When using the corn thresher, the motor should be fixed in place, and then the power supply and grounding wire should be connected to the same line. After turning it, it should be idle for 5 minutes before stopping the machine to check whether the screws in each part are loose, the tightness of the V-belt, whether the lubrication parts are hot, and the tightness of the two new parts. If there are any abnormalities, adjustments should be made. The coarse rubber roller and the fine rubber roller are seamlessly matched. The coarse rubber roller is tightly pressed against the fine roller by adjusting the pressure of the spring through the action of the rocker arm. The larger the spring pitch, the smaller the pressure.