The external structure of the shredder is shown in Figure 11, the principle of the control system. After the shredder is powered on, the power indicator is on and the system is in standby, waiting for the user to put paper. When the paper feed sensor detects that paper is loaded, the shredder starts to work and shreds the loaded paper.

The shredder can load up to 5 sheets at a time; if more than 5 sheets are loaded, the overload detection module issues a shutdown command to the shredder and ejects the loaded paper, prompting the user that there is too much paper, please reload Into. After the shredder works for a period of time, when the paper full sensor detects that the shredder is full, the shredder stops working, and sends a paper full alarm to the user through the alarm display module to remind the user to discard the paper scraps in the shredder.