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Mendel Pulley with 3 captive M3 nuts

by GilesBathgate, published

Mendel Pulley with 3 captive M3 nuts by GilesBathgate May 11, 2010
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Summary

This is derived from nopheads Mendel Pulley with captive M3 nut, but has been redrawn in openscad, and added more nuts for extra grip.

This part is also part of my OverlapStrap project which is licenced under GPLv3 see: http://www.gilesbathgate.com/OverlapStrap/
or checkout using

git clone http://www.gilesbathgate.com/OverlapStrap.git

Instructions

If you want to render/modify this using openscad then you will need to take the version of openscad from svn >= r545 or Release >= openscad-2010.05 since there was a bug "normalizing zero-length normals" that prevented the resulting stl from being opened.

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Thanks for posting the scad! I made mine a bit taller. also, one of my motors has a 4mm shaft. it was easy to adjust!

note: having more than two set screws actualy reduces the holding abuility. two set screws at aproximatly 90 deg of each other is optimal since it then uses the surface contact pressure to hold in place. Good design though :)

and if you want them at 90 degrees as you say then I think

for(j=[1:2]) rotate([0,0,j*(360/4)])

will work.

if you want 2 nuts change the line that says

for(j=[1:3]) rotate([0,0,j*(360/3)])

to:

for(j=[1:2]) rotate([0,0,j*(360/2)])

also 5 nuts is fun ;)

Nice stuff man. :)

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