Great Open Source Syringe Pump article! [was Re: Interesting article on 3d printing and medicine]

[Patrik D'haeseleer]

On Wed, Sep 17, 2014 at 12:13 PM, Teddy Fagin <teddy...@gmail.com> wrote:

here's another seemingly relevant study http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0107216

Wonderful find, Teddy! 

Open-Source Syringe Pump Library

This article explores a new open-source method for developing and manufacturing high-quality scientific equipment suitable for use in virtually any laboratory. A syringe pump was designed using freely available open-source computer aided design (CAD) software and manufactured using an open-source RepRap 3-D printer and readily available parts. The design, bill of materials and assembly instructions are globally available to anyone wishing to use them. [...]

We've been talking about switching to a heftier stepper motor anyway - I propose we fully adopt this design, and add in some limit switches as our first modification.

Anyone have some Nema 17 stepper motors, M5 threaded rod, and 6mm smooth rods lying around? We could put one of these together with little effort on Thursday!

Total price for their simplest version is $90, but that includes $40 for a Raspberi Pi, and $16 for the stepper itself. Next most expensive component is $11 for the smooth rods, and $5 each for the threaded rod and bearings. Some of the smooth rods and bearings could potentially be replaced with 3D printed guide rails for a dirt-cheap version; probably not worth it to penny-pinch that much though.

Patrik

[Patrik D'haeseleer]

By the way, I know that some online suppliers allow you to turn a Bill of Materials into a kit that can then be sold on their website. 

Anyone know what I'm talking about, and interested in "kitifying" this thing? I've attached the BOM from the paper.

Thanks!

Patrik

[John Griessen]

On 09/17/2014 03:20 PM, Patrik D'haeseleer wrote:
> Anyone know what I'm talking about, and interested in "kitifying" this thing?

How many of you are interested in buying when a kit is made ready?

A first cut of a kit could be done in several weeks. It might not be exactly as below,
but better if any changes. Price would not include more than 30% markup +
shipping + any taxes (Texas sale tax).

Are there just 4 of you world wide and 2 have already kludged it from various parts
and won't buy again for a year?

John Griessen
kitmatic open SCAD microcontroller systems engineer interested in evolving
syringe pump designs a good bit past the state of this art:
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0107216