Deez DIY Magnetic Stirrer
- Thread starter Dietz
- Start date
Wow!!
All parts ready 
All electronics together
The reostat is working really well.
All electronics together
The reostat is working really well.
@Faiyaz Cheulkar My Bru!!! I've been to mantech every day since last Friday for this speed control.
I just picked mine up, and some other things to make this a PROPER Mixer
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How's it one working ?? My one is wobly at high speeds. And I think I need a stirrer.@Faiyaz Cheulkar My Bru!!! I've been to mantech every day since last Friday for this speed control.
I just picked mine up, and some other things to make this a PROPER Mixer
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Ya with the fans I find that it wobbles more if you spin it up without having the stirrer bar on the setup. What did you use to space the Magnets from the fan?
Thats also one of the reasons I needed the upgrade (with the motor and speed control I got this morning). When im done with this it better be able to mix up anything I put out on it
This is what is happening
Three problems I can see,
1- The cup/bowl/container that you are mixing in must be smooth on the bottom to get the stirrer bar to stay on the center.
2- the Wobbeling can be due to the placement of the magnets on the fan, if they are not perfectly center it will wobble or vibrate. Can you send a pic of the Magnets on the fan inside?
3- the polarity of that stirrer bar seems weird because it should stay in one place en rotate.
That was just a test with water that I was doing, I will try with a smoother base bowl.
The magnets were placed on a cup and then the magnets were stuck to the lid. I took everything apart but this pic might give you an idea.
The stir bar is just one of the bar magnets that I got from mantech wrapped in glue.
The magnets were placed on a cup and then the magnets were stuck to the lid. I took everything apart but this pic might give you an idea.
The stir bar is just one of the bar magnets that I got from mantech wrapped in glue.
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Try stacking those Magnets on top of each other instead and then place them in the center. Also you need to get those magnets as close to the top as you can.
The orientation of the poles in your HD magnets is in my edited version of your posted pic, like @Dietz indicated in his post, half of the mag is north the other south.
For this reason you wont be able to stack 2 of them with matched curves either because their poles will repel.
Secondly you cannot use a bar magnet and hope to produce anything resembling a stirring action, its just going to slide around and flip over, compared to a suitable stir bar which rolls as it spins.
Better use a steel rod that is no longer than the magnet length and shrink wrap it with hot glue to seal the ends.
So what's the fix then ??
Remove the Magnets, Stack them ontop of each other and Put that back on the fan in the center.
Then make a stirrer bar as advised by @blujeenz
So made the changes as suggested, placed a harddrive on the bottom to add weight. Made some space between the motor and the magnet using a plastic cap.
One magnet still works fine. But now I need something to test this with. The bar magnet won't work. Let's see if I find a steel bar.
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Woola it works.
But I think I should buy a stirrer bar. The screw driver bit is a little wobly and noisy
But I think I should buy a stirrer bar. The screw driver bit is a little wobly and noisy
Keep me posted! I should be done with mine by 3 AM
Hey guys,, Quick question,, I have a 220v server fan. Which I plan on using to make a stirrer ? Is there a specific pot/rheostat that I need. Tried looking online, but there are far to many different ones out there, Would any work ? or would I need one that could handle 220v ?
Sorry for Hijacking your thread..
Sorry for Hijacking your thread..
Yep, that will happen due to the hex sides and being too long.
Next upgrade is to cut off all the blades flush to the hub, gives more oomph due to less air drag.
Thats a different kettle of fish, you're going to need an AC control for that one, which are kinda pricey.
Something like this.
https://www.rseonlineshop.co.za/products/ac-speed-control-2000-watts?variant=44010997774
You could try a 500w dimmer from a hardware place like Brights, but they are meant for resistive loads whereas your fan is most likely an inductive load.
Communica has a mini kit that you build, called a drill speed controller, R260 odd excl.
http://www.communica.co.za/catalog/Details/P3593765732
Im sure dhat could work, Im not sure on exactly what to ask for but best bet is to call a place like mantech and ask for one that will work with that fan.
Got these for 145 total
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