I've posted this elsewhere, but i figured it's best to put it somewhere dedicated to issues.
I've build an i3 from the Gadgets3D kit, got pretty much everything going alright except for that I can't seem to calibrate my z-axis.
It may also be effecting the other steppers, but they seem about correct with the default settings.
The Z axis uses m5 rods and so should be set to 4000 steps/mm, but whatever I do in config.h, i can't get the scaling to change.
Movement is twice what I tell it to do. I've checked that EPROM is enabled (and disabled it to see if that helped) but no joy.
The steps/mm displayed on the LCD is 4000.
I'm stumped.
Any ideas?