3D Modeling in AutoCAD

John E. Wilson, a columnist for CADENCE magazine since 1991, runs a one-person design and drafting service. While the bulk of his work involves mechanical parts, he has worked in a wide variety of other fields, ranging from water treatment plant piping to control diagrams for electrical motors. John has contributed a regular column to CADENCE since 1993 that focuses on the 3D features of AutoCAD and Mechanical Desktop. He is also the author of the book, Mechanical Desktop 5: Parametric Modeling.