Z-axis stepper

My z-axis moves incredibly slow and there is no way for me to adjust it. My x and y change with adjustments but the z-axis is incredibly sluggish. I swapped the stepper drivers around and still the same thing.

Woops sorry but I figured it out with the EEProm settings. Next problem is Z axis steps per millimeter. It says I have gone 300 mm but its more like a half inch. Not sure whats going on…

Did you buy this from here?

If not, did you flash the firmware? Be careful swapping drivers they should be at a completely different voltage. There are two speed in repetier for the z axis. Lots of things, if you didn’t get it from here I don’t know where to start.