Hi Cathal,
This was a self print. The design flaw was that much of the force was placed on the lid of the eppies, which opened them mid spin and as such violently ejected them.
If I can find what I've done with it I'll take some measurements.
Cheers,
Chris
Sent from my iPhone
Sent from my iPhone
--On Wed, Aug 14, 2013 at 6:13 PM, Cathal Garvey <cathalgarvey@cathalgarvey.me> wrote:
Hi Christopher,
Dismayed to hear about your experiences, though not exactly surprised.
I'd love to hear more about the precise diameters of your tubes just
under the rim, and of the rim itself? Also, was this a self-print, or a
Shapeways print? If self-print, what are the diameters of the channels
the tubes sit into, and the diameters of the "lip-shelves" just inside
those channels that the tubes rest upon?
I'm assuming you're not using the earliest model, which simply had
conical shaped channels tubes were clicked into; those reliably ejected
above the second setting on my dremel! :)
On Thu, 15 Aug 2013 07:27:14 +1000
Christopher Pendlebury <mailinglists@christopherpendlebury.com> wrote:
> The rotor needs some design tweaking to hold the tubes in place.
>
> Also whenever you spin it do it in a steel pot or bowl.
>
> I tried it with two eppies with 500ul milk. I found that my eppies
> shot out of the rotor, ricocheted off the bowl and remain unaccounted
> for.
>
> The rotor itself holds up fine when spun. It can take as much spin as
> a dremel can throw at it.
>
> Sent from my iPhone
>
> On 12/08/2013, at 5:51 AM, Larry James <wulfdesign@gmail.com> wrote:
>
> > you'll need something with more rpm and variable speed... a dremel
> > like tool.
> >
> > be sure to follow safety instruction as well to keep from loosing
> > important body parts that may be useful later.
> >
> > L
> >
> > On Aug 11, 2013 6:27 AM, "B SM" <antarisr@gmail.com> wrote:
> > Hello,
> > My question pertains the "chuck edition" that works with drills as
> > stated in http://www.shapeways.com. Would any standard drill do? do
> > we need any particular bit/adapter? What is the expected time for
> > shipping? We are looking for an affordable option for an AP Biology
> > course, as our school does not have the resources to purchase a
> > microcentrifuge. thanks
> >
> >
> >
> > On Tuesday, December 29, 2009 8:58:07 AM UTC-6, Cathal Garvey wrote:
> > Dremelfuge is a rotor designed to fit standard lab microcentrifuge
> > tubes and miniprep/purification columns, to be spun by either a
> > powerdrill or other chuck-loading machine or by a popular rotary
> > tool.
> >
> > Dremelfuge features an easy click-in loading system which holds
> > tubes parallel to the plane of rotation for optimum pelleting and
> > delivery of force.
> >
> > Intended basic applications of Dremelfuge include column
> > purification (tested to work with miniprep columns) and
> > bacterial/cell debris pelleting (under testing). With standard
> > microcentrifuge tubes, the average rotary distance is 4cms.
> >
> > Dremelfuge is open-source hardware. Source files are available on
> > Thingiverse, linked from the items on Shapeways. The Creative
> > Commons license used entitles copying, sharing and remixing for any
> > non commercial purpose. Please consider that professional printing
> > services qualify as commercial use.
> >
> > Two editions of Dremelfuge are available for purchase at
> > www.shapeways.com/shops/labsfromfabs
> >
> > One has an axle which can be gripped in a chuck fitting. The other
> > is intended for fitting to a cutting-disc-holder for rotary tools
> > such as a dremel*.
> >
> > Please share your results and experiences on Thingiverse!
> >
> > Note: Although I have shown Dremelfuge to work at 3000rpm/400rcf,
> > and intend shortly to test at dramatically higher speeds on a
> > low-cost rotary tool, I don't endorse or recommend use of
> > Dremelfuge as anything but an ornament. Dremelfuge poses a serious
> > safety hazard if used for any other purpose. Please take every
> > precaution if you decide to take such risks. Further advice on
> > Thingiverse.
> >
> > *Design assumes a disc holder diameter of 3mm and a screw diameter
> > of 2mm. Other designs available on request.
> >
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