[Homeroast] Boot Coffee
mckona at comcast.net
Wed Jul 29 11:37:29 CDT 2015
To be clear I never said anything about having this thing called roasting
coffee "Mastered"! While I've been roasting 15 or 16 years (and I'm still
only "half-baked" lol) and roasting on my USRC 3k going on 8 years around 60
Tons greens roasted on it so far I really just fake it pretty good :-). I'm
told my roasts are excellent, been voted "Best Coffee in Clark County"
multiple years running, yet by no means consider myself an expert even
though others may say I am.
Yes I control air flow 100% with variable fan speed. I had my 3k custom
build with double sized fan motor so I could always have the damper in bean
cooling position enabling roasting next batch while batch is cooling. (USRC
3k has only one fan while 5k and larger separate cooling fan) For
consistency I never move the damper and 1st batch of the day load the
cooling tray with old beans so start of roast air flow consistent 1st batch
versus later batches.
I wouldn't say you need to change your charge weight if that's the size
batches you need. Controlling a smaller batch is just different than a large
batch. Though yes easier to "over control" hence over compensate/shoot a
desired change with a small batch. But in fact good control on these
oversized large batches I do is actually harder than smaller batches.
A typical batch for me would be start of 1st 10:30 to 12 minutes depending
on bean etc., finish stage usually ~2:30 many 3 to 3:30 start of 1st to end
of roast total roast times 13:30 to 15:30. Light roasts extremely important
to have enough start of 1st to end of roast development time or risk thin
body, lack of sweetness and/or grassy. Of course not too much finish stretch
or risk flattening the acidity! Ah such a balancing act. And every bean is
different. And for every "rule" there's an exception to the rule!
Take good notes and remember there are no failures, just learning
Slave to the Bean miKe mcKoffee
URL to Rosto mods, FrankenFormer, some recipes etc:
Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
Sweet Maria's List - Searchable Archives http://themeyers.org/HomeRoast/
From: Homeroast [mailto:homeroast-bounces at lists.sweetmariascoffee.com] On
Behalf Of ricky carter
Sent: Wednesday, July 29, 2015 7:51 AM
To: A list to discuss home coffee roasting. There are rules for this list,
available at http://www.sweetmarias.com/maillistinfo.html
Subject: Re: [Homeroast] Boot Coffee
Thanks miKe, I'm assuming that with the PLC your air is on a fan? I have
just the flapper. Decent control, but not as precise as a fan would be.
I was changing air quite a bit for a while, but lately have been using
mostly flame for roast control. Air is still very tricky for me, applying
air seems to add BTU up to a certain point, then can act as a BTU reducer,
depending on flame.
I've not got this mastered yet and probably should go back to using air a
bit more in roast control. With just vane control it is hit and miss for
reproducability though. You have to look at the handle at exactly the same
viewing angle each time, LOL.
What time frame, generally speaking, are you running your Ramp?
I am trying to find that charge weight/charge temp combo sweet spot that
gives me a nice transition from dry to ramp but still gives enough punch to
the charge to keep the heat wave moving through the bean yet doesn't come
into ramp like a freight train.
It sounds like I need to up my charge weight quite a bit. Perhaps that will
smooth the transitions?
On Wed, Jul 29, 2015 at 9:56 AM, miKe mcKoffee <mckona at comcast.net> wrote:
> Ricky, sounds like your USRC 3k reads about like mine. Bean mass I
> estimate reads ~20f lower than real based on start of 1st and start of
> 2nd temp displayed readings. (FWIW very few roasts I do ever see 2nd)
> I can't really comment on the applied flame % because my standard
> batch sizes are to yield 6lb which depending on bean and roast is 6.9
> to 7.1 charge weight.
> Consequently my charge temp is substantially higher than yours
> anywhere from displayed 450-490f environment. Also because of large
> batch size virtually all roasts I'm starting with 100% flame on
> charge. I use both flame and air-flow to hit the brakes approaching
> 1st. FWIW I have PLC controller with touch screen both flame and air
> variable 0-100%. Some roasts/beans I'll actually keep flame 100% the
> entire roast and only vary air. Again this is because I'm running the
> USRC at its max batch (and then some) considering 3k=6.6lb and all my
> charge weights are higher! Really gotta anticipate needed ramp change
> with the (relatively) larger bean mass! On the rare occasion I do a
> smaller batch, even just a lb less charge, greatly changes the whole
> ball game. And a half size batch like you're running hugely different
> and of course much more responsive to applied heat and air changes.
> FWIW generally speaking ~5min is my target to hit bean mass ~300f
> (real, 280f displayed).
> Slave to the Bean miKe mcKoffee
> URL to Rosto mods, FrankenFormer, some recipes etc:
> Ultimately the quest for Koffee Nirvana is a solitary path. To know I
> must first not know. And in knowing know I know not. Each Personal
> enlightenment found exploring the many divergent foot steps of Those
> who have gone before.
> Sweet Maria's List - Searchable Archives
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