The Z axis larger prints
I have a problem when printing, the Z axis resizes what you print.
The configuraciond is correct 2560 steps per minute, the configuration of the pololus is also correct, but what print is larger than the model.
Have you measured how much z axis goes up when you say 10mm? Sounds like it has a different steps per mm then you think it has. 2560 steps per mm is for M8 with /16 substepping. Other combinations have other resolutions.