Design and application of an automatic packaging machine controller based on ATmega 128

In this paper we investigate the major function units of an automatic F/F/S packaging machine including bag forming, material filling, sealing temperature control, status display, fault detection and alarm etc. ATmega18 microcontroller is used as the central manager to coordinate the individual control function modules. AC motor is used to fulfill the film drawing in both fixed length mode and colour tag tracing mode. Under the same precision control, it costs much less than using servo or stepper motor. This controller has the advantage of easy installation and maintenance compare to the normal implementation with a complex interface circuit.