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  1. Brass flange nut (trapezoidal thread) The flange nut may have come pre-installed on the Z motor lead screw. In that case, take it down.
    • Brass flange nut (trapezoidal thread)

    • The flange nut may have come pre-installed on the Z motor lead screw. In that case, take it down.

    • ZX coupler

    • M3x12 screws + M3 serrated washers

    • M3x45 screws + M3 serrated washers

  2. M3x12 screws + M3 serrated washers M3x12 screws + M3 serrated washers
    • M3x12 screws + M3 serrated washers

    • Screw the coupler onto the lead screw; nut facing down.

  3. M3x45 screws + M3 serrated washers The screws screw into the top two holes in the X motor.
    • M3x45 screws + M3 serrated washers

    • The screws screw into the top two holes in the X motor.

    • Leave the screws a bit loose.

  4. Make sure the ZX coupler AND  the Z motor screws are loose.
    • Make sure the ZX coupler AND the Z motor screws are loose.

    • Make the parts self-align.

    • Rotate the Z lead screw by hand to find the Z motor position in which the movement is the smoothest.

    • Moderately tighten both Z and X in position.

    • Do not over-tighten.

    • Put the printer on the edge of a table; that way you can tighten the Z motor screws from below.

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Filip Goc

Member since: 01/14/2016

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2 Comments

Yes. Trapezoidal! Our Z leadscrew has a trapezoidal thread, and thus the brass nut is also trapezoidal.

It's a kind of screw threading very similar to ACME, but metric (which is way better for 3D printers).

Check out Wikipedia for more info and join the lead screw threading nerd squad. https://en.wikipedia.org/wiki/Trapezoida...

Filip Goc -

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