all,especially without home switchs.On my machine with linuxcnc,I move the x,y,z axis any where on the machine and if i click on home for any of the axis then that is where that axis home location is for that session.does mach3 do that also if it is not set-up with home switches why does it move...