Hi All,
I'm no expert but I've managed to make a couple of 3D printers over the last few years. My latest changes on my custom build was to add a huge Zimm TR18 jack screw to the z-axis (couldn't resist, it was free!)
I've got the thing running smoothly coupled to a Nema23 on Ramps with pololu drivers. The problem I have is as soon as I try to get the z steps correct (I've calculated 12800 per unit as it has a 1:16 ratio gearbox, 1.8deg stepper, 4mm per turn pitch) the motor behaves erratically, and doesn't really move much. If I turn the steps/unit down to around 3000 it moves nicely. If I try to alter the jumpers under the pololu it has a similar affect.
Is there another setting I need to adjust to allow this type of configuration?
Any help would be great.
Thanks,
/Trig.
Edited 1 time(s). Last edit at 06/02/2016 12:47PM by triggernom.
