Abstract
In recent days,usually used sheet materials,for example plain paper copier,thin paper,cardboard and circuits tend to be thin and large area.Stack of the sheet should be count before production process because lots amount is usually used.Contact type and non-contact type is used for counting sheet.Corner broken,scratch and dirt adhesion take place when contact type is used.To prevent these problems,non-contact type is suitable.Compressed air separates one by one from sheet stack and positioning sensor count each separated sheet.Double feed,imperceptible corner deforming and flutter take place due to low rigidity when non-contact type is used.To improve non-contact type,ejection area of compressed air should be focused.We fabricate new nozzle that diameter is small utilizing micro-EDM(electrical discharge machining).Counting film sheet is improved with new machine.
