Roasted a couple of fairly dark Sumatras today that have pretty linear RoRs. This has been a challenge for me for quite a while so I thought I’d share the profiles:
I’ve been having pretty good luck lately starting at P8 with 325g batches. Was originally worried that this much power with such a small batch might lead to scorching or tipping but haven’t seen any yet. To be on the safe side with this soft Sumatra bean, the first batch above started at P7 for a minute before going up to P8. I timed the fan increase to F3 in anticipation of an RoR jump at FC, which seemed to work pretty well. Dropped just before SC.
The second roast above was a back-to-back roast and a honey process bean, so I dropped the preheat to 190C and increased the initial P7 interval. The fan increase to F3 had a noticeable cooling effect on the RoR, but this bean loves to spike at FC so I added a short power dip. Again seemed to work pretty well, and dropped this one with a couple of snaps of SC in the pan.
I’m optimistic about these roasts, but… time will tell. Also eager to hear what others think.