DIY Centrifuge

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billbillt
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DIY Centrifuge

#1 Post by billbillt » Sun Nov 27, 2016 6:16 pm

Here is a link to a home made centrifuge that appears to work within it's range of quality..

https://microscopetalk.wordpress.com/pr ... entrifuge/

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Crater Eddie
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Re: DIY Centrifuge

#2 Post by Crater Eddie » Thu Jan 12, 2017 1:53 pm

I just saw this, pretty neat!
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Re: DIY Centrifuge

#3 Post by Johann » Thu Feb 16, 2017 12:38 pm

How about this - much easier to make, looks like it could be fairly effective:

http://news.stanford.edu/2017/01/10/whi ... entrifuge/
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Re: DIY Centrifuge

#4 Post by billbillt » Fri Feb 17, 2017 5:57 pm

Johann wrote:How about this - much easier to make, looks like it could be fairly effective:

http://news.stanford.edu/2017/01/10/whi ... entrifuge/
Thanks for sharing.. I watched the vid, but never saw them centrifuge anything!.. They just talked about how great it is.. I would personally like to see one of these in actual use..

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zzffnn
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Re: DIY Centrifuge

#5 Post by zzffnn » Fri Feb 17, 2017 6:23 pm

Johann wrote:How about this - much easier to make, looks like it could be fairly effective:

http://news.stanford.edu/2017/01/10/whi ... entrifuge/
This is the same Standford lab that built that folding paper microscope.

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Re: DIY Centrifuge

#6 Post by billbillt » Fri Feb 17, 2017 6:53 pm

zzffnn wrote:
Johann wrote:How about this - much easier to make, looks like it could be fairly effective:

http://news.stanford.edu/2017/01/10/whi ... entrifuge/
This is the same Standford lab that built that folding paper microscope.
Well that explains why it did nothing!... The paper scope was useless..

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Re: DIY Centrifuge

#7 Post by Piter_ » Sun Dec 08, 2019 6:05 pm


MicroBob
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Re: DIY Centrifuge

#8 Post by MicroBob » Sun Dec 08, 2019 6:28 pm

Hi together,
this foam plate and bowl rotor will probably work as long as the centrifuge is balanced very well. But as soon as there is a bit of weight difference around the rotor it will have problems to rev up and start to wobble. For a good DIY centrifuge it would be helpful to use a motor with some mass and a stronger shaft as the basis.

I'm no expert in centrifuging but I like my hand crank centrifuge. It uses fairly big sample tubes which I like a lot for my diatom cleaning. One only has to get the start right to avoid beeing hit by the rotor. Many electric lab centrifuges use tiny tubes of perhaps 2ml volume. For me this would not be useful als I start with a much bigger volume.

With DIY centrifuges I would look for safety too: That drill powered wood spoon centrifuge from micscape is nothing I would like to use. When the axis of the drill moves suddenly while centrifugating the whole thing will become quite an experience. :shock:

Bob

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Re: DIY Centrifuge

#9 Post by MicroBob » Sun Dec 08, 2019 6:32 pm

MicroBob wrote:
Sun Dec 08, 2019 6:28 pm
but I like my hand crank centrifuge.
Well, one thing has changed: Our kitchen table has been blocked by an oatmeal flaker and a kitchen grater in the mean time. These hand cranked devices seem to proliferate - beware! :lol:

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Re: DIY Centrifuge

#10 Post by KurtM » Mon Dec 09, 2019 4:56 pm

Bob, I'm with you. I've tried a couple of electric centrifuges for diatom cleaning, and have gone back to my good old hand cranked one. I also use the larger 15 ml tubes, incidentally.

Love the proliferating crank items -- I still use a hand cranked can opener, also have a hand cranked paper shredder. Why, I even hand-crank Model T cars to get 'em started occasionally!
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Re: DIY Centrifuge

#11 Post by MicroBob » Mon Dec 09, 2019 7:05 pm

Hi Kurt,
in some cases I learned to hate these hand cranked things. As a boy I only had a hand cranked drill that really was not much fun to use. Also the typical coffee grinder with its coarse running is not ideal. But a good old brace for removing wood out of tenon holes and the hand centrifuge just work nicely. My wife and one of my sons often use a small electric coffe grinder and they regularly break them. They always find something new that can be stuck into the poor thing. I'm right back from the workshop silver soldering a new blade onto the home made brass hub. :roll: That hand cranked grater is probably more robust.

Bob

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