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Parametric Peristaltic Pump

by Drmn4ea, published

Parametric Peristaltic Pump by Drmn4ea Sep 7, 2014
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Summary

This is a peristaltic pump design adapted from emmett's Planetary Gear Bearing. It prints as a single piece, with captive rollers and no rotary wear surfaces. The only non-printed part is the tubing itself.
This is a proof-of-concept and can be driven (out of the box) with a standard nut driver bit. For real applications, you probably want to add a mounting feature for a small electric motor or similar. The pre-baked STL file is for typical 3/16 inch OD latex surgical tubing; for other tubing or to adjust other parameters, use the OpenSCAD file and customize as needed.

Instructions

The prototype was printed on a Lulzbot TAZ printer. Depending on the printer you may need to adjust the 'tol' (tolerance) parameter, either to eliminate unwanted play between the gears or prevent them printing stuck together. Then just break it loose from the bed, thread the tubing through (latex surgical tubing works well) and Bob's your uncle.

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I want speed control in peristaltic pump, so can someone please suggest which motor to use, taking fittings into account?
ps: Thanks in advance!

Printed fine, but simply could not break the gears apart. Looks pretty, but just won't turn. I had a perfect hub fit, but just rounded it out, gears permanently stuck.
So, I have seen these work in the past from other folks - my print looked good, but the first layer looks like it fused. I used no supports, .2mm per layer, however, I have CURA 2.4 on many of its defaults, and am a noob. I wonder if what messed up my print was initial layer height being .3 instead of my normal .2 and the wall thicknesses being .6mm. There must be nuance to settings to make this type of print work.
Those who got this to work after the print - what settings did you use on it?

thanks,
DLC

Hey, that is an awesome design, great idea.

I did printed it, bit the inner gears ended up all in separated pieces and the whole thing collapsed.

I assume that pieces are not supposed to separate otherwise you could build like that.

Has anyone got an idea of what happened? Maybe a problem in the slicer?

Thanks!

A very nice design, Drmn4ea! Printed in one go on our IdeaWerk, 30% infill, 0.2 layerheight.

http://i.imgur.com/oSSqPuZ.jpg

Hey, i cannot get this print to move, the gears stick together and do not separate.
I am using cura, can anyone please tell me how to adjust tolerances in cura, Thank you.

Used fine, 0.15mm prints, took 4+ hours, prints beautifully however the tubes fail to keep water in tube at the specific position when only one gear is engaged at one time.

Printed using normal, 0.4mm prints turn out better than the fine print. needed a bit of prying to turn at first but works better and water almost doesnt escape at all, probably due to less precise boundaries and tighter gaps.

added a third hole, did some mods with it to add screws and a stand. it is beautiful work !

Has anybody tried to attach a motor to it? I'm working on two versions, one for a Nema and one for a 28BYJ. I would be very satisfied if I could get it to work with such an inexpensive motor. Any suggestions? Is it outright impossible, or is it achievable with reasonable reductions?

i have attached a windscreen wiper motor to one to use as a fuel transfer pump, works a dream

I really like this. Nicely done!

This is inspiring! I've been printing my planetary gearboxes wrong all this time!

Comments deleted.

This is really an out-of-the-box idea, so clever!

The only thought that haunted me is that maybe this system could break the tube after little use due the gears... then I realised that the tube runs inside!

You rule, great idea.

Incredible design! I didn't think my printer would do it, but it did - perfectly.

how much l/m can it push, and how much head does it generate?

Thanks! Awesome build.

Sep 17, 2014 - Modified Sep 17, 2014

It doesn't work for me.
I'm using:

  • XP S3
  • Scad v.2013.01.22
  • Repetier-Host v.1.0.3 (RH)
  • Slic3r 1.1.7
    I've problems with the exported scad-model to .stl,
    or even with the variant .stl-files found on Thingiverse...
    Importing in RH gives the remark it"s not manifold
    I tried repairing in MeshLab, Netfab basic, importing/exporting in Autocad/Sketchup...
    After slicing in RH the center gear is replaced by its axis (the negative of the hexa)

imo the design looks great!
but I would like to see it work
(I'm setting up a micro-brewery)

somebody?

I made one, but it could not work. It was too tight to insert tube. and it barely rotates.

I used printerbot simple and cura engine. the nozle diameter is 0.4mm. I don't know the reason, but I think it's good design.

I tried printing the original planetary gears, and I think you have to use a slow printing speed to get it as accurate as possible. My machine was shaking a lot when printing the small planets.
Could you upload a picture ?

Thank you for comment :) This is the picture. http://www.thingiverse.com/make:93233

It looks good, but too tight. Actually I printed it with very slow speed and it took about 3hours.
So, I guess that was matter of extrusion speed. Thus I'll reduce extrusion rate and try again.

Thanks ;D

Parametric Peristaltic Pump
Sep 8, 2014 - Modified Sep 8, 2014

Fantastic adaption of a great design !

I was planning on doing something similar with two planetary gears and bearings between the planets.
But your solution is much cooler.
Does it work, and do you have a movie of it ?

Thanks for sharing

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