Hi,
The picture of the board is from an UMO I presume, I have the UMO+ which has the UM2 white pcb. See picture; no jumpers present.
I have no new Z axes or stepper, so no change there.
Tested Z axes: 10mm stepped with ulticontroller measures 10mm.
Tested E axes, extruded 100mm of filament (through the ulticontroller). This is the outcome:
thread of 0,5mm thick, Length=2615mm. If I calculate it correctly this amounts for 513mm3 of PLA.
I also marked the PLA and moved 10mm with the extruder, this is exactly 10mm.
The printed parts have exactly the same size as before.
There is no grub screw on the extruder gear wheel, it has a flat surface so it is not able to move on the shaft.
It seems to be a complex problem :sad: