rideincircles
Well-Known Member
Still using mine 2 years later. I need to switch out my box I have it in at some point, but it us not a priority and so far my stirplate has had no issues other than the glue coming undone at one point.
Has anyone successfully fired up a 1 gallon wine jug with this setup?
I've got a full gallon jug to pull a funnel all the way down to the stir bar.
Has anyone successfully fired up a 1 gallon wine jug with this setup?
Not sure, but when it didn't work, I tried moving them out to the edge of the washer as well as toward the center of the washer. So far, it still didn't work in any of those three spots.What is the distance between the centers of those two magnets.
I'm betting they are way too far apart for a 1" bar.
And the whole spacing thing is why I just went with the bar magnets...
Cheers!
Need some help please! I got everything built, but it doesn't work.
Need some help please! I got everything built, but it doesn't work. I'm using the Thermaltake fan in thin plastic box from the thrift store. I glued a 1.5" washer on the fan and magnets from Harbor Freight. I have verified that the magnets are positioned so that one is "up" and the other is "down." I have 1" stir bars. The fan spins and everything, but the stir bar doesn't. There seemed to be quite a bit of attraction between the magnets and the fan guard, so I clipped out another ring. Still doesn't work. Any troubleshooting advise would be greatly appreciated. Thank you!
PICTURE
Not sure, but when it didn't work, I tried moving them out to the edge of the washer as well as toward the center of the washer. So far, it still didn't work in any of those three spots.
I had 24 old hard drives that I dumped a few months ago before I decided to build this. I went with the rare earth ones from Harbor Freight since they were recommended by somebody else in the forum (plus they were inexpensive and quick to get), but I'm not sure if they aren't strong enough or there is some magical spacing that I haven't yet discovered...
Probably not strong enough, that was the problem I was having when I couldn't get it to spin.
I used a flat washer and four rare-earth disc magnets. Super glue holds the whole thing together. The magnets are 1 1/8" center-to-center, and it spins a 1.5" stir bar.
Tune the height of the magnets so they barely clear the flask. Millimeters count. I used some bolts and nuts that allow an adjustable height.
[Edit: This is an 80mm case fan and custom LMC555 PWM controller built from spare parts. Not the same innards as the OP's USB fan, but the magnetic path to the stir bar is the same.]
I could only get it to spin the bar in about 4 fl oz of water in an 8 fl oz jam jar about 25% of the time.).
Still never got mine to work...Bumping this old thread. Is anyone who built this cheap stir plate still using it? The fan is still available
I found the best way to place magnets is to stick them to the stir bar
so they'll settle where they want to be, then stick them to the washer.
I use one of these:Mine seems to run fast and splash a lot. Any way to slow it down more?
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