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Discussions > Coffee > Home Roast > not cracking  
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triathlon61
Senior Member


Joined: 4 Jan 2006
Posts: 26
Location: Ottawa, Canada
Expertise: Just starting

Espresso: La Spaziale Vivaldi I
Grinder: Mini Mazzer
Roaster: RK Drum
Posted Thu Jan 16, 2014, 4:02pm
Subject: not cracking
 

I am using a RK drum and I am getting around 500 degrees on the BBQ and after 20 minutes, still no cracking!! Any ideas?
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frcn
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frcn
Joined: 23 Dec 2001
Posts: 3,354
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
Posted Thu Jan 16, 2014, 4:11pm
Subject: Re: not cracking
 

What do the beans look like? The temperature in the BBQ matters not. It's the bean temperature that counts.
20 minutes is a REALLY long time to roast coffee.. too long by about 5 or 6 minutes.

 
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triathlon61
Senior Member


Joined: 4 Jan 2006
Posts: 26
Location: Ottawa, Canada
Expertise: Just starting

Espresso: La Spaziale Vivaldi I
Grinder: Mini Mazzer
Roaster: RK Drum
Posted Thu Jan 16, 2014, 4:26pm
Subject: Re: not cracking
 

They are brown.
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frcn
Senior Member
frcn
Joined: 23 Dec 2001
Posts: 3,354
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
Posted Thu Jan 16, 2014, 6:44pm
Subject: Re: not cracking
 

"Brown" could mean unroasted decaf. Let's be more specific. See:
  https://www.sweetmarias.com/library/content/using-sight-determine-degree-roast

 
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triathlon61
Senior Member


Joined: 4 Jan 2006
Posts: 26
Location: Ottawa, Canada
Expertise: Just starting

Espresso: La Spaziale Vivaldi I
Grinder: Mini Mazzer
Roaster: RK Drum
Posted Fri Jan 17, 2014, 3:02pm
Subject: Re: not cracking
 

They look roasted. Not decaf beans. Could it be that they are too old (1year)?
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frcn
Senior Member
frcn
Joined: 23 Dec 2001
Posts: 3,354
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
Posted Fri Jan 17, 2014, 5:34pm
Subject: Re: not cracking
 

I have roasted beans older than one year- maybe three but we never new since they were bought in a bulk purchase, found at the bottom of a warehouse pile. At the end, when they were too old, the beans were yellowish and getting sort of soft. I tried to get something drinkable out of them and they ignited.
I refer you to THIS CHART of color samples.

 
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TimEggers
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TimEggers
Joined: 3 Oct 2004
Posts: 2,946
Location: Tiskilwa, Illinois
Expertise: I love coffee

Espresso: QM Anita, Cappuccino Amore
Grinder: Baratza Vario, Mazzer SJ
Vac Pot: Antique McKee, Santos
Drip: Pour Over, Bodum Presses
Roaster: RK Drum
Posted Sat Jan 18, 2014, 12:24pm
Subject: Re: not cracking
 

Up your temps.

 
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steamer
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steamer
Joined: 11 Feb 2005
Posts: 896
Location: socal
Expertise: I live coffee

Espresso: Expobar Brewtus IV R
Grinder: Mazzer Mini-B Baratza...
Vac Pot: Krubs Moka Brew, vacPot
Drip: TechV, and many more
Roaster: Hottop
Posted Sun Jan 19, 2014, 9:27am
Subject: Re: not cracking
 

Is this something new or is it your first try at roasting? 500 deg is enough, whats the temp at the mid level of the bbq. How many pounds are you roasting in a batch. Have you heard cracking before with the same setup?
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TimEggers
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TimEggers
Joined: 3 Oct 2004
Posts: 2,946
Location: Tiskilwa, Illinois
Expertise: I love coffee

Espresso: QM Anita, Cappuccino Amore
Grinder: Baratza Vario, Mazzer SJ
Vac Pot: Antique McKee, Santos
Drip: Pour Over, Bodum Presses
Roaster: RK Drum
Posted Sun Jan 19, 2014, 10:15am
Subject: Re: not cracking
 

steamer Said:

Is this something new or is it your first try at roasting? 500 deg is enough, whats the temp at the mid level of the bbq. How many pounds are you roasting in a batch. Have you heard cracking before with the same setup?

Posted January 19, 2014 link

No, 500F in a grill roaster is not enough.  If his coffee isn't cracking the temp is too low.  I start with the grill temps close to 575F (measured in grill).  In my grill anything less than 520F (one pound batch) is too low.

Raise your temps or use less coffee per batch.  You could preheat your drum too.  The RK Drum can be an amazing roaster, but you have to listen to the coffee and not follow roasting logic for other setups.  Going above 520F in other methods is a huge no-no, for the RK Drum its required and will not harm the coffee.  The RK Drum has next to no air flow so the temp has to be higher.  I'll do two pound loads just shy of 580F, first crack at 9-10 minutes and pull the coffee close to 12-14 minutes, no scorching, no tipping and proper color.  Tastes awesome.

Listen to the coffee, if after 20-minutes its not cracking, your too cool.  Up those temps.

 
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flathead1
Senior Member


Joined: 23 Jul 2005
Posts: 72
Location: Mississippi Coast
Expertise: I love coffee

Espresso: Anita, La Pavoni pro, 67...
Grinder: Macap M4, Lelit 53, Solis...
Drip: Bodium Press
Roaster: I-Roast1, Behmor, RK Drum
Posted Sun Jan 19, 2014, 1:13pm
Subject: Re: not cracking
 

I wasn't sure from your post. Is 500F the max you are getting on your grill, if so did you close the vent on the back with some sheet metal?
Where are you measuring? I measure temp at the top of the grill cover and like Tim I run 2.5lbs at abt 575-590F. First crack abt 9-12 minutes and second at 13-16. 20 minutes is too long, by that time I would be throwing the flaming drum on the lawn and hosing it down with the garden hose (yes I've really done this (Thank you Ove Gloves)).
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