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Static
greencardigan
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Posted on 04/11/2011 10:50 PM
Hi all,

I have a Sunbeam Cafe Series conical burr grinder and I'm have problems with the ground coffee coming out with static. The ground coffee come out and goes everywhere like it has a mind of it's own.

It seems my home roasts are significantly worse than purchased beans. Any ideas why this would be?

http://www.sunbea...x?pid=1120
 
JETROASTER
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Posted on 04/12/2011 10:32 AM
Check to make sure it's properly grounded. For my commercial grinders I had to add grounding straps to the exit chute and the transfer tubes to get rid of the static.
Some coffees (in a light rst) have some skin caught in the crease....the stuff flies everywhere.
Good Luck! Scott
 
ginny
Top  #3 Print Post
Posted on 04/12/2011 4:21 PM
Green C:

this is not an issue limited to you...

it is a pain no question. While I agree with Scott on grounding I think it also has to do with the material your grinder house is made of - plasctic, some other poly and backlite along with other material like that love lint! aka static!

the amount of beans you have in the grinder along with the heat generated also will give you static. my guess would also be the depth of your burrs. will look at the link you provided but in the men time cover your face dude!!

as far as home roasted v. store bought remember that those store bought are months if not years old!! not much to get excited about even in the grinder!!

maybe there is a new product here for us:

perhaps we can develop a little "static free" add to your grinder beanie. Like the
dryer thingies they use so your clothes don't stick together...

Free Beanie...

ginny

thanks for the post Green C
 
Koffee Kosmo
Top  #4 Print Post
Posted on 04/12/2011 6:01 PM

Quote

greencardigan wrote:
Hi all,

I have a Sunbeam Cafe Series conical burr grinder and I'm have problems with the ground coffee coming out with static. The ground coffee come out and goes everywhere like it has a mind of it's own.

It seems my home roasts are significantly worse than purchased beans. Any ideas why this would be?

http://www.sunbea...x?pid=1120


Happens a lot in my part of the world (QLD)
Mate static is mostly caused by weather conditions
Doesn't matter if its plastic or steel

Now having said that it happens more with doserless grinders

KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...ad_id=1142

https://docs.goog...lide=id.i0
Blog - http://koffeekosm...gspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
 
Web
opus
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Posted on 04/12/2011 7:56 PM
Lots of static here too.
castironcoffee.com
 
Web
greencardigan
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Posted on 04/12/2011 8:23 PM
I'm wondering if air roasters somehow result in more static?
 
Koffee Kosmo
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Posted on 04/12/2011 9:35 PM

Quote

greencardigan wrote:
I'm wondering if air roasters somehow result in more static?


Its possible

Sunbeam has a special silicone spout for your grinder to help guide coffee grounds to your PF basket

KK
Edited by Koffee Kosmo on 04/12/2011 9:36 PM
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...ad_id=1142

https://docs.goog...lide=id.i0
Blog - http://koffeekosm...gspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
 
Web
Third Crack
Top  #8 Print Post
Posted on 04/13/2011 6:58 AM
My experience is similar. The weather is a big issue as mentioned. Static is dissipated through the air better as the humidity goes up. So in winter the problem is worse. Baratza grinders started making the collection vessel with a conductive coating to help the static bleed off to ground. It helps some. So materials all the way through the construction and how they are grounded will make a difference. The speed of the grinding will make some difference. Basically static is created whenever two dissimilar materials move against each other and the higher the speed the more the static. Seems to me that grinders with larger, slower RPM burrs tend to give less static. I agree with the chaff being a big problem since it is so light and flies around due to static more easily.
So its easy to see why there is static but difficult to totally eliminate it when grinding is basically a static generator.
Bob
 
John Despres
Top  #9 Print Post
Posted on 04/13/2011 7:17 AM
I get static from my wife when the chaff flies around the kitchen.

I spent a lot of time discussing this very subject with Kyle at Baratza. In face, he took a lot of time and work to try and end static in grinders, and in truth, he's done a pretty good job with the static free collection chamber. It's the only grinder I can think of that has addressed the issue.

John
Respect the bean.
John Despres
Fresh Roast 8, Gene Cafe, JYTT 1k, Quest M3, Mazzer Mini, Technivorm, various size presses and many more brewers.
 
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seedlings
Top  #10 Print Post
Posted on 04/13/2011 8:17 AM
Winter, dry, I have some static trouble. Summer, humid, no static.

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
JimH
Top  #11 Print Post
Posted on 04/13/2011 5:40 PM
I've noticed a really big difference in static problems based on the material of the container you grind into. When I grind into plastic, the static is insane. When I grind into metal, the static virtually disappears. Therefore, my receptacle of choice is a tin cocktail shaker. The more charged particles stick to the sides rather than blowing back onto the grinder and after a few seconds, a light tap will drop them to the bottom.

Jim
 
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