torjusd Senior Member Joined: 11 Nov 2003 Posts: 1 Location: Trondheim, Norway Expertise: I love coffee
Grinder: Bosch Vac Pot: Bodum Santos Drip: King of Coffee Roaster: Imex CR-100
Posted Tue Nov 11, 2003, 4:55pm Subject: IMEX CR-100
I live in Norway, and recently ordered an Imex CR-100 home roaster from a webshop in the UK (www.hasbean.co.uk). I put the specified amount of green beans in, and set the thing for 8 minutes, which the manual said would give me a light/medium roast. Problem was, after 8 minutes, the beans were barely light brown! Even after 25 minutes, there was no oil on the beans. Anyone have any idea of what the problem could be? I'm suspecting the chaff collector, or possibly the heater element.
jim_schulman Senior Member Joined: 19 Dec 2001 Posts: 3,772 Location: Chicago Expertise: I live coffee
Posted Tue Nov 11, 2003, 8:56pm Subject: Re: IMEX CR-100
This unit is sold as the Cafe Rosto in the US. The roasters have excellent reliability, but are extremely variable on roast times, since the recirculating design amplifies even small variations in fan and heater capacity.
The site is short and sweet, but also has very high quality information on espresso making. Ronald Lever is an alt.coffee regular and a great supporter of all us coffee nuts; so he'll answer any questions you mail or post.
Posted Tue Nov 11, 2003, 8:57pm Subject: Re: IMEX CR-100
The Imex CR-100 is also known as the Caffe Rosto in many other regions of the world. Try a Google search using the terms 'Caffe Rosto cold' or 'caffe rosto broken' or 'caffe rosto fuse'. Or you can look on this site in the roasting talk forums, and look for the post entitled 'fuse replacement for caffe rosto' that I wrote.
Owning two Caffe Rostos myself, I am going to guess that as the unit is running, the air coming out of the exhaust port is lukewarm at best. If the machine is working properly, you should be able to hold your hand in front of the exhaust port for only a second or two to prevent burning.
If the air coming out is lukewarm, the most likely explanation is that the thermal fuse, also known as a thermal cutout, is blown. This happens when the machine reaches a certain temperature. When that temperature is exceeded, the thermal fuse opens the circuit to prevent fire. Once that happens, the fuse must be replaced or bypassed. Without doing so, the machine will never reach roasting temperature. My post on the fuse replacement identifies the part, and provides some links to other websites showing how to replace or bypass the fuse.
Bearing in mind that you just purchased the unit, and I assume this was one of the first times you used it, I would return it to the shop from where it was purchased for a replacement under warranty.
Please let us know if you have any furthe questions.
Georg Senior Member Joined: 22 Apr 2002 Posts: 7 Location: Rosenheim, Germany Expertise: I love coffee
Espresso: Isomac Zaffiro Grinder: Mazzer Mini, Zassenhaus Vac Pot: Jenaer Glass Gaskettless,... Drip: Press Pot or hand pour Roaster: HG/DB setup
Posted Wed Nov 12, 2003, 9:45am Subject: Re: IMEX CR-100
I have the same roaster (also 220V) and find it picky to use. Amount of beans, ambient temp and voltage play a big role. I had quite a few stalled roasts with flat tasting coffee.
The site Jim suggests is good and helpful. Alas I donīt like the suggested mod. I would guess the cooling will be affected by it as well. So what I do, if I feel a roast is not proceeding well, is to cover the outlet with the metal measuring cup by hand. I also take care that I roast in a warm environement (aka inside). Roasting in the bathroom was not a good idea though. Despite the fan the smoke kept a long time and the towels got a smell.
Suggested setup is to use a movable shutter which can be adjusted from the outside. Using a thermometer would allow for mechanical control of the roast profile. If I ever have some time left ...
I had a few roasts now from the CR 100 which where very good. Made a perfect espresso using a Brazil/Honduras Mix suggested by the guys from Sweet Marias
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