HomeRoast Digest


Topic: Temperature Help with Gaggia Carezza (9 msgs / 256 lines)
1) From: Eddie Dove
Is there some way to adjust the water temp on the Gaggia Carezza?
The brew temp is usually too low (below 195F), so I end up turning on
the steam switch, then running the water through the group head until
it reaches the temperature I want, then pull the shot.  Not a big
deal, I just wondered if I could adjust something inside.
Appreciate any help.
Have a great weekend!
Eddie
-- 
Vita non est vivere sed valere vita est
Roasting Blog and Profiles for the Gene Cafehttp://southcoastcoffeeroaster.blogspot.com/

2) From: miKe mcKoffee
Fixed deadband brew boiler tstat, not adjustable. Do you know where in =
the
brew heater deadband cycle you're pulling? Starting the shot just before
boiler heater would go off during deadband cycle will keep it on during =
shot
and yield a higher temp. Just gotta learn your Gaggia surf! Could also =
try
replacing the tstat, maybe it's bad though less likely the problem, or =
PID
boiler control would do it.
Pacific Northwest Gathering VIhttp://home.comcast.net/~mckona/PNWGVI.htmKona Konnaisseur miKe mcKoffee
www.mcKonaKoffee.com
URL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/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 Archiveshttp://themeyers.org/HomeRoast/
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on
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3) From: stereoplegic
already answered this on homeroasters.org, but for the list, here goes:
Eddie:
i had the same problem (brew t-stat set too low, even though it says 
107C w/ 10 degree tolerance), so i went w/ a PID (held off for a little 
while, but got tired of trying to figure out if the ready light was 
being honest). i got one from Auber Instruments (you see them all the 
time on ebay, and Suyi is great on communicating setup parameters), the 
cheapest model (i actually have two from Auber, but the cheaper, smaller 
model is easier to auto tune and has parameters closer within the range 
you need for espresso). if you order the PT100 RTD to use in place of a 
thermocouple, you can actually adjust by .1 degree, and uses the same 
size bolt as Gaggia/Silvia thermostats. i got my SSR from ColdFusionX 
(also on eBay). i can pull walk-up shots all day now, and the only time 
i have to temp surf is when pulling back-to-back shots. this mod is very 
easy and i'd be happy to walk you through it should you opt to go this 
route.
miKe mcKoffee wrote:
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4) From: Brian Kamnetz
Stereoplegic,
Do you think the mod you describe below for the Gaggia Carezza would
also work for the Gaggia Espresso model espresso machine?
Thanks,
brian
On 9/18/07, stereoplegic  wrote:
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5) From: stereoplegic
yes, definitely. same guts. an added advantage w/ the Espresso is that 
it has more flat sides, making it easier to mount the PID's case to the 
Espresso (Carreza is mostly round, so i have the PID attached via a 
"tail" (flexible gooseneck from a lamp, inspired by some Silvia PID mods 
i've seen).
here's a link to the site i followed when doing my mod:http://www.thedomesticbarista.com/content/view/17/however, i decided to go w/ the PT100 RTD instead of the thermocouple as 
i mentioned before.
more $, but less work, and 1/10th degree F or C readings and adjustments.
also, the SSR from ColdFusionX has a built in heatsink, so that's not 
required. if the inside of your Espresso is as cramped as his Coffee, 
i'd recommend putting the SSR in the box w/ the PID (would require a 
bigger box than Auber offers, i believe), not inside the Espresso. that 
way, you have fewer wires going out to the PID case (PID and SSR can 
share the same AC+ wire, DC control wires from PID to SSR are contained 
within the PID case, so only the 1 AC+ wire, 2 AC- wires (1 from PID, 1 
from SSR to heating elements) and the thermocouple/RTD wire would be all 
that are going from the Espresso's case to the PID box). it looks like 
this guy's SSR is on top of his boiler, which worries me.
Brian Kamnetz wrote:
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6) From: Rob Piirainen
Cool, so you can PID a Gaggia Espresso!! that might be getting into my =
price range maybe. Lets see $200 for the Gaggia Espresso, anyone got a =
ROM for the PID hardware ? I'll be useing it stricktly for espresso =
shots, I'm over lattes, etc.

7) From: Brian Kamnetz
Great to know that this mod is possible for the Gaggia Espresso. I
will save this info. It will be a while before i get to this (if
ever), but again, good to know that it's an option.
Brian
On 9/18/07, stereoplegic  wrote:
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8) From: Eddie Dove
"Fixed deadband brew boiler tstat, not adjustable."
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"Do you know where in the brew heater deadband cycle you're pulling?"
Is that indicated by the dialogical frickitism or the lack of movement
at the fixed-swivel end of the johnson rod?
"Starting the shot just before boiler heater would go off during
deadband cycle will keep it on during shot and yield a higher temp."
It's like your trying to speak to me, I just know it!
;-)
Since the family will be out of town and I will have the place to
myself this weekend, I have 2 pounds of roasted Liquid Amber waiting
for me to practice with my new Thor Ridgeline Tamper this weekend.
Maybe I will get good enough, maybe I will need to install the PID
stuff, maybe there won't be anything left in which to install the PID
...
The Technivorm however has been delivering fantastic coffee for the
office this week:
Sumatra Mandheling Blue Batak
Timor FTO Maubesse
Kenya AA Nyeri - Karatina
Tanzania NgoroNgoro Convent
Eddie
-- 
Vita non est vivere sed valere vita est
Roasting Blog and Profiles for the Gene Cafehttp://southcoastcoffeeroaster.blogspot.com/

9) From: Eddie Dove
Stereo,
Thank you for the excellent info ...
You forgot to give us your phone number ...
Eddie
-- 
Vita non est vivere sed valere vita est
Roasting Blog and Profiles for the Gene Cafehttp://southcoastcoffeeroaster.blogspot.com/On 9/18/07, stereoplegic  wrote:
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