1. Turn on the input power switch, rotate the potentiometer to select the grinding time of 20S/15S/10S/5S, press the "Start/Pause" button to start grinding the beans. When the grinding time is up, the motor will automatically stop.

2. During the bean grinding process, press the "Start/Pause" button to pause the motor and timer. Press the 'Start/Pause' button again, the motor will resume operation, and the timer will continue.

3. During the operation of the motor, the potentiometer changed the time gear and started timing with the new gear.