Thank you. I'll give it a look when I can. Not gonna lie, don't know the lingo yet but I'll get it figured out. I appreciate it.You could try to give the motors more power. If they don't get too warm, you just have to turn the small potentiometer on the stepper driver a little bit. If it's the right direction, the current for the motors should be higher and therefore their torque. You can also try and lubricate the Z axis spindle, if you have one. It might create too much friction and make the motor loosing steps, which will offset your position. You can also lower your speeds and see if that helps.