I’ve been trying to develop a 5 minute dry end, 9 minute first crack profile to match one of the profiles I use on my Artisan 3e. For now I’m using 500g batches. I have followed some of the profiles on Roast.World and also looked at Royal Coffee’s profiles. However, despite dropping the charge temp from 250 C (482 F) to 220 C (428 F), I am still getting scorching. Two of those profiles are here:
https://roast.world/@toddjohnson.LLAn/roasts/mlo7UFlBzh8NfQO7rKtQn
https://roast.world/@toddjohnson.LLAn/roasts/BzZlaSb5PBRQt0LxurHuZ
The 220 C charge temp is based on Royal Coffee’s advice. The 250 C is based on Aillio’s. As I roast, I don’t see the scorching until later in the roast, but I suspect it is happening in the beginning.
Here is a photo from the first roast above with the 250 c charge temp:
And here is one from the second roast with the lower charge temp:
Two possible issues: First, my machine shipped with firmware 596 which is supposed to provide more power for 120v machines. Second, I am running the machine off of an EcoFlow DeltaPro which provides pure sine wave power, because our mains power is really flakey here in the Houston area, especially when it is so hot outside and the AC units are working overtime.
Any advice?