HomeRoast Digest


Topic: Quest first roast (10 msgs / 250 lines)
1) From: Barry Luterman
Received my M3 Friday. I tried my first roast with it yesterday. I roasted
in my garage The ambient temperature was about 50 degrees. I pre-heated the
Quest  to 200 C  with the air volume on 4 1/2. When the machine was
preheated I introduced 8 oz (233 gr) of my C list coffee. The heat setting
was right in the middle. Unfortunately, I did not have a watch with me. The
roast went on and on. The trier worked fine the bean samples looked good but
I never smelled impending first crack nor heard it. Suddenly it dawned on me
that the heat was not high enough on the machine to overcome the ambient
temperature. As a result of the reduced ambient heat my beans were baking
rather than roasting. This is a problem I have never encountered in my years
of roasting in Hawaii. I immediately increased the heat and as a result my
beans turned ebony shiney black with an oil sheen you could see your face
in. There I was with a half pound of baked beans on the inside and burnt on
the outside. However,at least , my drum was seasoned.
Second roast; pre heated drum, introduced 233 gr of beans. noticed heat
dropped 100 degrees. Cut back heat but not as far as the first roast and
timed the roast at nine minutes first crack. The crack was amazingly loud.
The sound of the crack reverberates in the bean chute and sounds like rifle
shots. Cut back the heat and increased the air flow. The roast continued
through first crack and immediately entered second crack. Dumped the beans.
Turned off the heat increased the air flow to maximum and placed the roasted
beans in the cooling portion..
I was impressed with the cooling speed of the machine, the uniformity of the
color of the roast and the sound of the cracks.
After I cleaned the Quest an easy task. I went to Target and bought my first
upgrade for the Quest. I purchased a Quartz space heater for the garage.
More to follow.
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2) From: Brian Kamnetz
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3) From: Robert Bedwell
Brian....thanks for posting your first roast experience.
I have had mine for over a week but not roasted with it yet.  Today was the first day in several weeks that the temperature has climbed above 40F.
I have installed the EricS thermocouple kit for reading both BT and ET.  I have also installed an insulation blanket which may help roast in cooler weather.  
I have made a few dry runs on my desk and hopefully I will be better able to control the roast with beans.  
Nine minutes to FC is ideal in my opinion.  How long from the start of FC and the start of SC please?  What I am a bit jiggy about is the best way to cool the roaster down before going into 
FC and maintaining a slow rate of rise temperature from FC to SC.  
Did you have a separate AC line to plug in your quartz heater?  If not I would be curious the affect it has on the power to the Quest.
Bob
On Jan 16, 2011, at 4:28 PM, Brian Kamnetz wrote:
<Snip>
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4) From: Steve Sakoman
On Sun, Jan 16, 2011 at 12:47 PM, Barry Luterman  wrot=
e:
<Snip>
he
<Snip>
he
<Snip>
but
<Snip>
 me
<Snip>
ars
<Snip>
on
<Snip>
Hi Barry!
I regularly roast 8 oz. with ambient temps in the 50's
I think your issue was that 7.5 amps (the center of the dial) isn't
high enough for 8 oz. of beans.
I'm looking at the data from my last roast, where the ambient was
about 52F.  Here's what I did:
Heat at 8.5 amps, fan at 4 to preheat (and for first phase of roast)
Add beans when BT reads 200C, BT rapidly drops to just below 100C then
begins to rise
When BT hits 195C reduce amps to 7.5, increase fan to 5 (about 7:45
after beans added)
Initial snaps of first crack at 8:56
Increase fan to 10 at 13:30 (to blow out remaining chaff)
Dump beans at 14:09, at point where there are 1 or 2 snaps of second
Don't give up, the Quest has plenty of power to roast at low ambient!
Steve
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5) From: ricky carter
I'll second that Barry, I just finished a roasting session in an unheated
garage where the ambient temp was 10 F.
And I'm well away from pushing this thing hard. I use approx 8.5 amp setting
(950 watts) and hit 1st @ 9 minutes with 1/2 lb load.
On Sun, Jan 16, 2011 at 10:53 PM, Steve Sakoman  wrote:
<Snip>
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6) From: ricky carter
I'll second that Barry, I just finished a roasting session in an unheated
garage where the ambient temp was 10 F.
And I'm well away from pushing this thing hard. I use approx 8.5 amp setting
(950 watts) and hit 1st @ 9 minutes with 1/2 lb load.
On Sun, Jan 16, 2011 at 10:53 PM, Steve Sakoman  wrote:
<Snip>
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7) From: Barry Luterman
Steve I just used your profile and it was almost spot on for my roaster and
garage. The roast looks beautiful.Thank You I now have a starting point.
Thanks so much Barry
On Sun, Jan 16, 2011 at 7:53 PM, Steve Sakoman  wrote:
<Snip>
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8) From: Steve Sakoman
On Mon, Jan 17, 2011 at 10:25 AM, Barry Luterman  wrote:
<Snip>
I'm glad it worked for you!
I've found this is a good starting point for a new bean.  After a
roast or two at this profile you'll know whether you need to tweak it
to suit a particular bean, but this profile seems to be average for
the bean type I buy.
The Quest is pretty repeatable in my experience, so it makes it much
easier to stop the roast "just before second" because you pretty much
know when that is going to happen :-)
Steve
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9) From: Barry Luterman
Exactly it is also interesting that profiles seem to be reliable across
machines. Other home roasters seem to vary wildly from roaster to roaster.
It will really make it easier for Quest owners to share profiles
On Mon, Jan 17, 2011 at 10:37 AM, Steve Sakoman  wrote:
<Snip>
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10) From: g paris p
Bob:
great post I am a bit jealous since my QM3 arrived over a month ago I have
not been able to use it; first the broken wrist and cast and now not being
home.
With permission from all of you who have posted here about the QM3 I would
like to take a lot of the thoughts and repost them tohttp://www.homeroasters.org/php/news.php if no one minds, all credit given
to SM for initial posts!
thanks,
ginny
On Sun, Jan 16, 2011 at 2:46 PM, Robert Bedwell  wrote:
<Snip>
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