Hi Im trying to figure this out, and i am running out of idea´s When moving from G1 X0 F10 To G1 X10 F10 And Again G1 X0 F10, im loosing 2 mm The opposit direction, spot on. I make no difference if i move 10, 100 or 1000 mm. the exact same 2 mm. I tried adjusting the pully on x, same with z, to make sure there is no issue with slack Using mach3 and polabs57cnc bob There is as far i can see, no issue with the hardware, due to same 2 mm, on returning form +,. Backlash don´t make any sense, when it´s only one direction causing the problem. I´m totaly out of idea´s!