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Discussions > Coffee > Home Roast > Ultimate roaster  
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sversimo
Senior Member


Joined: 20 Jan 2010
Posts: 16
Location: Norway
Expertise: I love coffee

Espresso: Izzo Vivi PID
Grinder: Rancilio Rocky
Posted Thu Jan 24, 2013, 10:15am
Subject: Ultimate roaster
 

I would love to get some help from you guys! I'm writing my master thesis on coffee roasting, more precise making the ultimate roaster for home use.
But what is the ultimate home-roaster!? What do YOU want it to have?

To make it as easy as I can for you to answer I have made a survey, with only a few questions.

http://www.surveymonkey.com/s/QQN7DMH

Please take a minute to answer a few questions. The results will be a part of my master thesis and design, and might one day end up in production!
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MerleApAmber
Senior Member


Joined: 12 Nov 2012
Posts: 203
Location: Atlanta
Expertise: I love coffee

Espresso: Breville BES900
Grinder: Baratza Preciso + Esatto
Vac Pot: Yuma
Drip: bah-humbug
Roaster: Hot Top 2K P
Posted Thu Jan 24, 2013, 10:40am
Subject: Re: Ultimate roaster
 

Remember to send citation for your paper!  By the by, how is your hand built roaster working for you? Will this paper focus more on the market, or toward definition of design considerations of home roasting equipment going forward?
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sversimo
Senior Member


Joined: 20 Jan 2010
Posts: 16
Location: Norway
Expertise: I love coffee

Espresso: Izzo Vivi PID
Grinder: Rancilio Rocky
Posted Fri Jan 25, 2013, 4:54am
Subject: Re: Ultimate roaster
 

MerleApAmber Said:

Remember to send citation for your paper!  By the by, how is your hand built roaster working for you? Will this paper focus more on the market, or toward definition of design considerations of home roasting equipment going forward?

Posted January 24, 2013 link

The main focus will be on improving the machine, but in order to understand what people would like I made this survey.
As of today, the machine works actually very good, but not good enough for perfection.
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oldgearhead
Senior Member
oldgearhead
Joined: 25 Jan 2010
Posts: 396
Location: Go Colts!
Expertise: I like coffee

Grinder: Virtuoso by Baratza
Drip: Chemex,Dilongi DCM900
Roaster: 1/2K Fluid-bed
Posted Fri Jan 25, 2013, 8:31am
Subject: Re: Ultimate roaster
 

I have already built the perfect roaster for our family. It is 1 one-pound, heat reclaiming, stainless steel and glass, fluid-bed, marvel that I use twice every week.
Click Here (www.homeroasters.org)

oldgearhead: DSC_9153.jpg
(Click for larger image)
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sversimo
Senior Member


Joined: 20 Jan 2010
Posts: 16
Location: Norway
Expertise: I love coffee

Espresso: Izzo Vivi PID
Grinder: Rancilio Rocky
Posted Fri Jan 25, 2013, 11:43am
Subject: Re: Ultimate roaster
 

Why do you prefer a fluidbedroaster? Looks good.


Here is a picture of my  prototype

sversimo: IMAGjfhjf0166.jpg
(Click for larger image)
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oldgearhead
Senior Member
oldgearhead
Joined: 25 Jan 2010
Posts: 396
Location: Go Colts!
Expertise: I like coffee

Grinder: Virtuoso by Baratza
Drip: Chemex,Dilongi DCM900
Roaster: 1/2K Fluid-bed
Posted Fri Jan 25, 2013, 12:29pm
Subject: Re: Ultimate roaster
 

Why do you prefer a fluidbedroaster? Looks good.


>snip<x]

1) Always roast light for drip.
2) Total cost was 512 USD.
3) Runs on 120 VAC.  
4) Built from 99.5% re-purposed parts.
5) Glass RC.
6) Only clean every 3 months.
7) Very simple chaff control.
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johnboddie
Senior Member


Joined: 28 Nov 2008
Posts: 213
Location: Virginia
Expertise: I love coffee

Espresso: MCAL, Brasilia Mini Classic,...
Grinder: Rossi RR45a,Rocky,...
Drip: Cuisinart (non-grinding)
Roaster: Behmor 1600
Posted Fri Jan 25, 2013, 1:28pm
Subject: Re: Ultimate roaster
 

If you are doing a Master's Thesis on the "Ultimate Home Roaster", I'd have to assume that the roaster:

A. Provides automated controls that create a reliable, repeatable roast for the beginner from some simple settings (such as darkness of roast) and allows more detailed control as the beginner gains experience.

B. Is affordable and easily self-maintained (including cleaning)

C. Includes safety features to protect against burns and fires.

D. Has effective chaff collection.

E. Incorporates an effective cooling mechanism.

F. Has a small footprint.

Most of the cost and complexity will be in the control system. The cost can be limited by providing software that will run on the user's own computer or tablet, providing graphic controls and roast tracking.

I would strongly recommend that you obtain a copy of Michael Sivetz's book, Coffee Technology, to guide your research.

JB
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sversimo
Senior Member


Joined: 20 Jan 2010
Posts: 16
Location: Norway
Expertise: I love coffee

Espresso: Izzo Vivi PID
Grinder: Rancilio Rocky
Posted Fri Jan 25, 2013, 3:35pm
Subject: Re: Ultimate roaster
 

Would you say that there is a significant difference in the development of flavors  between drum roasters and fluid beds?
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sversimo
Senior Member


Joined: 20 Jan 2010
Posts: 16
Location: Norway
Expertise: I love coffee

Espresso: Izzo Vivi PID
Grinder: Rancilio Rocky
Posted Fri Jan 25, 2013, 3:47pm
Subject: Re: Ultimate roaster
 

Thank you for the book tip, found it at my University library.

A: Consistency and quality of the roast will be of the major focuses in this thesis.

B: Affordable; depends on who you ask.
   Easy maintenance is crucial

C: Yes, needs to pass all official requirements

D: Of course, and easy to clean/empty

E: Effective cooling with vent pipe

F: energy efficient at least.

The control system is a tricky one!
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oldgearhead
Senior Member
oldgearhead
Joined: 25 Jan 2010
Posts: 396
Location: Go Colts!
Expertise: I like coffee

Grinder: Virtuoso by Baratza
Drip: Chemex,Dilongi DCM900
Roaster: 1/2K Fluid-bed
Posted Sat Jan 26, 2013, 7:21am
Subject: Re: Ultimate roaster
 

sversimo Said:

>snip<

The control system is a tricky one!

Posted January 25, 2013 link

IF I understand correctly:
1) A master roaster is first of all a 'cupper'.
2) He uses a drum roaster with a 'trier'.
3) He uses the 'trier' to check 'roast development by 'smell'
4) He then develops a profile using time and temperature to program his PLC (or whatever).

With my old roaster (modified Z&D) I had to roast by BMT because it was too loud to hear the 'cracks'.
I can easily hear the 'cracks' with my new (18 months old) roaster. I have three controls that effect time and temperature. I adjust each one manually with an eye on the BMT and a stopwatch, and an ear on the RC. I do not need or want a PC, PLC, or SBC to roast coffee. A 'smell-o-meter' might be nice though.

For roaster design the first question is; What is the desired batch size? Next question is; How much will it cost?

oldgearhead: DSC_0095.jpg
(Click for larger image)
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