CNC Maintenance and Repair I is the first course of a two-semester course sequence that provides the student with an introduction to Computer Numeric Control (CNC) machinery including the CNC miller and CNC lathe. Topics include: CNC safety, basic CNC components, basic operations of a CNC, overview of the control unit and operator's unit, CNC part programming, CNC operation and interfacing (PMC system), measurement devices, and troubleshooting techniques. This course is designed to give the student an in-depth overview of the design, programming, and operation of CNC machinery, thereby providing the foundation for CNC maintenance and repair.