copiers, printers, fax machines, card machines, attendance machines, etc ... are precision office equipment that integrates optical, mechanical, and electronic technologies. they are formed on photosensitive materials by using small electrostatic toners and using the principle of electrostatic the electrostatic latent image attaches tiny toner to the photosensitive material, and then transfers it to the paper to obtain the required copy. this process is performed using the characteristics of static electricity. therefore, paper dust, floating toner, etc. tend to adhere to the transmission components, optical components, and high-voltage components inside the machine, but the existence of these will only affect the quality of the copy. if left unattended, it will increase the driving load of the machine and hinder the removal of heat, which may be the cause of the machine failure.