"You have the freedom to use OSSI-Pledged seeds in any way you choose. In return, you pledge not to restrict others' use of these seeds or their derivatives by patents or other means, and to include this pledge with any transfer of these seeds or their derivatives."

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Open-Source, DIY Seed Cleaner Plans

Released for the benefit of small independent seed producers.

This design combines traditional zig-zag aspirator design with a 'swirl chamber' just below take-off

to allow repeated sorting of each seed as it is poured though.

Suitable for small seed (poppy, amaranth) to medium seed (squash, sunflower)

Construction cost was less than 5 GBP using scrap materials.

Using purchased materials cost would be under 50 GBP.

Remember though that this is only designed for small-scale batches: lots of a few grams to 10kg or so.

Bigger than that you'll need a different solution because the square-rule law applies - if you double the size you'd need 4 x the suction!

If you make one, please email us a picture of yours! We'll put them up here.







Seed Cleaning Machine Design by The Real Seed Collection Ltd

is licensed for public use under a

Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Important - read the link above before you make one.

Basically you can make one for your own use,

but you have to tell people where you got the plans (including a link to us),

and can't sell copies of the machine for a profit.

You are free to adapt the plans and improve it - but the same rules then apply to the new design. Thanks! Ben.

If you would prefer dimensions in inches, George Adams of Wisconsin USA has kindly sent in a relabelled diagram.

NOTE 1: The bottom right chaff emptying flap needs to be airtight or the cleaner will not work.

But it also needs to be easily removeable so you can dump out the chaff quickly - you will need to do this quite often often,

for example when you suck good seed out by mistake and want to put it through again.

Ours is held on by 4 small supermagnets glued in holes in the wood.

Matching magnets set in the body of the cleaner attract it on firmly ; if the bottom of the cleaner is smooth it is airtight.

We have a tray / tub under it this flap, so we can just pull it open and all the seed falls into the tray for recycling if needed.

NOTE2: Don't be tempted to 'improve' the plans! If you build it exactly as the plans say it will work really well.

If you change anything, it might work better, but it will probably not work at all. Once you've built one and got a feel for how it works,

then of course you can play around with the design and maybe improve it some more.

AND HERE ARE SOME THAT PEOPLE HAVE MADE FROM OUR PLANS, ALL OVER THE WORLD: