Electronics > Projects, Designs, and Technical Stuff
DIY vibration tumbler fan keeps failing
drummerdimitri:
--- Quote from: TERRA Operative on August 17, 2019, 01:45:26 pm ---
--- Quote from: drummerdimitri on August 16, 2019, 12:43:33 pm ---Any ideas what I would need for this project? By trying not to spend 200$ on an actual vibration tumbler, I am finding myself getting closer in budget to what it would have cost me originally to just buy a real machine :palm:
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Are you using fans with ball bearings or sintered bushings? The bushings will fail quick smart when used like this...
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This is the fan I used last: https://www.aliexpress.com/item/32844553484.html?spm=a2g0s.12269583.0.0.775829e97C9mAT
Have spent around 40$ already on failed fans. This one is dual ball bearing how much better can it get? :palm:
NiHaoMike:
--- Quote from: drummerdimitri on August 17, 2019, 09:51:55 am ---Surely this would be the ideal solution except for having to run my air compressor 24/7.
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Maybe it could be possible to make the ball move using a magnet spun by a BLDC motor? It would decouple the motor bearings from the moving weight. Or perhaps the way to go would be an offset weight held by skateboard bearings with a flexible coupling or belt connecting it to a BLDC motor.
Now I wonder if that ball could be moved with water or oil instead of air. Liquids compress by a negligible amount so no compression losses that make compressed air inefficient. And small pumps for water or oil are pretty cheap and don't need much power.
I suppose a bass shaker might be another solution, not sure how much they would be needed to be derated to run 24/7. Cheapest might be a junk speaker with a little concrete or something to weigh it down.
Mr. Scram:
It seems pretty obvious a fan with bearings and a motor designed for very low highly consistent loading isn't going to last when loaded irregularly with high peaks. It's about the worst motor to pick for this. The problem with these Youtube tutorials is that a large proportion are prototype builds done by people who have no idea what they're doing and who haven't tested or researched anything.
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