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hmm, okay seems like a stepper is not connected, or is wired wrong. Disconnected it and switch it with another stepper. When energized it should be locked.
Still seems like your z axis it trying to move way too fast. Lets see your gcode.
I will try to get another kind test code together (machine is apart to take pictures), I have three others up there somewhere. I am updating the instructions and looks like it would come in handy.