Step 7: Z-Axis Transmission Nut

This tutorial is dated, if you are considering a CNC for your personal use, we would highly recommend purchasing a kit that is very stable from our wide range of machines available. Instead of using allthread for the lead screw and a standard nut, consider using a 5 start lead screw and anti-backlash nut. It will keep you from pulling out your hair by running much smoother and faster. We will install the method that provides transmission to the z-axis. The transmission consists of a lead screw and a nut. Very simply, the motor will turn the screw, and the nut is fastened to the z-axis assembly, moving the assembly as the motor spins. That is to say, when the motor turns clockwise, the nut will travel up, and if the motor turns counter-clockwise, the nut will travel down.