Au Comptoir Nantais
Hello,
I'm Nicolas from France. I try to roast whased Peru on my Roest and with all the profiles of the Library or with my own profiles, the result is not good. The coffee is always underdeveloped with tastes of cereal.
Can someone help me ?
Many thanksRoest 260 .jpeg
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Au Comptoir Nantais
Yes, 93° on the kettle.
I'll try at 94° and then with a finer ground to compare.
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Thomas
Another suggestion,
looking at your logs you maybe want to wait during first crack until ET reaches a flat plateau,then drop it.
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Chris Lee-Gaston
HI Chris Lee,

One again, many thanks for your feedback. 
You're right with the ROR, I try to copy the curves from Scott Rao's books about Gas-Drum Roasters.
But most of all, the cupping is the judge ! 
And when I cup the curves with very low ROR at the crack, it is underdeveloped.

Regards,
Nicolas


Yeah, I am definitely a big Fan of Rao's work but I suspect that the optimal Roast on the the ROEST is not going to be as directly determined by the ROR as Rao's research (note that RAO also specifically mentions differences to btROR and etROR - the ROR we get from the ROEST is, to my limited knowledge acting more closely to an etROR - correct me if I'm wrong here, people), purely because the roast on a ROEST is not being singularly or even primarily driven by the drum as an ambient heat source.

Metaphorically think of the ROR in RAOs book and the ROR on the ROEST something like comparing the speed of a Car with the Speed of a boat. Both objects' have measurement devices that are showing you a measurement of speed/velocity, which in both cases are the same thing, but Kilometres/Miles per hour is not exactly the same thing as Knots. The mistake that is often made is the assumption that because in both cases we are talking about measure the same thing, that the number we are shown is in the same kind of Unit. does that make sense? readings vary from roaster to roaster way more than you'd think and we aren't even talking about the same technology here, because the ROEST is not a strictly traditional drum roaster (and even with the drum roasters there are heaps of subtle variations...)
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Chris Lee-Gaston
...to make it a bit simpler, for one of my profiles I like to get end temperature 204 at 15 minutes. To achieve  the same result on a different device, I regularly need to reach temperatures of '210 or 213c' because the sensor on that device read waaaay differently to my other machine. I don't even know which one is strictly more accurate (I assume the first, based on testing) but the point is, you can imagine that the second one has a way different set of curves than the first, even when I eventually am able to get the same result on both machines...
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