动滚筒筒体有冠状和直式两种。其中的冠状筒体即筒体为"鼓形"形状，可以有效的防止皮带跑偏。同时它的表面经过特殊加工处理，具有双向螺纹，增大表面摩擦力，防止皮带跑偏。用户只需做好正确的型号的选择与后期的安装即可大大降低出现打滑这一情况。
There are two types of moving drum: crown type and straight type. The crown cylinder is drum shape, which can effectively prevent the belt from running off. At the same time, the surface of the belt is specially processed and has two-way thread, which increases the surface friction and prevents the belt from running off. Users only need to choose the right model and install later, which can greatly reduce the occurrence of slip.