Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Whats wrong w/ my stir plate?
Reply
 
LinkBack Thread Tools
Old 02-28-2008, 10:58 PM   #1
jcb317
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2007
Location: Bethlehem PA
Posts: 123
Liked 1 Times on 1 Posts

Default Whats wrong w/ my stir plate?

So i just finished up a DIY stirplate project and i am having trouble getting the bar to spin right. Instead of spinning about the center like a propeller, the best i can get with the flask as close to the fan as possible is the stir bar spinning with the fan. Kind of looping around the center of the fan like the moon would rotate around the earth(if you get what i mean) If i run it faster it will just fly off because of the centrifugal force. I tried spacing the flask farther away from the magnet by stacking some thin CD cases underneath with no success.

I have two rare earth magnets mounted on a 120mm fan. One side is N up, other S up. They are spaced roughly 1-1.5" apart from the center of the fan. I am trying to spin a 1" magnet

Any suggestions on how to trouble shoot this? I am guessing it may be something with the magnet placement.

Thanks for the help all

__________________
jcb317 is offline
 
Reply With Quote Quick reply to this message
Old 02-28-2008, 11:00 PM   #2
ShortSnoutBrewing
Kwanesum Chinook Illahee
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
ShortSnoutBrewing's Avatar
Recipes 
 
Join Date: Oct 2007
Location: Portland, OR
Posts: 3,266
Liked 12 Times on 11 Posts
Likes Given: 1

Default

What voltage are you running?

ShortSnoutBrewing is offline
 
Reply With Quote Quick reply to this message
Old 02-28-2008, 11:06 PM   #3
jcb317
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2007
Location: Bethlehem PA
Posts: 123
Liked 1 Times on 1 Posts

Default

I have an adjustable power supply. I tried running at 6 and 12, but i can go down to 3. I am also using a voltage regulator circuit with pot to adjust fan speed.

__________________
jcb317 is offline
 
Reply With Quote Quick reply to this message
Old 02-28-2008, 11:33 PM   #4
eddie
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2007
Location: Hermon, Maine
Posts: 1,084
Liked 2 Times on 2 Posts
Likes Given: 4

Default

Stack the magnets on top of each other.

__________________
eddie is offline
 
Reply With Quote Quick reply to this message
Old 02-29-2008, 12:33 AM   #5
jcb317
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2007
Location: Bethlehem PA
Posts: 123
Liked 1 Times on 1 Posts

Default

Bingo, the "single" magnet (stacking the two instead of having two on the fan hub) did the trick.

Thanks!

__________________
jcb317 is offline
 
Reply With Quote Quick reply to this message
Old 02-29-2008, 02:33 AM   #6
kebrown
Feedback Score: 0 reviews
 
kebrown's Avatar
Recipes 
 
Join Date: Sep 2007
Location: Colonial Heights, Va
Posts: 87
Default

I could not get a single straight bar magnet to stir. I had to buy a magnet that is made like an X. It worked perfect. Good Luck.

__________________

Keg:
Pliny the Elder Clone

Secondary:
Centennial Blonde Ale
Irish Black Ale

Beer Fridge
Pliny the Elder
Saint Arnolds Endevour Double IPA
Three Floyd;s Dreadnaught Double IPA
Three Floyd's Artic Panzor Wolf Double IPA
Stone 16th Anniversary IPA
1 case of Bell's Hop Slam Double IPA
2 cases Sierra Nevada Hoptimum Imperial IPA
Avery Mahraja Imperial IPA
Pliny the Elder

kebrown 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
What Magnets/Stir Bar do you use for your Stir Plate? Stevorino Equipment/Sanitation 28 10-04-2013 06:32 PM
DIY stir plate help foxtrot Chillers and Stir Plates 17 08-25-2012 04:19 PM
How to use a Stir Plate ShortSnoutBrewing Equipment/Sanitation 40 01-29-2008 02:39 PM
WTF is wrong with my stir plate? HarvInSTL Equipment/Sanitation 8 06-28-2007 10:45 PM
DIY Stir Plate homebrewer_99 Equipment/Sanitation 2 01-18-2007 02:06 PM



Newest Threads

LATEST SPONSOR DEALS