Z axis length for my printer equals 120 mm. When I manually pass this length, from display controller menu, it's about few millimeters. Then I set the resolution (ZAXIS_STEPS_PER_MM) at 1600 steps per mm. And nothing changed, step still very small.
I use Repetier-Firmware, Arduino Mega+RAMPS 1.4, standard Nema 17 steppers and Prusa i3 like cartesian printer.
This is hardware or software problem? I checked the steppers, they're fine.