When changing the cutter first, first turn off the main motor, wait for about 2 minutes, and confirm that the transmission belt has completely stopped. Put the two wooden cutter changers under the blade, and set the cutter selection switch on the switch panel. At the tool change position, the knife function selection switch must be in the cutting position. Use a sleeve to rotate the nut on the end face of the pulley, remove all the connecting screws on the blade, and then use an Allen wrench to push the knife-hanging device inward for about 4 millimeters. The brake of the knife device is disengaged, and the rotary knife hanging device makes the blade fall smoothly on two wooden knife changers. Install two knife change handles, remove the knife, and pay attention to supporting the knife to prevent overturning and hurting people.