stuck on full step

fleskesnabben

Hi there,

This is my first build of a 3d printer,
the build is a prusa i2 with ramps1.4 on a mega board,
i use A4988 stepper drivers,
nema17 motors with 200steps/rev,
X and Y axis has GT2 belt with 20tooth drives and Z axis is 1:1 with m8-1,25 rod.

My problem seems to be with the resolution of microstepper, I have been playing with this thing for a few days now and can´t get it to work!

My X and Y axis should have 80steps/mm (200*16 / (2*20) = 80).
But to get my printer to move correctly I have to put in 5steps/mm (200*1 / (2*20) = 5).
It´s also tha same for my Z axis, have to use 160step/mm instead of 2560step/mm.

In my head this means that my printer only works in full steps and not 1/16 steps.

the printout is ok, but the printer shakes a lot and sounds really rough.

My question is, how do i change it to use 1/16 steps?

Repetier

Depends on the board. Most boards need to add 3 jumpers per stepper driver for 1/16 steps. Without jumpers it is full step mode. These jumpers are often below the stepper drivers as 2x3 rows.

fleskesnabben

Oh my god, would you look at that!!
I have been playing with the FW for days and googling my brains out!! never even questioned those rows of jumpers..

Well, thank you so mutch for this easy fix!

Auchen

It's 3am in the morning and this little tiny post has completely fixed all my problems. I bought a ramps 1.4 board from sainsmart and in their tutorial on how to set it up they failed to mention those 3 little posts. I have been scouring forums trying to figure out how to initiate 1/16 Steps. So thank you so much and I hope others find this post too.