Filling

In many filling applications, a rotary encoder is used for table positioning. Feedback from the encoder helps ensure that the item to be filled is in the correct position prior to activation of the filling mechanism. 

For example, bottles, tubes, cans or cartons can be transported to a filler via a conveyor, rotary table or other delivery system. The encoder can be mounted to a motor, drive shaft, or another suitable axis. When the proper number of counts is detected, the controller sends a command to activate the fill system. In many designs, the fill process is completed while the containers are still moving.

Augers, rotary fluid dispensers, and peristaltic pumps may utilise encoder feedback. Often other sensors such as vision, proximity or laser, are also used to detect container orientation and container location. 

Rotary encoders may also be used to control the motion of a fill nozzle or dispenser that needs to be lowered to and withdrawn from the container.  Additionally, some filling mechanisms travel in sync with containers as they are transported, and this motion also usually requires encoder feedback.