Convert a Manual Mill into a CNC Machine | Make:
Using the two 5mm screws from the fine feed mechanism, secure the Z-axis ball nut block to the side of the mill's head. The top part of the Z-axis lock will be sticking up in the air at this point. Use the large 12mm screw that came with the kit to secure the ball nut block from inside the spindle head. Just snug all screws up at this point.