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Old 03-05-2012, 12:33 AM   #11
klyph
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Dec 2009
North Pole, Alaska
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I thought one benefit of a stir plate is that it keeps the starter aerated with the vortex to maximize yeast reproduction. Don't you want it to keep pulling a little air in?
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Old 04-17-2012, 03:06 PM   #12
haeffnkr
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Jan 2010
St Peters Mo, MISSOURI
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Hello,
I used this thread to make my DIY stir plate.
I bought the fan and magnets listed by the flowmaster.
Worked Great.
Thanks for posting this how to !!!

Tips for the next guy -
Mount the magnets on the washer first..... a little super glue and the magnets will be TIGHT to the washer, so measure/mark the spot and drop it on... just need to glue the first one and put the next 2 on top of the first.
Make sure you have half of the magnets North pole up and the others south pole up so the stir bar will stick good to the fan magnets.

Run the fan in the enclosure and while the fan is running...use a sharpie to mark a circle, about 3/4" in Dia. This will help you find dead center of the fan and assist you in glueing the magnet to the center of the fan.
I believe I used a 3/4" washer that measured about 1.5" outside Dia.

I am using 1.5" stir bar I found on Amazon when I bought the fan and magnets.

An old Corny keg lid O ring makes a good spacer to keep the flask/jar off the magnets (if the magnets stick up above the wood like mine did) and keeps things from rattling around. (not shown in my pics)






thanks again to FlowMaster -

Kevin

 
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Old 04-17-2012, 09:59 PM   #13
Old_mil_guy
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Oct 2011
Worcester, MA
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How about gluing the magnets directly to the fan hub without the washer?

 
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Old 04-17-2012, 10:35 PM   #14
haeffnkr
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Jan 2010
St Peters Mo, MISSOURI
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I dont believe the fan hub is wide enough...dont remember ... but that is what flomaster used so I did it to.... but if you can get the magnets wide enough to match your stir bar, I guess that would work fine.


thanks Kevin

 
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Old 04-17-2012, 10:42 PM   #15
MeadLover
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One advantage to using a washer requires using a ferrous washer. That's not having to use glue for the magnets. They hold themselves on the washer. That way, if you happen to put them both on there the same way, you just have to flip one over. You know, since the magnets should be opposite poles up. Or maybe you decide to use a bigger or smaller stir bar, just move the magnets.
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Old 04-17-2012, 11:04 PM   #16
Old_mil_guy
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Oct 2011
Worcester, MA
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That makes sense.

 
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Old 04-19-2012, 12:53 PM   #17
TaylorInOK
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Feb 2012
Broken Arrow, OK
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Wow great find! Just in time to build my stir plate. Ordered. Thanks!

 
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Old 04-19-2012, 02:30 PM   #18
Special Hops
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Jun 2008
Kanatenah
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Wow great idea. This sounds easier then building one from PC fan.
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Old 04-19-2012, 04:18 PM   #19
camiller
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Apr 2007
Omaha, NE
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Quote:
Originally Posted by MeadLover View Post
One advantage to using a washer requires using a ferrous washer. That's not having to use glue for the magnets. They hold themselves on the washer. That way, if you happen to put them both on there the same way, you just have to flip one over. You know, since the magnets should be opposite poles up. Or maybe you decide to use a bigger or smaller stir bar, just move the magnets.
Just thought I mention this, but I initially thought the strength of the magnet would keep it in place on the washer as well. On my second starter the magnet had begun to creep ever so slightly eventually getting far enough out of alignment that the stir bar kept getting thrown. After I got everything re-aligned a little hot glue has kept everything in place since.

 
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Old 04-19-2012, 04:20 PM   #20
haeffnkr
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Jan 2010
St Peters Mo, MISSOURI
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Quote:
Originally Posted by camiller View Post
Just thought I mention this, but I initially thought the strength of the magnet would keep it in place on the washer as well. On my second starter the magnet had begun to creep ever so slightly eventually getting far enough out of alignment that the stir bar kept getting thrown. After I got everything re-aligned a little hot glue has kept everything in place since.

Yep - been there... done that !

 
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