Parametric idler pulley

by whosawhatsis, published

Parametric idler pulley by whosawhatsis Sep 2, 2010
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Parametric idler pulley by whosawhatsis is licensed under the GNU - GPL license.

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This is a parametric idler pulley for use with a bearing and a timing belt. This is based on Erik's suggestion (here: http://www.thingiverse.com/thing:3616 ) that Huxley should have proper idler pulleys rather than bearings with mudguard washers. Included are STLs for a 623 bearing with a 5mm belt (for Huxley), a 624 bearing with a 5mm belt (for Mendel), and a 608 bearing with 6mm belt (for makerbot).

My extruder needs a new motor, so I haven't tested this.

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I printed It in PLA, had a hard time getting the bearing inside the hole.. using a trigger clamp made it much easier.

The scale is not uniform, the object is not round!
Dont use it until it get fixed!

This will lower the precision because it tight and untight the belt when turning, and make the motor force more.

Try setting the variable to
$fn = 100;

Need to be upscaled.

PLA not a good choice for this, at least for small bearings. Basically destroyed the thing trying to get it in there. ABS may be more forgiving.

Hi, It might be worth mentioning that the scad file has a dependency on "hardware.scad" which I take to be a part of the MCAD library. I found a copy on github which I think is correct: https://github.com/elmom/MCADhttps://github.com/elmom/MCAD.


I don't think that's actually used for anything, I just had it in there for previewing the parts. I didn't realize I had left a reference to it in there.

My hardware.scad file was added to MCAD. So yes, that is the right one.