Giesen Webinar - About Drum Speed / Changes in flavor / Live roasting session

In the monthly Giesen webinar, Willem Boot, David Sutfin, and Marcus Young cover topics various topics related to coffee roasting. The topics we focus on in this Giesen webinar: We start off by explaining the function of the Hz / RPM setting on the Giesen machines. For starters, this function changes the speed the drum in your machine rotates. But what does this function exactly do? By testing, Boot Coffee came to the conclusion that the drum speed accelerates the roasting profile significantly. Higher drum speed will translate to more convection heat. Also, the beans will be pushed to the outside walls of the drum which means the conductive heat will be increased as well.