Small Z axis step: Repetier-Firmware 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.
I solved this problem by change EEPROM value to "2" in Configuration.h:

#define EEPROM_MODE 2


Now ZAXIS_STEPS_PER_MM value load from firmware, not EEPROM.

#define EEPROM_MODE 0


— does not result in my case.