I had an interesting roast today. I modified my oven to try and increase the time from first crack to second crack, which i thought was dragging on a bit too much before. The result is shown in the plot below.
All was going nicely with the mexican organic from beanbay. When the beans were added to the oven, the temp only dropped to 90 degrees, as I didnt quite mount the thermocouple low enough (it was just covered at the beginning, but well covered later). It hit first crack at 9.8m, or 190 degrees, and rolling first crack at 13m, or 213 degrees. These temps were similar to my other roasts of this bean. But this time, when I got to rolling first crack the temp went crazy. It shot right up, and even with some additional venting added when i saw it going up too much, it just kept going. rolling first crack seemed to drag on and on - and eventually it clicked that I must have moved into rolling second crack also, as the beans were about CS10/11.So i dumped them. Does this sound right that I could have moved straight from rolling first to second crack?
Im thinking that I will need to approach rolling first crack slower in future to stop this happening? Or does this more relate to the size of the the batch being roasted (by the way, was 550gms)?

All was going nicely with the mexican organic from beanbay. When the beans were added to the oven, the temp only dropped to 90 degrees, as I didnt quite mount the thermocouple low enough (it was just covered at the beginning, but well covered later). It hit first crack at 9.8m, or 190 degrees, and rolling first crack at 13m, or 213 degrees. These temps were similar to my other roasts of this bean. But this time, when I got to rolling first crack the temp went crazy. It shot right up, and even with some additional venting added when i saw it going up too much, it just kept going. rolling first crack seemed to drag on and on - and eventually it clicked that I must have moved into rolling second crack also, as the beans were about CS10/11.So i dumped them. Does this sound right that I could have moved straight from rolling first to second crack?
Im thinking that I will need to approach rolling first crack slower in future to stop this happening? Or does this more relate to the size of the the batch being roasted (by the way, was 550gms)?




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