Anti-backlash Nut Block

Lead Screw 350mm

Flexible Coupling 5x8mm. After assembling, tighten the set screws on the flexible coupling to hold the motor and the lead screw in place. One set screw should center on the flat section of the D-shaped motor shaft. Then tighten the 2 clamping bolts. One will clamp down on the 8mm leadscrew, and the other on the 5mm Motor shaft.

Hold the lead screw with one hand and the Anti-backlash Nut block with the other. Without turning the Nut block, try to move it up and down. If you notice any wiggle room, tighten the Set Screw on the Nut Block until all play disappears. Then, tighten the M4 Hex Nut to lock the Set Screw in place.

Do not overtighten the Set Screw, as this may over-constrain the lead screw.