DECtape Transport Design

This document, reprinted from a 1964 issue of Electromechanical Design, details the development of Digital Equipment Corporation's DECtape transport. It explores the design philosophy behind shifting from conventional stop-start tape systems to a continuous motion design to better serve as an interim processing tool. Key technical areas covered include system requirements for tape storage and handling, the use of AC induction motors for tape propulsion, the application of hydrodynamic lubrication for tape guiding, and the adoption of a polarity-sensing recording technique to ensure speed-independent data accuracy.