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Printrbot idler latch with 3 mm filament guide and captive nuts

by rswarner, published

Printrbot idler latch with 3 mm filament guide and captive nuts by rswarner Nov 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!

Recent Comments

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Cfg: Thanks! Glad it's working for you!
rswarner -

Here is my copy in action : youtube.com/watch?v=1meXkVP0kYE
Printed in PLA with support on a Printrbot LC+ v2 - looks perfect and works awesome!!!! Thank you!

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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.

rswarner -

Here is my copy in action : youtube.com/watch?v=1meXkVP0kYE
Cfg: Thanks! Glad it's working for you!
Printed in PLA with support on a Printrbot LC+ v2 - looks perfect and works awesome!!!! Thank you!
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 :)
This looks great but the nut traps don't hold well enough to tighten for me. Are you printing with ABS or PLA? Or printing with a heavier than normal infill?
Prints and fits fine with Printrbot Jr. Thanks!
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