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Replacement Fan Knob

by maurerpe, published

Replacement Fan Knob by maurerpe Oct 19, 2012
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4419Views 680Downloads Found in Replacement Parts

Summary

Replacement knob for variable speed fan, for D shaped attachment. Includes ridges on the outside for easier grip.

I hate throwing away a perfectly good thing just because one small part breaks. This is a perfect example. The fan worked fine, in fact the knob broke off in the "high" position, so plugging and unplugging the fan worked, even if a hassle and slightly dangerous.

This is where 3D printing shines. We are no longer at the mercy of large companies and parts resellers that discontinue or obsolete parts all the time. We can print our own parts and fix our own things.

Instructions

1) Measure your busted knob and/or the fan
2) Enter the parameters in the attached .scad file
3) Render and Print
4) Install on Fan
5) Use a sharpie to labels the speeds and settings.
6) Cool off

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I know pretty much nothing whatsoever about SCAD but I noticed changing the value of total_height seemed not to do what I expected until I changed "height =" to "h =" in this line:

  translate ( [ 0, 0, thickness/2 ] ) cylinder( r = shaft_dia/2 + thickness, height = total_height - thickness/2, $fn = 32 );

I love fixing things with my 3d printer!

 Me too!

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