HomeRoast Digest


Topic: iRoast-2 Tech Support (8 msgs / 331 lines)
1) From: Mejia, Carlos
This is a multi-part message in MIME format.
I sent this message to Hearthware's customer service link on their
website and when it appeared that it wasn't sending (?), I sent it out
of my email to be sure they got it.  I haven't heard a peep out of them!
I'm wondering if anyone on the list with iRoast-2 machines can comment
on whether or not they've experienced this problem?
 
 
 
A question and comment on the iRoast-2
 
 
I recently was gifted with an iRoast-2 and am hooked on the wonderful
art/science of homeroasting.  I have a question (and comment) about this
machine.  I initially started using the #2 preset profile but soon
switched to some profiles that I programmed, mainly based on the
profiles that "Tom" has documented on sweetmarias.com (where my machine
came from).  I am keeping a log which includes the temp reading taken
every 30 seconds. I tried a new profile that i programmed a few days ago
that runs the first phase for 2 minutes, but noticed that the first
phase ran for 3 minutes.  I went back and reprogrammed it a second time
thinking perhaps i put in the wrong time.  Again, it is running for 3
minutes before I hear the audible switch to phase 2.  I'm wondering if
my unit is defective.  My comment is... I love the machine, but believe
it is a huge weakness that it doesn't offer the capability to check the
settings for a given program.  Perhaps this can be a feature on
iRoast-3?  Also, I would suggest that the digital 'font' be more natural
looking so that it's easier to read.
Can you tell me how to check my programming of my machine and let me
know what I should do if the unit is determined to be defective?
 
 
Carlos Mejia
 

2) From: Larry Williams
I haven't experiences that problem, but I have had two contacts with 
their customer service. The first to replace a part under warrante, and 
second to ask about roasting basics and programing, and in both 
instances I was very happy with their help and response. On the second 
call the first tech rep I talked to couldn't answer my questions so he 
arranged for a person to call who gave GREAT help.
Give them a chance.
Larry Williams
Mejia, Carlos wrote:
<Snip>
-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.412 / Virus Database: 268.18.1/690 - Release Date: 2/16/2007

3) From: Dave McCracken
I can't comment on the Hearthware tech support since I haven't tried to use 
it, but I can comment on your question.  This has come up several times on 
the list.
The Iroast-2 is pre-programmed to a set temperature for the first 3 minutes.  
They claim it's to "dry the beans" (I believe the temperature is 350, but am 
too lazy to check the archives :)  There appears to be another preset for the 
next 3 minutes, but I'm not sure what it is.  Your program gets full control 
after the 6 minutes is up.
Dave McCracken

4) From: Vicki Smith
 From other reports, it seems that although you can programme anything 
you want, the chipset in the roaster is set for 350F for the first three 
minutes. This does not necessarily mean that doing your own programming 
for that time is useless, as it does seem to affect fan speed in some 
mysterious (to me at least) way.
By my way of thinking, an IR2 is not defective if you can get a decent 
roast out of it without burning up the beans at 6 minutes, or failing to 
get to 1st by about the same amount of time. Tom wrote some about it, 
from his perspective:
"If the beans are moving through first and second crack, producing an 
even roast in about 9 to 12 minutes (see note on timing above) then you 
do not have a defective roaster, no matter what the temperature read out 
states. You ought to reach second crack by 8 minutes - for some roasters 
with some beans the time may be as short as 6 minutes, or as long as 8 
minutes. All of this is within normal parameters. The temperature read 
out ought to be consistently off, so you should be able to compensate 
for any differential."
vicki
Larry Williams wrote:
<Snip>

5) From: Tom & Maria - Sweet Maria's Coffee
You're right Dave - I think the 3 minute preset temperature is to 
prevent scorching coffee initially. It's the same with my big drum 
roaster (the Probat) ... dump coffee in at high heat and you will not 
only scorch it, but it will severely affect the target 
times/temperatures all along the roast curve. With air roasting we 
all know a 3 minute roast is possible (i.e. in a popper with small 
batch - ever tried the "non-recommended" air poppers where the heat 
comes straight out of the screen in the bottom - 3 minutes is a LONG 
roast for those!).
Carlos - looking over some things, some of my comments are outdated, 
or perhaps confusing because the majority of the information relates 
to early tests, which I then revised as the newer i-roasts came out. 
Maybe I should revamp the whole thing so it only refers to the 
current machine. Remember, hearthware actually changed the preset 
roast curves to match my custom curves I had set up for the i-Roast1 
(at least I vainly believe so :-)) .
Tom
<Snip>
--
                   "Great coffee comes from tiny roasters"
            Sweet Maria's Home Coffee Roasting  -  Tom & Maria
                      http://www.sweetmarias.com                Thompson Owen george_at_sweetmarias.com
     Sweet Maria's Coffee - 1115 21st Street, Oakland, CA 94607 - USA
             phone/fax: 888 876 5917 - tom_at_sweetmarias.com

6) From: Ross
This is a multi-part message in MIME format.
Hi Carlos,
I have had the IR2 for several months and have finally installed a temp =
probe in the bean mass: (I used the 8in large thermometer from Sweet =
Marias, the response time of the thermometer has some lag but it's not =
bad) As has been noted the IR2 seems to have a preset heat program for =
the first 3 minutes that overrides whatever you program in that time =
spot.  So far I have learned that voltage and outside air temp have a =
large effect on the IR2 roast curves/times.  Here is an example of the =
IR2 temp readings vs the bean mass probe readings for a recent roast =
using preset PGM 2 with outside air temp at 59F, I don't have the =
voltage reading (that's my next mod with a variac) here is the data:
Count down:   IR2 temp readout        Bean temp probe
Start 10:00        97                                100
    9:30             246                                160
    9:00            262                                225
    8:30            275                                275
    8:00            280                                315
    7:30            282                                325 Noticeable =
fan change
    7:00            288                                345  
    6:30            316                                370
    6:00            320                                380
    5:30            324                                400  First Crack =
started at about 5:45
    5:00            324                                405
    4:30            324                                410
    4:00            325                                420
    3:30            340                                425
    3:00            345                                440  
    2:30            347                                450
    2:00            347                                460 Second Crack =
underway
    1:30            347                                465
    1:00            350                                470
    0:30         Hit Cool button                   475 
This was my first run with the probe but from this data you can see that =
the IR2 temp readout is of limited use because it is not linear with the =
actual bean temps.  I recommend that you modify to get some type of =
roast chamber temp and try to keep the voltage and outside temp =
constant, that will save you a lot of confusion.  Other than that the =
IR2 is a great roaster, I find it easy to see and hear what's going on.
Good Luck,
Ross

7) From: Carole Zatz
On 2/16/07, Mejia, Carlos  wrote:
<Snip>
I've nothing but great experiences with Hearthware's Customer Service.
I suggest that you call them if you really need to get ahold of them.
Even if you have to leave a message they will get back to you.
That said, the first phase is predetermined and cannot be overridden
by the user.
Carole

8) From: Ross
Correction on this last post:  as you can see by the 10min time I used 
program 1 (450 for 10min) not program 2.
I ran the thermometer into the IR2 by drilling one hole in the chaff 
collector metal piece and one hole in the screen on the chaff collector lid. 
It works fine just takes a little lining up before putting the lid on and 
inserting the thermometer probe it binds just enough to hold itself solidly 
where it is positioned.
Regards,
Ross
Hi Carlos,
I have had the IR2 for several months and have finally installed a temp 
probe in the bean mass: (I used the 8in large thermometer from Sweet Marias, 
the response time of the thermometer has some lag but it's not bad) As has 
been noted the IR2 seems to have a preset heat program for the first 3 
minutes that overrides whatever you program in that time spot.  So far I 
have learned that voltage and outside air temp have a large effect on the 
IR2 roast curves/times.  Here is an example of the IR2 temp readings vs the 
bean mass probe readings for a recent roast using preset PGM 2 with outside 
air temp at 59F, I don't have the voltage reading (that's my next mod with a 
variac) here is the data:
Count down:   IR2 temp readout        Bean temp probe
Start 10:00        97                                100
    9:30             246                                160
    9:00            262                                225
    8:30            275                                275
    8:00            280                                315
    7:30            282                                325 Noticeable fan 
change
    7:00            288                                345
    6:30            316                                370
    6:00            320                                380
    5:30            324                                400  First Crack 
started at about 5:45
    5:00            324                                405
    4:30            324                                410
    4:00            325                                420
    3:30            340                                425
    3:00            345                                440
    2:30            347                                450
    2:00            347                                460 Second Crack 
underway
    1:30            347                                465
    1:00            350                                470
    0:30         Hit Cool button                   475
This was my first run with the probe but from this data you can see that the 
IR2 temp readout is of limited use because it is not linear with the actual 
bean temps. ........
Good Luck,
Ross


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