: Higher drum speeds increase threshing capacity but also lead to a higher percentage of broken grains. For instance, increasing peripheral speed from 26.7 m/s to 33 m/s can drop the "whole grain" percentage from roughly 96% to 77%.
: Lower speeds are required to prevent grain breakage, often ranging from 400 to 600 RPM . Zmaj 142 RPM
: Operating at higher engine RPMs allows the hydraulic pump to recover pressure faster during intensive tasks like steering or operating the header. : Higher drum speeds increase threshing capacity but
: This varies significantly depending on the crop: : Operating at higher engine RPMs allows the
: Use the drum variator to fine-tune RPM while the machine is running. If you experience grain loss in the straw, slightly increase the RPM; if you see cracked grain in the tank, decrease it.
: If your dashboard tachometer is unreliable, you can use a handheld digital pulse tachometer to verify actual speeds at the pulleys.