Z axis not moving (8 replies)

Greetings, I am assembling a prusa i3 and I have run into a problem. After a bad Ramps 1.4 board I have a shinny new sainsmart RAMPS 1.4 that I can get all systems functional except the z axis steppers. I feel it is something I'm missing. If I move the steppers to different axis they work, if I move the step drivers into the z axis it still doesn't work.what am I missing? I borrowed another RAMPS and I get the same issue... Terribly frustrated. I've done searches but I might not be getting the correct keywords.

Thanks.