Dimensional linear, circular trajectory control with high precision to achieve precision coating. This model can also be used for special coating methods such as conductive plastic coating (with the rotation axis). Dedicated to the LED, relay package, the phone keypad dispensing, PCB board sealed plastic binding, IC sealant, glue punctuate outside speakers, electric irons, laptop computer batteries, cell phones, crafts, digital cameras, and mobile electric rubber-coated shell cloth, 3G products and other precision coating plastic shell shielding coating fields.