Inductosyn and Modern Rotary Encoders Comparison

This technical report presents a comparison between Inductosyn devices and modern rotary encoders, highlighting the features and advancements in performance over the past decade. Inductosyns, produced by Farrand Controls/Ruhle Companies, utilize inductive principles and are characterized by their non-contact design, flat rotor and stator configuration, and high accuracy of 1 arcsecond. The report details the advantages of modern rotary encoders, which now achieve resolutions and accuracies previously exclusive to Inductosyns or optical encoders in controlled environments. These rotary encoders offer on-board digital outputs, such as SSI and BiSS, at a significantly lower cost and without export restrictions. The report includes a comparison table outlining accuracy, resolution, IP rating, cost, and availability of inductive, capacitive, and Inductosyn technologies. The document concludes with a note on Everight Position's commitment to assist in maintaining existing Inductosyn setups and potential migration to modern rotary encoders.