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CNC Assembly: 3 axis r igid PVC structure NEMA 17 Motors and lead screws

P14311: PCB Isolation Routing System. Team Members: Joseph Post (EE), Sarah Duman (IE), Richard Kalb (EE), Zo ё Rabinowitz (ME), Kevin Richard (EE), Marley Collier Sears (ME), Matthew Clark (ME) (photo, from left to right) Guide: Vincent Burolla 2013 - 2014. Customer:

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CNC Assembly: 3 axis r igid PVC structure NEMA 17 Motors and lead screws

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  1. P14311: PCB Isolation Routing System Team Members: Joseph Post (EE), Sarah Duman (IE), Richard Kalb (EE), Zoё Rabinowitz (ME), Kevin Richard (EE), Marley Collier Sears (ME), Matthew Clark (ME) (photo, from left to right) Guide: Vincent Burolla 2013 - 2014 Customer: The Center for Electronics Manufacturing & Assembly (CEMA) Jeff Lonneville, Lab Technician Sponsor: Scott Systems Robert Scott, Owner Problem Statement Develop an in-house prototyping system to create wiring patterns and component holes on printed circuit boards (PCBs). Objectives • Handle boards up to 5” x 5” • Reliably and accurately drill and mill patterns with ± .001” tolerance • Easy and safe to use PCB milling in progress Implemented Features PCB Prototyping Process • CNC Assembly: • 3 axis rigid PVC structure • NEMA 17 Motors and lead screws • Off the shelf Router and Specialty collet • Vacuum Table to hold down work piece • Registration system to align board • Web Cam to view work on monitor display • Limit and Homing sensors to detect position • Debris Management: • Shop Vacuum and hose attachment at point of router contact • Safety Systems: • Emergency Stop Button • Interlock System • Electronics: • Motion Control board • Motor Driver boards (3) • Input/Output board • 5, 12, 24V power supplies • Router and Vacuum Relay • Mach3 Software • Open source CNC control program Finished PCB Testing and Analysis Suggestions for Improvements • Implement automatic (no operator involvement) homing functions in all three axes • Create macros in Mach3 to improve system flow • Optimize tool path to minimize machining time • Machine vacuum table sacrificial layer from nylon to ensure a level workspace • Develop visual alert system through enclosure lighting to notify the operator about emergency situations

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