Home Brew Forums > Home Brewing Beer > DIY Projects > Chillers and Stir Plates > DIY Stir Plate Question
Reply
 
Thread Tools
Old 07-03-2012, 05:23 AM   #1
brewzofo1
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2011
Location: huntington beach, ca.
Posts: 67
Liked 1 Times on 1 Posts

Default DIY Stir Plate Question

I'm putting togeather a Stir Plate from many resorces online and here. I did a temporary wire of all the connections before making them permenant. I turn the switch on and the stir plate runs. But it only runs on one speed. I turn the potentiometer and nothing happens. All the wiring is correct. Sometimes I have to give the fan a push to get it going. And to me the fan seems to run too slow. The fan is a 4 x 4 size and 12v I bought at Fry's. Is the fan no good? Or did I miss something.


brewzofo1 is offline
 
Reply With Quote
Old 07-03-2012, 06:24 AM   #2
slamram99
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2011
Location: baton rouge, Louisiana
Posts: 21
Default

what is your power supply specs?


slamram99 is offline
 
Reply With Quote
Old 07-03-2012, 06:27 AM   #3
Chefencore
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Columbus, OH
Posts: 345
Liked 7 Times on 7 Posts
Likes Given: 3

Default

Could be a few things. Disclaimer - I am not an electrician, or an engineer, and am in no way qualified to speak on this subject, other tan having built a stir plate, and destroyed a few power sourced and fans in the process.

I too had to spin the fan to get it going a few trys. Is there anything attached to it yet, like washers/magnets?

It could be wired incorrectly (like i said - destroyed a lot of components).

The switch/potentiometer might not be able to pass enough power to turn the fan. I opted for no switch just to get as much amps as possible pushed thru to the fan.

Could you take a picture of your wiring, and include any specs on the switch/ potentiometer?
__________________
"What do you use to weigh down your hop spider?"

"Hops..."
Chefencore is offline
 
Reply With Quote
Old 07-03-2012, 06:40 AM   #4
brewzofo1
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2011
Location: huntington beach, ca.
Posts: 67
Liked 1 Times on 1 Posts

Default

I am an electrician. I work with schematics. Power supply is 12v. I started off with a 5v cord and found a 9v cord. Then the 12. Yes I have a washer and magnets glued to the fan.
brewzofo1 is offline
 
Reply With Quote
Old 07-03-2012, 09:21 AM   #5
ARKAY
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2011
Location: PORTLAND, OR
Posts: 23
Default

if your wires are hooked up right then it could be a busted pot. does the fan go faster if you connect it directly to power? If so I'd say get a new pot. I assume you used a 1/4w part.
ARKAY is offline
 
Reply With Quote
Old 07-03-2012, 09:54 AM   #6
tracyk
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
tracyk's Avatar
Recipes 
 
Join Date: Feb 2012
Location: Down the road with the crickets and the frogs, TX
Posts: 197
Liked 29 Times on 26 Posts
Likes Given: 2

Default

I built mine with a 120mm fan also from Frys, but ended up using a 9v 300ma power supply that I had sitting around. This gave me the best range of speed with the Rat Shack pot. Even though I also tested it out with a 6v 300ma power supply, it did not give me enough speed on my fan to create a vortex to just stir water when testing.
tracyk is offline
 
Reply With Quote
Old 07-03-2012, 02:17 PM   #7
TheGAC
Beer GOOOOD! Napster BAD!
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
TheGAC's Avatar
Recipes 
 
Join Date: Dec 2007
Location: Keizer, Oregon
Posts: 179
Liked 4 Times on 4 Posts
Likes Given: 37

Default

I know that when I built my stir-plate, I had to put multiple washers in between the magnet and the fan. My magnets were strong enough that they stopped the fan from spinning.
__________________
Blackened Brew
Keizer, Oregon

Primary: WTF, it's empty!
Secondary: WTF, it's empty!
On-tap: WTF, it's empty!
On-deck: Raging Red Irish Ale
TheGAC is offline
 
Reply With Quote
Old 07-03-2012, 04:22 PM   #8
brewzofo1
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2011
Location: huntington beach, ca.
Posts: 67
Liked 1 Times on 1 Posts

Default

Okay. I changed out the fan. I found a smaller fan lying around the house. I think it's like 3". So I connected it to the stir plate and everything works fine now. Rheostat works like it suppose to. Thank you guys n gals. I hope to be brewing my next Pliny batch this Saturday.


brewzofo1 is offline
 
Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Another stir plate Question blaze379 Chillers and Stir Plates 7 06-20-2012 07:26 PM
Stir Plate Fan Question Coastie Chillers and Stir Plates 7 05-01-2012 10:39 AM
Stir Plate Question...way too HOT Catnip_X07 Chillers and Stir Plates 17 11-20-2010 02:25 PM
DIY Stir-Plate Question! INeedANewHobby Chillers and Stir Plates 12 03-11-2009 05:56 PM
Stir plate question redtail28 Chillers and Stir Plates 5 12-29-2007 05:14 AM


Forum Jump