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Homeroasters - Home Roasting Coffee Community » BUILDING A ROASTER » Drum Roasters

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Control for drum roaster
BobbyS	#1 Posted on 05/25/2017 6:11 PM
1/4 Pounder Posts: 179 Joined: July 02, 2011	Does a drum roaster respond fast enough for PID control?


Ringo	#2 Posted on 05/31/2017 7:07 AM
Pounder Posts: 474 Joined: January 14, 2010	Yes, most commercial drums have pid control. This is an update I want to make to my drum someday. I believe I could have more consistent results with pid. All you need in life is ignorance and confidence, and then success is sure. Mark Twain


renatoa	#3 Posted on 05/31/2017 7:20 AM
Administrator Posts: 3104 Joined: September 30, 2016	Be careful to evaluate if a roaster is really a drum roaster... the presence of a drum don't make it automatically a drum roaster. The true nature of a roaster is the predominant source of the heat. Could be hot air, and drum only an agitation method. In this case is a convection roaster, and air temp response to PID is very good. Roasters: DIY: TO based IR 200-640g Commercial, moded: Skywalker, Dieckmann RoestMeister, Nesco, popper(s). Electronics: TC4ESP (author), MS6514, USB/Artisan/Apps (contributor), PID controllers Grinders: Potu ghost burrs, Arco, Xeoleo ghost burrs, Krinder, vintage PeDe Dienes, MBK Feldgrind, Kinu M38 Brew/presso: ALM pour over, Arin lever, Staresso Mirage, Hario Cafeor dripper, Flair Signature, Kompresso, Aeropress, Gaggia Mini


BobbyS	#4 Posted on 05/31/2017 6:43 PM
1/4 Pounder Posts: 179 Joined: July 02, 2011	thanks!


BobbyS	#5 Posted on 06/10/2017 1:56 AM
1/4 Pounder Posts: 179 Joined: July 02, 2011	I'm just gonne keep these questions in this thread instead of making a new one. Question: for a 1k to 2k roaster, how big of a blower would I need. I have my eye on a round pan, 18 inch dia. for a cooling tray


dmccallum	#6 Posted on 07/03/2017 6:25 AM
1/4 Pounder Posts: 93 Joined: November 24, 2015	The San Franciscan SF-1 uses a 130CFM blower. I intend to use this one for my build - https://www.grain...plit-3FRG2 The SF-1 uses a single blower for both roast draw and cooling tray and switch via a gate/valve. You might get away with less, but assuming San Fran have it right.


BobbyS	#7 Posted on 07/04/2017 1:15 AM
1/4 Pounder Posts: 179 Joined: July 02, 2011	good to know dm, thanks! I have a 227cfm that I am going to use for the cooling tray. I think I will give it a shot to use it for both too.

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