tuning temp profiles on stock (0.8mm) gb5

la marzocco, synesso, simonelli, cimbali etc

Postby barry on Sat May 19, 2007 1:56 pm

Andy Schecter wrote:I'm not saying the over and underextracted terms are useless, I'm just saying that they don't seem to address a lot of common espresso faults. Maybe I'm just too dense to understand.



not only that, but they and their results in the cup are often misunderstood. it doesn't help at all that it is possible to have a cup that is both under- and overextracted.
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Re: tuning temp profiles on stock (0.8mm) gb5

Postby Jimmy Oneschuk on Mon Feb 28, 2011 12:45 am

Just an update: spoke with LM USA and the hypothesis is indeed something faulty in the mix valve.

I'm hoping to speak over the phone and try to make some adjustments to the mix valve body... apparently, it can be adjusted.

Ideas?
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Re: tuning temp profiles on stock (0.8mm) gb5

Postby geir oglend on Mon Feb 28, 2011 5:30 pm

Jimmy, make sure the water to the machine is off and it has cooled down completely. Mark the spot were it is for reference.
Careful there is a hard to replace o-ring in the middle of the adjustment screw which will leak profusely if it doesn't reseat properly!
Call me if you need, geir
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Re: tuning temp profiles on stock (0.8mm) gb5

Postby Jimmy Oneschuk on Tue Mar 08, 2011 6:23 pm

I'm going to be getting a tech from LMUSA to walk through the adjustment with me over the phone. I've taken apart the valve to descale the valve bodies before but didn't adjust anything per say. This was all figured out while talking with LM at the Seattle Coffee Fest :)
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