Tell us about yourself!
can u upload the image that your drawing so everyone can see and help u
try use -19 to +19 so zero position in the center than try make square about 38 mm and see its correct or no about the size and tried switch one pair motor wires it look like your machine draw backward
Check cable to motor and are you add power supply to shield cause if not add PS power to motor weak sometimes not enough to run it sorry 4 my english
i use 4x4try make start plotter in corner but always in center
sometimes i get that error too i don't know why but that error came in the end after job done, i just don't know how to make start pen in the bottom corner till now it always in the center can any one know how ???
after a lot of trial and error that make my head dizzy my cnc finally done thank for great instructable and i plan make bigger size from printer and scanner thank all keep trying and done give up
i would like to start my plots from a corner and not from the middle just like file cat from wannduino, cause i start draw in inkscape always in middle, i try -20 to +20 instead of 0 to 40 but it always in the middle, please helppp