When the conveyor belt is in normal operation, the belt speed is not less than 95% of the roller speed.
输送带正常运转时，带速不低于辊筒转速的95％。
If the friction between the roller and the conveyor belt is not enough, the conveyor belt is prone to slip.
如果辊筒与输送带的摩擦力不够，输送带就容易出现打滑的现象。
There are many reasons why the friction between the roller and the conveyor belt is not enough, the common ones are: insufficient tension, load starting, and insufficient friction coefficient of the roller surface.
引起辊筒与输送带摩擦力不够的原因很多，常见的有：张力不够、载荷启动、辊筒表面摩擦系数不够等。
The reasons for the lack of tension are: the tension stroke is not enough, the weight is not enough, the conveyor belt is too long;
张力不够的原因有：张紧行程不够、配重重量不够、输送带太长等；
The reasons why the friction coefficient of the roller surface is not enough are: the adhesive wear of the roller surface is too large, the belt body is too wet or stuck with lubricating oil, and the surface of the belt body is stuck with materials (easy to be dissolved by water).
辊筒表面摩擦系数不够的原因有：辊筒表面包胶磨损太大、带体过湿或粘有润滑油、带体表面粘有物料（易被水溶涨的）。
