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DoomMeister's, Kuehlings Sells/Prusa X Ends

by doommeister, published

DoomMeister's, Kuehlings Sells/Prusa X Ends by doommeister Jan 19, 2013
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Summary

I am busy renovating/improving my sells Mendel to use linear bearings, smaller pitch belts and proper lead-screws and I noticed a few things.

1) Prusa (iteration 2) X ends don't fit the sells design, the distance between the Z axis and lead-screw is 30mm not 29mm. I only noticed this after printing a set :(. As an aside I think the belt driven Z lead-screw is a much better design than the dual motor one and will be sticking with it.
2) There are a great many x axis designs for trapezoidal (ACME) lead screws, but they all use metal nuts. As evidenced by my old Z screws, and the small pile of iron fillings at the bottom of the Z screws on my Orca this is not a good idea.
3) The Prusa SCAD sources are a pain in the bum to edit.

With this in mind I have modified Jonas Kuehlings - Improved X ends for Prusa with clamped rods
to accept a plastic lead-screw nut which you can machine or print. The Z nut press fits into the holder (use an 8mm bolt to help) and is held in place with a key bolt.

I have split the Z Nut into another thing as I prefer to GPL my things and base for this design is CC-BY-SA

Files posted for both the Sells and Prusa Mendel.

Instructions

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Comments deleted.

Hello,

Can You send STL files for z-nut holder and lm8uu holder?
I made 1 set of it but I can't work with this.

Regards.
BW.

How well does it work?

I am still in the testing phase of my Mendel rebuild so it has not been run in anger yet but first impressions are good.

Am using Oilite bushings, POM leadscrew nuts and 10x2 Trapizoidal threads with the sells type Z drive and it seems to be pretty good.

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