Posted by fauzi on 05/08/2012 04:04
First post... A Hello to all of you from Karachi, Pakistan!
Been using my Genecafe for about a year now, and have had mixed results. Been trying to read up on it, but recently have been getting nothing but bad results. Will try to explain what's going on, so I may get a bit long-winded... But need to put it all out there! :)
Quick, sour extractions on my Rancilio Silvia, groudn finely on my Rocky.
I had been faulting my grinder and machine, but recently realized that i was able to get perfect extractions from store-bought stale coffee... Started focusing on my roaster and realized that I am not getting to the temperatures that I'm using as nodes in my profiles. I deal in deg celsius here so will convert for the forum below:
Preheat on full power for 5 min and quick dump beans
302 F for 5 min (Drying)
446 F for 4 min
464 F for 1.5 min
482 F until 10 seconds AFTER FC
455 F until desired roast level
1-1.5 minute manual cool cycle (colander on fan) to room temp.
Usually, I get to say 446 in the 2nd node by towards the end of 9 min. Recently, I have not been able to get there at all.... In fact, my temp reading at 9:11 says 411.8.
I'm no expert, but the beans don't seem like they're expanding as much as they should either.
At the end of 48 hrs of resting, I'm getting 12-15 second blonding espresso shots...
Do the symptoms sound like I'm baking the bean?
Appreciate the help!