Analysis, implementation, and educational impact of digital fabrication techniques using desktop machines.

摘要

Computer-Numerical-Control (CNC) technology has evolved rapidly over the past few decades. Manufacturing tasks that were once reserved for an expensive, large-scale CNC machine can now be performed on an economical, desktop-sized machine. Using these smaller CNC machines, engineers, students and hobbyists can translate CAD models into functional prototypes without having to engage a machinist. This ability to use CNC machines enables the engineer to gain knowledge of the manufacturing process, as well as appreciate the time it takes to machine complex geometry. This direct exposure to the manufacturing process provides valuable insight into component design by taking into consideration the manufacturing time and cost earlier in the design process.;The purpose of this project is to understand how to select, deploy and implement CNC-based hands-on prototyping and manufacturing experiences in a laboratory environment. An initial research study of inexpensive desktop CNC machine kits and associated hardware/software has been performed. Using this data, ten desktop CNC machines have been acquired and deployed for engineering education in a Mechanical Engineering laboratory at the University of Massachusetts Lowell. A preliminary study of student motivation and attitude towards prototyping and more generally, engineering has been performed. The preliminary results indicate that students experience higher levels of intrinsic motivation towards hands-on, project based learning pedagogies.