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Old 11-30-2012, 10:43 PM   #71
mdfairbairn
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Jan 2009
Lakeside Park, KY
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Quote:
Originally Posted by tre9er

Did it work?
Get home tomorrow ...
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Old 12-09-2012, 05:42 AM   #72
rajun50
 
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Oct 2009
Greensboro/Tuscaloosa, Alabama
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Just an FYI: I noticed that if you disconnect the speed control unit from the fan, it will run slower. That may be helpful for smaller starters.

 
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Old 12-10-2012, 01:56 AM   #73
ObiDon
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Nov 2012
San Francisco Bay Area, CA
Posts: 24


After reading this thread last week, I immediately went to Amazon and purchased the Thermaltake usb fan unit and I couldn't be happier.

I completely removed the fan shroud and the speed control knob. The fan was attached to the base of the box using double sided sticky tape. I used the box that my RAZR Maxx came in for the case. I punched a hole in the box for the speed control knob to stick through and just used a bit of crazy glue on the back side to hold everything in place. I punched another hole out the back for the power cable.




The washer the hard drive magnet is attached to is held to the fan by double sided sticky tape. I used it with a 1" stir bar to whip up my last 1L batch of starter and it worked great!


Even on low, this DYI stir plate has no problem creating a vortex.



Thanks for the tip!


Don

 
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Old 12-10-2012, 07:00 PM   #74
tre9er
 
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Jan 2012
Lincoln, NE
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Quote:
Originally Posted by mdfairbairn View Post
Get home tomorrow ...
OK, did it work
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Quote:
Originally Posted by davekippen View Post
Open log Fermenting and gas-can secondary?? I am planning my next brew right now!!

 
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Old 12-13-2012, 02:54 AM   #75
apshaffer
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Jun 2010
olympia, wa
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My stir bar is rolling rather than spinning. I'm using one magnet from a hard drive and a 2" stir bar that I grabbed from the lab at work. Think the stir bar is too big? It does have a rib in the middle. It rolls around then throws the bar. Any thoughts? I'll see if they have a smaller bar tomorrow.

 
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Old 12-13-2012, 04:25 AM   #76
ObiDon
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Nov 2012
San Francisco Bay Area, CA
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Quote:
Originally Posted by apshaffer View Post
...It rolls around then throws the bar. Any thoughts?...
Have you tried adjusting the distance between the magnet and the stir bar? I had to muck about with mine for a bit before I got it just right.

Don

 
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Old 12-13-2012, 03:23 PM   #77
tre9er
 
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Jan 2012
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Quote:
Originally Posted by ObiDon View Post
Have you tried adjusting the distance between the magnet and the stir bar? I had to muck about with mine for a bit before I got it just right.

Don
Yeah, try adjusting the distance with shims under the flask first, to increase it, and run the fan on the slowest speed. If more distance isn't the answer, perhaps it's less.
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Quote:
Originally Posted by davekippen View Post
Open log Fermenting and gas-can secondary?? I am planning my next brew right now!!

 
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Old 12-13-2012, 09:41 PM   #78
barrooze
 
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Jan 2009
Pearland, TX
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Quote:
Originally Posted by apshaffer View Post
My stir bar is rolling rather than spinning. I'm using one magnet from a hard drive and a 2" stir bar that I grabbed from the lab at work. Think the stir bar is too big? It does have a rib in the middle. It rolls around then throws the bar. Any thoughts? I'll see if they have a smaller bar tomorrow.
If you have another HD magnet, try putting it on top of the one you already have on the fan. This worked wonders for me. I don't know if it was the increased magnetic field or the reduction in distance between the bar and the magnet, or both. Either way, I don't through my bar anymore.
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Old 12-13-2012, 09:53 PM   #79
ObiDon
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Nov 2012
San Francisco Bay Area, CA
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Quote:
Originally Posted by apshaffer View Post
...It rolls around then throws the bar. Any thoughts?...
The other thing I did was to slip two O-rings onto the stir bar. I'm not sure if that played any part in getting it to spin properly. It sure is quiet now though. :-)

Don

 
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Old 12-14-2012, 12:05 AM   #80
apshaffer
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Jun 2010
olympia, wa
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I figured it out. I wasn't letting the magnet and the stir bar align before turning on the fan. I also grabbed a smaller stir bar which works much better.

 
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