Z axis rapidly moving

so i have adjusted the step motors now, and everything works as id should except the Z axis. when commanded to move, i makes a vibrating noise and tries to move it up and down at the same time. i have just built it.

Too much friction in Z axis stalling the motor.

Or…

Stepper motor drive current no high enough - adjust reference voltage on driver board.

Or…

Motor phases wired incorrectly.