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01/24/2021 12:53 AM
Facebook Login is fixed. 
01/12/2021 6:15 PM
@Nomad As a general rule Roasting should not exceed 20 min to second crack What you are describing is baking
12/31/2020 2:39 PM
I trying another 2 cups at 200 for 45 min
12/31/2020 2:38 PM
I have a questions.. im trying to experiment with riasting.. i roasted 3 cup of nicaraguan at 200 degrees for 1 hr and 30 min.. is that to long?
12/17/2020 11:16 AM
Snow again in NC.
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 Building a roaster
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| Henrikp |
Posted on 01/09/2021 6:00 AM
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 Newbie  Posts: 2 Joined: January 09, 2021 |
Does anyone have link or drawings for building a roaster ?. |
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| renatoa |
Posted on 01/09/2021 7:52 AM
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Administrator  Posts: 1549 Joined: September 30, 2016 |
Type, capacity, heat source ? |
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| Henrikp |
Posted on 01/09/2021 8:53 AM
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Newbie Posts: 2 Joined: January 09, 2021 |
Type i am in doubt, about 600 grams in capacity, electrical heart source |
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| renatoa |
Posted on 01/09/2021 9:05 AM
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Administrator Posts: 1549 Joined: September 30, 2016 |
A turbo oven lid based setup is the simplest and most effective solution you can approach. Check for KKTO/SCTO/"turbo oven coffee roasting" acronyms. |
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| jkoll42 |
Posted on 01/09/2021 3:25 PM
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 1 1/2 Pounder  Posts: 856 Joined: February 14, 2011 |
Heat Gun Bread Machine would be in your capacity range as well
-Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3 |
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| renatoa |
Posted on 01/10/2021 3:00 AM
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Administrator Posts: 1549 Joined: September 30, 2016 |
Average roasted coffee density is 432 grams per liter, so you will need a larger model, at least 1.5 l capacity to fit the beans when level, significantly more if you don't want them spill when agitated. The 1:6 rule used for drums would say you need a 3.6 l roasting chamber. |
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| jkoll42 |
Posted on 01/10/2021 6:28 AM
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1 1/2 Pounder Posts: 856 Joined: February 14, 2011 |
Quote renatoa wrote: Average roasted coffee density is 432 grams per liter, so you will need a larger model, at least 1.5 l capacity to fit the beans when level, significantly more if you don't want them spill when agitated. The 1:6 rule used for drums would say you need a 3.6 l roasting chamber. If you are talking about a HGBM a standard (in the states they are called 2 pound models) bread machine has more than enough enough capacity for that bean load with agitation. I roasted for years with this setup - it's still retired in my basement. -Jon
Honey badger 1k, Bunn LPG-2E, Technivorm, Cimbali Max Hybrid, Vibiemme Double Domo V3 |
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| renatoa |
Posted on 01/10/2021 7:38 AM
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Administrator Posts: 1549 Joined: September 30, 2016 |
The large machine you wrote above seems to have 3 litres, indeed it is good for 500 grams of greens: https://www.doves...d-machines However, I feel the need to clarify this size requirement... there are also thermal issues beyond canister capacity. The same reasoning that led to the 1:6 rule apply here, and for all roast machines as well. To perform the roast, coffee beans needs a given energy to be transferred from hot air. The energy stored in air is a factor of volume and temperature, (and other physics constants we can't change). If you reduce the air volume, the only way to raise the beans temperature at right rate, is to raise air temperature. But we have the 270 C limit, where cellulose melt, and bean matrix suffer damages. I seen a lot of people claiming they roast a pound in the small model machine, the 800 grams model, that is predominant here in Europe, omitting the little detail they dial their hotgun well above 300-330 C, which is torture, not roasting, imo. If needed, another confirmation of the above comes from a commercial roaster: Gene glass has 1.5 l volume, why not load it more than 250g ? Rule 1:6  |
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