In many cases, the mechanical components of an older machine can basically operate forever. Critical surfaces can be remachined, and bearings and gears can be replaced again and again to restore lost accuracy and repeatability.
But what about the control system? Sometimes older machines are retrofitted with a new controller to enhance its productivity and extend its useful life. Such refits should not stop with the controller alone. Many of the greatest improvements in machine performance can be obtained by upgrading the entire sensor package as well. Sensors are at the heart of today’s automation systems. They provide the critical information and feedback about what the system is doing, and the status and condition of products being handled and produced.