How to choose the right feedback option

The spectrum of rotary position and speed feedback devices on the market is increasing in breadth on a daily basis. The question is no longer just whether you should go with an encoder or a resolver. The number of questions can be mind boggling. Beginning with “Should I go absolute or incremental?” Should I go magnetic or optical? There are other manufacturers out there that make capacitive and inductive. Should I be considering them as well? Do I need commercial, industrial, heavy, extreme, or maximum duty? Answer all these questions, and it’s easy street right? Wrong. When it comes to resolvers, you need to know size, speed(s), and electrical interface. With encoders, you need to know resolution, mounting, output, and connection.