HomeRoast Digest

Topic: Graduation Day (15 msgs / 375 lines)
1) From: Thomas Pfau
Dan Martin wrote:
I wrote to the list last week about my sister giving me a turbo oven 
that she had bought, used once and packed away.  I just bought the Stir 
Crazy to go with it this morning.
The oven my sister gave me (AromaRoast - anyone heard of it?) is about 
12" in diameter.  I borrowed a ruler from the office supplies section of 
Target so I could measure the top of the SC.  It was only 11.5".  Home 
Depot was right next door to the Target so I picked up a strip of 
aluminum 1/8" x 1.5" x 4'.  I also picked up a copper end cap and some 
short bolts and nuts.  When I got home, I used the aluminum and bolts to 
build a spacer like the one on this page - http://turbocrazy.atspace.com/index_files/project.htm. Great idea, 
Woz!  You should patent it.
After performing the necessary mods, I brought it all outside to try a 
roast of 250gm of Puro Scuro.  A couple of minutes after getting started 
the circuit breaker tripped.  I opened the SC, disconnected a wire from 
the heater, wrapped the end in electrical tape, then closed it back up 
and continued the roast.  18 minutes later I was at second crack.
I tried my Nicaragua Pacamara Peaberry for the second batch.  I have had 
no luck roasting this coffee in my Hearthware Precision or my modified 
Popcorn Pumper.  The Precision can't keep the beans moving because 
they're too heavy.  The Pumper roasts too fast and even when controlling 
the temperature with a thermometer and a switch on the heater it 
finishes too fast.  In the SC/TO I hit second crack in about 17 minutes 
and it's a very even roast with no divits.
I ran a third batch of Costa Rica SHB WP Decaf.  Thats 750gm in three 
roasts taking just over an hour (not counting time for tweaks of the 
setup between roasts).  The most I had ever roasted in one day with the 
other roasters was about 570gm in six batches taking nearly two hours.  
I guess I need to buy some larger mason jars because these 8oz jars 
aren't going to cut it anymore.
Although I only did 250gm per batch, it looked like it could easily 
handle more without any mods to the stirring arm.
Can't wait for it all to rest so I can taste some....
pfau --http://nbpfaus.net/~pfau/

2) From: James House
Let us know how those roasts turn out!  I have found that 10 oz. is the
sweet spot for roasting volume.  I have roasted a pound, but I find that the
wall climbers require some stirring and some of the beans will work up into
the woz ejector.  But occassionally I do a single pound roast (just did one
this morning) and it will handle it fine.  I have not done anything smaller
than 8 oz either.
The AromaRoast should work out fine, considering how hot these ovens get
from what the dial says I think you will be hard pressed to find an oven
that *won't* work.
Good luck and happy roasting!
On 6/3/06, Thomas Pfau  wrote:

3) From: Demian Ebert
Welcome to the wonderful world of SCTOs. Sounds like you managed three
pretty good roasts.
I just finished two 300 gm batches. Moka kadir at a nice FC++ in 13:30 was
the first, the second batch was Sumatra Tim Tim blangili longberry taken to
FC+ in just over 12:30. All told it took me about 40 minutes including set
I have noticed that my coffee consumption has gone up with my ability to do
larger batches. I was using an I-roast and had to roast almost every night
to keep up with our use. Now I do three or so batches on the weekend and I'm

4) From: Don Cummings
I'm curious. Before I bought the Springform pan to use as a spacer I looked
for the aluminum strip that everyone seemed to be finding without a problem.
I had a nice gent walk from one end of Lowes to the other with me trying to
find it and we were unsuccessful.
In which department did you find it?
On 6/3/06, Thomas Pfau  wrote:

5) From: Peter Zulkowski
I think you could use an aluminum yard stick.. or two.
Was supposed to be 118F today, but only made it to 112F.. here in LHC
Don Cummings wrote:

6) From: Demian Ebert
I'm using an alluminum yardstick I got at an Ace hardware. It's just barely
long enough and doesn't have the overlap that others use to create a chaff
ejector. But I solved that problem with my dremel and a bit of scrap
aluminum. I cut a notch in the yardstick, bent the flap into the SC so it'd
divert a portion of the airflow. Then I cut and screwed on an extender to
make the flap a bit longer. Ejects the chaff like a champ now.
On 6/3/06, Don Cummings  wrote:

7) From: Don Cummings
Yeah, I actually did find yardsticks but I like the Springform a little
better because of the rounded edges. With the gasket I get an excellent seal
on both top and bottom.  I even found a 48" yardstick (fourfootstick?) but
it had cork glued to the back and I would have needed to buy a tool to cut
6" off.
At this point it is more a matter of academic interest.  I swear I spent
more time looking for that little aluminum strip then it took me to do all
of the other mods combined.
On 6/3/06, Demian Ebert  wrote:

8) From: Tom Bellhouse
Thomas, if the 18 minutes is too long, you can boost the heat while
roasting by blocking the chaff ejection chute (or slot, or whatever mod
you have.)   The rig is plenty leaky enough that it won't "stifle" the
TO blower.  You could also put a switch on the SC heater, which is my
plan for the next one I build.
Since the top of the spacer ring is smaller than the TO top, the top
will want to slide around or fall off.  I pop-riveted three simple
aluminum "fingers" spaced evenly around the ring and pointed up and out.
The TO rests securely within them.
Happy roasting!
Tom in GA

9) From: Tom Bellhouse
This is a multi-part message in MIME format.
There's a bin of metal stock at my Lowe's -- rods, steel and aluminum =
flat stock, standing on end.  It's there, I promise!
Tom in GA

10) From: Peter Zulkowski
Looking for parts to make or improve roasters or roasting is a wonderful 
pass time :)
Welcome to the addiction....
...wait until you hit the brewing phase ....
then the espresso phase...
then the grinding  phase...
Don Cummings wrote:

11) From: Thomas Pfau
Don Cummings wrote:
I was in Home Depot.  It was around the hardware aisle.  I was so 
shocked that I found exactly what I was looking for that I can't even 
remember what else was around.
I had been expecting to look for it in Lowes.  They have some sheet 
metal in the aisle with screening supplies.  I don't recall if they had 
anything like this, though.
pfau --http://nbpfaus.net/~pfau/

12) From: James House
Yup, what Tom said.  There is a miscellaneous metal section at Lowes, and it
is very easy to miss.  IIRC, it was about the center of the building, in the
center of an aisle.  It is not over near all the metal stuff as you get
close to the lumber section.  I remember walking all over Lowes myself, even
asked a couple people that worked there, they said they did not carry it.  I
happened to stumble onto it myself.  They are there.  I used a dremel to cut
mine down a bit, as it was 4 feet long.
I highly recommend that you do your best to get the spacing and everything
down before you drill the holes.  I didnt space properly and when I drilled
the holes and ran the bolts through, the diameter was too large.  I had to
drill another set of holes.
On 6/3/06, Don Cummings  wrote:

13) From: Thomas Pfau
Tom Bellhouse wrote:
16-18 minutes was my target time.  I ran it at 350 for about 5-6 
minutes, up to 450 about 6-7 minutes, then 500 until first crack when I 
turned it back down to 450-475.
I might add a chute to direct the chaff into a catcher - maybe one of 
those wire mesh pencil holders.  I'll see about rigging a door into the 
chute, maybe.
It slides around a little but I don't think it will fall off.  Sounds 
like a good idea, though, if it does show signs of coming off.
pfau --http://nbpfaus.net/~pfau/

14) From: James House
Don Cummings used some kind of heat insulation gel or something along those
On 6/3/06, Thomas Pfau  wrote:

15) From: Don Cummings
Yep, the high temp gasket worked great to stop the TO from sliding around.
I actually did find a bin of scrap metal. It was the first place the guy
took me to. There was nothing of use in it at all.  Mostly it was angle
steel and thick and tall.
On 6/3/06, James House  wrote:

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