Threaded shaft controlling Z-axis movement.

Component providing controlled Z-axis spacing.

Coupling connecting a Z-axis motor to a screw.

Precision screw using balls to reduce friction.

Thin material used to adjust Z-axis alignment.

Structure supporting Z-axis hardware.

Threaded component engaging a Z-axis screw.

Support maintaining vertical component spacing.

Bearing enabling smooth Z-axis travel.

Belt transmitting motion to a Z-axis mechanism.