Testing Zig-Zag Seed Cleaner with black oil sunflower seed to differentiate by size

Original Design by Real Seeds:
www.realseeds....
Fabrication Document here: urbanmicro.ca/...
Shared under Creative Commons License: Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)

[@fishmut]

I made one like this and I found you just got to adjust the vacuum air flow , i inspect the husk waste from the seed and adjust the air flow, if to many seeds maybe it’s to strong in the vacuum, the seed collection I check as well to see the vacuum is doing it’s job removing light husk and waste from the seed and adjust from that really, very good seed sorter and saves a lot of time trying to do it yourself the older fashion way for sure.

[@larryboylarry5557]

very nice!

[@dietrevich]

Hi, you could also try weighting the rejects vs the ones the went through on a digital scale. As you said, size is not an indicator of density, as this is what your separator does, separate seed based on weight.

[@realseeds750]

seperation on density actually, which is often related to seed quality, as opposed to weight.

[@dietrevich]

@@realseeds750 @Real Seeds I don't see how this contraption could distinguish volume to separate based on density. It is the weight regardless of seed shape that causes the separation.

[@realseeds750]

@@dietrevich no problem to explain: the seed falls downwards with a force due to mass (gravity), against an airstream that is moving upwards, which exerts a force (wind resistance) based on the cross-sectional area. The net force therefore varies with density of the objects, giving a density-based seperation.
So it can seperate identically sized seeds some of which are less vigourous (more hollow due to less endosperm and therefore less dense), but cannot seperate a mix of all good but different sized full seeds as they are all the same density.

[@paullemay3218]

Thank you for sharing. I assume you purchase your seeds from Mum’s ?😎🇨🇦

[@MicrogreensLab]

Yes - and the Italian seeds are consistently inconsistent...

[@paullemay3218]

Agreed. I would like to find another source in Canada but have not found one.

[@shazzzam79]

@@paullemay3218 I'm suffering from this same seed... This would definitely change the price of my sunflowers, as I would have to add the time it takes to do this and clean this machine.... It's a good idea, but consumes space and time.

[@tomzipp1274]

How did you go about cutting the wedges ?

[@MicrogreensLab]

Mitre saw and 2x4s