I’ve roasted over 1,000 batches on my R1v2 over the past 10 years (!) and it’s been fantastic and very consistent (sometimes shockingly so).
To make periodic maintenance more streamlined, I just upgraded to an R2 (not Pro) and it seems like my normal 755g recipe of preheating to 295°C and power level 7 needs to be tweaked because the roast times are a good 20% longer on the R2 at the same settings. I just tried a roast starting with power level 8, and it was a bit better, but still lagging (on the same beans) the R1v2.
Maybe someone from Aillio could comment on the differences between power and other settings between the two models.
For example, I think P7 on the R1 might be more watts than P7 on the R2, but less than P8 on the R2. Which makes me think that if you’re still lagging at P8, then it’s down to something else.
Another possibility might be the preheat- any two machines (or two temperature probes) could vary. Or the preheat times on the two machines could be (and probably is) different.
Well, you obviously have a lot of experience roasting on your R1-- more than I have on my R2, but so far I find that starting BT is a fairly reliable reference point for the preheat state of the roaster.
Just thinking aloud here…if you have the option to benchmark the same beans across the two roasters, then you could probably calibrate their relative temperatures using the physical changes in the bean. That might be give you some useful info about their differences, at least in terms of temp measurements.
if you have the option to benchmark the same beans across the two roasters…
That’s what I’m reporting - I have one bag of beans that I roasted on the R1 and now R2 and am seeing 20% longer roast times to get to the same temp, even with the R2 at PL8. The thing I haven’t tried yet is letting the R2 warm up for the same amount of time, even though the IBTS reports the drum has reached 295 - there could be other parts of the roaster that also need to warm up.
I am experiencing this difference while roasting 755g at a time - I think the conditioning roasts, which were recommended to be 350g did go as fast, if not faster on the R2.
Yeah, I guess what I was asking, to clarify was actually: are the temperatures on IBTS and BT the same between the models for the physical transitions? Esp BT might indicate the the R2 preheat needs to be higher than the R1 preheat to get similar results (in addition to the control settings.) If the same preheat temp on R2 is actually storing less thermal energy, that might be part of the difference.