
Calculating Conveyor Power for Bulk Handling
The CEMA historical method allows the designer to select an appropriate percentage of sag between the carrying idlers, to prevent lumps or material from coming out of the conveyor belt. The three values CEMA provides are 3%, 2%, and % sag Those percentages are based on material lump size, the proportion of lumps vs. fines, and the idler troughing angle.