Printrbot idler latch with 3 mm filament guide and captive nuts
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Published on November 26, 2012
Description
This is a parametric part I designed for my Printrbot+ (wooden extruder). It replaces the little wooden latch, guides 3 mm filament, and holds the nylock nuts so you don't have to.
My first thing!
My first thing!
Instructions
The holes and hexes are designed at 108% of the ideal size. My printer likes to make tight holes, in spite of pretty good calibration every which other way, and this gave me a good fit. Your mileage may vary.
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License
Printrbot idler latch with 3 mm filament guide and captive nuts by rswarner is licensed under the Attribution - Share Alike - Creative Commons license.
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I printed in ABS with 40% rectilinear infill. I really didn't like the way the nut traps don't close out on the bottom, but it worked fine for me. My nylocks were pretty well exercised when I installed this, so maybe newer nylocks require more torque than it'll tolerate. Anyway, I just uploaded a derivative with the hexes rotated and the 6-32 holes raised 0.5 mm so that you have a 1.2 mm border across the bottom of the nuts. Hope that works for you. Let me know!
Will print it in the morning or when the wife falls asleep :)