Hello all, I just recently purchased a couple of the World Selection Packs and have been roasting the Ikawa-provided profiles (by scanning the QR codes on the bags).
I’ve noticed that a common theme on several of the different origins is that the fan speed appears to be inadequate to really move the beans. This is most especially pronounced at the beginning of the roast (right after warm-up, when the profile actually begins). With the Brazil coffee for instance, even at four minutes into the (filter) roast when the beans were (unevenly) transitioning from yellow to tan the beans weren’t even moving, so much so that I had to physically shake/jostle the roaster. Likewise I roasted a batch of the Colombia today, and the beans stopped moving during the cool-down phase (I had to jostle the roaster again). Just to clarify, the fan is operating, but I’m unsure if it’s degraded or not.
Looking at the Brazil filter profile, the fan speed very quickly dives to 15% and stays there for much of the duration of the profile. During the roast itself (prior to investigating the profile) I was concerned that the fan in my unit was dying, as the output was much weaker than what I’ve come to expect from previous operation.
I’m assuming lack of movement, or sluggish movement during any phase of the roast is undesirable. Is it possible that a conversion issue happened with these profiles when the app transitioned to version 2.0? Or is it possible that the fan in my unit is defective?
Just for reference, I am running the latest version of the app from the Android app store, and although I believe my firmware is up-to-date, I ran the updater again after the Brazil incident above. Two roasts later, the Colombia beans stopped moving during cooldown.