Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Homemade stirplate question
Reply
 
LinkBack Thread Tools
Old 02-14-2009, 12:01 AM   #1
kjung
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2008
Location: Chicago Area
Posts: 3,741
Liked 9 Times on 9 Posts
Likes Given: 10

Default Homemade stirplate question

I'm having problems with my new, homemade stirplate. I followed the directions from an article in BYO mag, but still can't get it to work right. Whenever I turn it on, it winds up throwing the stir bar.

Last night, when I first started using it, I had a nice vortex going for about 5 min., so I left it alone. When I checked up on it later, the stir bar was thrown to the side of the flask.

I moved the stir bar back into position, and got it started back up again. I watched again for about 5 min, as it built up a nice vortex once again, and left it. This morning, the bar was once again at the side of the flask.

I have the fan on a speed control, but no matter what I do, I can't get the plate to workright !

Does anyone have any ideas to help ?

__________________

Be careful what you wish for, friend, 'cause I've been to Hell, and now I'm back again- Steve Earle

Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.-
Albert Einstein

"Heroism on command, senseless violence, and all the loathsome nonsense that goes by the name of patriotism -- how passionately I hate them!"- Einstein, again

kjung is offline
 
Reply With Quote Quick reply to this message
Old 02-14-2009, 12:04 AM   #2
Anthony_Lopez
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
Anthony_Lopez's Avatar
Recipes 
 
Join Date: Mar 2008
Location: Groton, MA
Posts: 1,693
Liked 17 Times on 8 Posts
Likes Given: 2

Default

I would try balancing the magnet on the fan more precisely. If you look at the link in my signature for my build, I use a steel washer to get the magnet perfectly centered. I would also suggest trying a stronger magnet setup. This might aid in keeping the stirbar from throwing. Read through my thread, I have helped a lot of people get theirs figured out.

__________________

I'd rather have a bottle in front of me, than a frontal lobotomy.
--Tom Waits

You can't be a real country unless you have a beer and an airline - it helps if you have some kind of a football team, or some nuclear weapons, but at the very least you need a beer.
--Frank Zappa

My Cheap and Easy Stirplate

Anthony_Lopez is offline
 
Reply With Quote Quick reply to this message
Old 02-14-2009, 12:05 AM   #3
Brewers Hardware
Sponsor
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2008
Location: Orange County, CA
Posts: 455
Liked 6 Times on 5 Posts

Default

Your vortex should be pretty slight. you don't need a big tornado down to the bottom of the flask. your vortex is probably hitting the stir bar and knocking it off. All ou need is a slight dimple in the surface for a stir plate to do what it needs to do. It just needs to keep the yeast in suspension and drive off CO2.

__________________
Brewers Hardware is offline
 
Reply With Quote Quick reply to this message
Old 02-14-2009, 12:17 AM   #4
kjung
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2008
Location: Chicago Area
Posts: 3,741
Liked 9 Times on 9 Posts
Likes Given: 10

Default

The magnet on the fan is as centered as I can get it. What is really perplexing me now is that it looks like the stir bar is just spinning (as in rolling over) instead of rotating with the fan.

__________________

Be careful what you wish for, friend, 'cause I've been to Hell, and now I'm back again- Steve Earle

Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.-
Albert Einstein

"Heroism on command, senseless violence, and all the loathsome nonsense that goes by the name of patriotism -- how passionately I hate them!"- Einstein, again

kjung is offline
 
Reply With Quote Quick reply to this message
Old 02-14-2009, 01:54 AM   #5
Brewers Hardware
Sponsor
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2008
Location: Orange County, CA
Posts: 455
Liked 6 Times on 5 Posts

Default

Quote:
Originally Posted by kjung View Post
The magnet on the fan is as centered as I can get it. What is really perplexing me now is that it looks like the stir bar is just spinning (as in rolling over) instead of rotating with the fan.
..

Ah ha! So the magnet is spinning (sort of) on its axis instead of rotating? Sounds like the drive magnet polarity is on the same axis as the fan rotation instead of on the same plane. So the N-S poles are vertical instead of horizontal.
__________________
Brewers Hardware is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Stirplate build......voltage question. tcMonk DIY Projects 8 10-28-2009 06:46 PM
Stirplate Vortex Question Skipstr21 General Techniques 8 03-22-2009 06:48 AM
Stirplate Starter Question Milhouse General Techniques 2 03-15-2009 05:32 PM
Stirplate Question ejdischer Beginners Beer Brewing Forum 2 01-13-2008 03:48 PM
stirplate question nduetime Equipment/Sanitation 9 12-08-2007 05:31 AM