Rallendk Senior Member Joined: 21 Oct 2012 Posts: 1 Location: Denmark Expertise: Just starting
Posted Sun Oct 21, 2012, 7:38am Subject: New with Gene - need a profile w/o external cooling
I expect to get my Cafe Gene within the week, and I almost can't wait!!
Compared to my previous iRoast2, it seems a lot harder to find general guidelines for using this machine. Seems like there's a lot of different suggestions, with different temperatures, with/without pre-heating and cooling either internally using the cooling cycle, or externally using something else.
What I'm looking for is an easy "starting" profile to use as a guideline. I would like to use the inbuilt cooling cycle, even though the beans might roast a bit further after hitting the stop button. I guess I just have to stop it a little bit before it is roasted enough when doing this..
Any suggestions about where to start? Would I need to pre-heat?
Posted Wed Oct 24, 2012, 6:38pm Subject: Re: New with Gene - need a profile w/o external cooling
I would preheat to about 320F, takes a couple of minutes, which gives you time to weigh out your beans, and puts some energy into the GC before the beans go in (at about 260F). It takes a long time ramp up the temperature, so you might as well get it started while doing something useful.
I roast half a lb at a time (227g), and dry at 320F for 7-8 minutes (the beans probably only get to about 300F in that time), then go to maximum temp until 1st crack, then turn down to the temperature that will give the final roast level (usually about 455F for FC+ for espresso), but start the cooling cycle about one stage early (stop at what looks like FC to get FC+, at C to get C+) when cooling in the machine. I generally go by bean appearance rather than cracks, as they are so hard to hear, and because it's easy to examine the beans as the GC rotates. The idea here is to get the beans dry and turning yellow before going to max temp to 1C, and then to draw out the roast to take about 4 minutes to get to the desired final point. This seems to work reasonably well across several blends and SOs, but I don't often do low grown island coffees or Sumatran or Monsoon types.
Dooglas Senior Member Joined: 12 Mar 2005 Posts: 690 Location: Portland, OR Expertise: I love coffee
Espresso: Expobar HX, La Pavoni lever Grinder: Ascaso, Baratza Drip: Bonavita, Bodum press Roaster: GeneCafe, Behmor
Posted Sat Oct 27, 2012, 5:02pm Subject: Re: New with Gene - need a profile w/o external cooling
I do not preheat and I allow cooling in the machine, though I do open the plastic hood and place a small fan to blow on the drum while cooling. I use 250 g of beans in the drum, typically roast at 465 for about 14 minutes, then reduce the temp to 255 for the remainder of the roast. Most coffees reach full city at about 15.5 to 16 minutes. First time with a new coffee, you can listen for the start of second crack and cut the roast there, but I tend to finish a little earlier than that with the GC.
Mercury3 Senior Member Joined: 1 Jul 2006 Posts: 45 Location: Colorado Expertise: I love coffee
Posted Wed Oct 31, 2012, 7:29am Subject: Re: New with Gene - need a profile w/o external cooling
I just got my Gene and roasted my first batch yesterday. Seemed to work well but got a little dark because I noticed it keeps on roasting a little bit into the cooling cycle. My next batch I'll keep this in mind and start the cooling cycle a bit sooner. Off hand I like it!
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