Crown pulley is the most popular tracking method for steel belts. For example, when pulley diameter is 100mmand belt size is thickness 0.2mm and width 200mm, curvature radius is R50,000.
This is same as crown height 0.1mm.It is significantly minute compared with millimeter-order crown height for plastic and rubber belts.
Yet crown pulley sometimes does not work, when belts are very thick, very wide, very long, or due to other factors such as conveyor structure and assembly precision.
Title: Steel Belt and Tracking: 2. Crown pulley