皮带要保持松紧合适，不跑偏，托辊轴承转动正常表面光滑，没有东西卡住皮带，挡皮合适皮带上料未送完不停机即可。

The belt should keep elastic and not deviate. The roller bearings rotate normally, the surface is smooth, nothing is stuck to the belt, and the right leather is not suitable for belt feeding.