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Old 03-11-2013, 04:34 PM   #1251
ACC84
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Jan 2013
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Built this Saturday. Only change I may do would be to use a 6V wall wort instead of the 9V one I am using currently. I had some issues with it throwing the bar until I started messing around with the height of the fan. I like the machine screws because you can adjust the fan housing and make sure it doesn't get too hot in the enclosure.

Thanks to the OP.

 
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Old 03-14-2013, 12:30 AM   #1252
msujack
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Old 03-17-2013, 08:42 PM   #1253
sethlovex
 
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How do make the wire connections to the pot? What kind of scrap wire do you use? I have some 14 Romex lying around is this too big?

 
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Old 03-17-2013, 11:02 PM   #1254
millsware
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May 2010
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Thanks a lot for the tutorial. I made this a few weeks ago. Did 1 qt. starters this week of WLP 500 and 565. Brewed today and both batches (5 gal each) were going in <4 hours.
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Old 03-18-2013, 04:55 PM   #1255
LovesIPA
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May 2012
Sacramento, CA
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I don't seem to be having as much luck as others. I built mine but I have a few problems/concerns.

First, computer fans are balanced. If you stick a large magnet on top of the fan, what does that do to its life span? Am I going to have to replace the fan every few weeks/months?

Second, I have been playing around with different magnets, different spacing between the fan and the lid on the box, and I have problems throwing the stir bar, even on very low speed. How much of a "cone" do I need in the wort? Or is a gentle stir enough?
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Old 03-18-2013, 05:10 PM   #1256
Olive Drab
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Dec 2007
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Quote:
Originally Posted by LovesIPA View Post
I don't seem to be having as much luck as others. I built mine but I have a few problems/concerns.

First, computer fans are balanced. If you stick a large magnet on top of the fan, what does that do to its life span? Am I going to have to replace the fan every few weeks/months?

Second, I have been playing around with different magnets, different spacing between the fan and the lid on the box, and I have problems throwing the stir bar, even on very low speed. How much of a "cone" do I need in the wort? Or is a gentle stir enough?
A cone is cool looking but not really necessary. the wart just needs to be stirred so some oxygen mixes and most importantly the yeast is always on the move.
to make sure I dont throw the stir bar, I move the flask around until the magnet catches the stir bar and then center the flask. I always start super slow and if need be increase the speed. It took a few minutes for me to find a sweet spot as far as how many magnets and their position so keep messing around until you find one that has enough grab for you. The magnets I bought on the cheap at a junk store didnt want to play nice and kept shifting which drove me nuts. experiment and you will succeed!
Ive been using this since last summer and no issues. I would think it is pretty hard to burn out the fan and if it does, so what? its not that hard or expensive to replace.

 
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Old 04-01-2013, 01:04 AM   #1257
kenais
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Dec 2011
NW Wisconsin
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Has anyone been able to stir a 5L flask with this? Maybe the 8x6 enclosure will work better.

 
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Old 04-01-2013, 03:34 AM   #1258
Huaco
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Quote:
Originally Posted by kenais View Post
Has anyone been able to stir a 5L flask with this? Maybe the 8x6 enclosure will work better.
Yep... Me.

 
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Old 04-02-2013, 05:49 PM   #1259
JayMac
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Jun 2012
Guelph, Ontario
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I just wired everything up. I'm using a 12V supply with my 12V fan. Even at the highest resistance from the potentiometer, my bar still gets thrown.

What's weird is that when there's nothing in the flask, it spins fine. When water is in, it throws?

I lowered the fan as far as I can, but it's still throwing. Should I just throw in a resistor? If so, where is the best place to put it, and what should it be rated for?

Thanks! Can't wait to get this thing tuned!

 
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Old 04-02-2013, 07:53 PM   #1260
mcbaumannerb
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Quote:
Originally Posted by JayMac
I just wired everything up. I'm using a 12V supply with my 12V fan. Even at the highest resistance from the potentiometer, my bar still gets thrown.

What's weird is that when there's nothing in the flask, it spins fine. When water is in, it throws?

I lowered the fan as far as I can, but it's still throwing. Should I just throw in a resistor? If so, where is the best place to put it, and what should it be rated for?

Thanks! Can't wait to get this thing tuned!
You bar might be too big. Try a smaller one if you can get it.
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