The speed of the shredder is relatively slow, which is the feature of the equipment. The speed of the cutter of the shredder can be adjusted and set according to different materials. As for the materials that are easy to tear, the speed of the cutter can be adjusted faster. For example, the scrap light metal material can be easily torn by the shredder. If the rotation speed of the cutter is adjusted faster, the speed can be increased Output value, energy saving and power saving, with the effect of low energy consumption. With regard to the materials with surrounding properties, we can adjust the speed of the cutting tool slower. Compared with tearing woven bags, waste wires and cables, adjusting the cutter speed of the shredder in time can increase the bite force, tear up fully, and tear these surrounding materials faster. It is very scientific to adjust the speed of the shredder's cutter according to different materials. Sometimes it can not only increase the output value, but a