Encoders and control - Encoders are the sharp point of the machine safety arrow and make automated control safe

摘要

AT its core, automation is defined by control loops, but automated machine safety is more aptly described as an arrow. And that arrow's sharp point is often an encoder that makes it possible for the control system to know where it is and how fast it's moving. With that knowledge, the system can not only avoid trouble, but act appropriately when circumstances bring trouble to its door. Trouble, of course, can take many forms. It is generally any event that can cause harm to the machine itself or to people or equipment around it. For moving-machinery applications, such events include intrusions into the machine's work space, failures of machine components, or power upsets.