Patent ID: 6131276
Filing Date: 2000-10-17
Classification: H05K,Y10T

Abstract:
An electronic part mounting method for converting continuous rotation of a rotary head driving motor into intermittent rotation of a rotary head, said rotary head having plural suction and mounting nozzles, and said rotary head driving motor having variable rotational speeds including at least a first rotational speed for stable suction and mounting of said electronic part when the rotary head is stopped, and a second rotational speed for not changing the suction posture when the rotary head is rotating, the method comprising the steps of:moving said plural suction and mounting nozzles up and down in cooperation with the rotation of said rotary head driving motor; andmounting the electronic parts by said plural suction and mounting nozzles;wherein said rotary head driving motor is accelerated to a higher rotational speed when the rotary head is rotating and the first rotational speed is less than the second rotational speed, thereby reducing the mounting cycle time, andfurther wherein said rotary head driving motor is accelerated to a higher rotational speed when the rotary head is stopped and the first rotational speed is greater than the second rotational speed, thereby reducing the mounting cycle time.