Driver controlling a Z-axis stepper motor.

PCB containing Z-axis motor-driving electronics.

Small precision positioning stage for Z movement.

Housing containing a Z-axis bearing.

Electronics coordinating Z-axis motion.

Power source dedicated to Z-axis hardware.

Ultra-precision stage capable of nanometer positioning.

Structure supporting Z-axis components.

Hardware controlling programmed Z-axis movement.

Protective fuse in a Z-axis circuit.