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HandFuge - Hand-powered centrifuge

by gringer, published

HandFuge - Hand-powered centrifuge by gringer Dec 7, 2016
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1295Views 140Downloads Found in Biology

Summary

A 3D-printed version of the Paperfuge, based on ideas presented the following paper:

http://www.nature.com/articles/s41551-016-0009

The thin adapter pieces fit around a 1.7ml microfuge tube, which then sits in the grooves in the model. Make sure that the centrifuge is balanced (i.e. use 2, 3, 4, or 6 tubes at once, arranged symmetrically).

Feed two pieces of <3mm rope (e.g. old shoe laces) into the holes, twist the ropes together, then pull and let go to create a forward/reverse centrifuge action.

An audio analysis of my video suggests that this could be running at around 30,000 RPM (~100 samples per spin at 48kHz).

Handfuge in Action

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This is cool, but when I go to print it, it isn't rafting for the handles off to the sides, so they must not be on the same plane as the rest of it.

This is possible, because they are generated from a minkowski sum and I haven't done an additional slice across the entire surface to ensure uniformity.

You shouldn't need a raft for this print, but if it is a problem you could break the model into parts and print each part separately.

I know I shouldn't need a raft, but my filament isn't sticking to the bed very well without it, which has nothing to do with this print. I did break it, and it is printing now. Hopefully I will be able to try it out tomorrow.

I'll have another look at the model and see what I can do about getting it exactly level.

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