I’ve recently started work as the head barista at a newly opened coffee shop. When we first opened we didn’t experience many issues with the Mythos One, but recently we have started going through 4kg of coffee a day. My issue is that during the day the extraction times are constantly changing, sometimes quite drastically. In the morning I set it to 19.5 g in, 40 g out, 25 sec. During service, sometimes even after the first shot, this will creep down to 22 seconds, and later shoot up to 30 seconds. During service, I’m constantly battling the grinder and changing the setting slightly to ensure the extraction time I want.
I am constantly weighing the amount of ground coffee, this also does tend to fluctuate quite a bit.
I understand that that despite the heating element, the burrs and the fines can heat up during rush or cool down in between.
My question is whether it’s normal to constantly change the settings as I’m pulling the shots or whether there’s a better way to go about it. Perhaps there’s even an issue with the grinder.