Machine Shop Project - Tech Challenge 2025 (Display)

GREEN BAY DISPLAY Challenge **Machine Shop Project ** (Computer Numeric Control) Questions? Please contact Frank Parker at: Email: franklin.parker@nwtc.edu Phone: 920-498-6384

TRADES & ENGINEERING TECHNOLOGIES Student capacity: Minimum 2, No Maximum

*This is a “Display project” and needs to be completed before the Tech Challenge and brought to NWTC to be judged.

(Manual Machining) Any metal, plastic, wood work piece or part which is machined on one or more types of manual/conventional machine tools (milling machine, engine lathe, drill press). (Computer Numeric Control Machining) Any metal, plastic, wood work piece or part which is drawn with any CAM (Computer Aided Manufacturing) software, or long-hand programmed with G&M code and then created on a CNC machine (milling, turning, routing, waterjet, EDM). All displays will be evaluated on tolerances, surface finish, and functionality, in addition to a display of the blueprint used for machining (all submissions should have a blueprint), additionally a CAM drawing with a print out of the machine code (G&M code) used for CNC parts. Tolerances: • Fractional Dimensions = +/- 1/64 • (Two place decimals) .XX = +/- .01 • (Three place decimals) .XXX = +/- .005 • Angles = +/- 1/2 degree

Surface finish: • Machined surface should be a 125 Ra or better • No burrs or sharp edges present

Functionality considerations: • Complexity of the part (is the part or piece challenging)? • Functionality of assembled parts (does the part or piece serve a purpose)?

Documentation: • All submissions should have a blueprint with dimensions and tolerances (hand-drawn sketch is acceptable) • CNC Parts should have a CAM drawing and Gcode print out