Pocket Cribbage Board

grabcad

The Pocket Cribbage Board is a clever, useful design that improves upon the design of traditional cribbage boards and takes advantage of unique 3D-printing capabilities. The board has the standard 121 holes for a 2-or-4-person game of cribbage. However, the Pocket Cribbage Board is special because it folds in half to function as a case for the playing cards. This compact design allows the cribbage board, pegs, and playing cards to fit easily into any pocket, purse, glove compartment, or other place a board may come in handy for an on-the-go game of cribbage!Another element that makes the Pocket Cribbage Board special is the hinge design, which leverages the unique ability of 3D printers to print working assemblies in a single print. The two sides of the Pocket Cribbage Board are printed together. Applying a small amount of force after printing will break the parts free from each other and cause the hinge to rotate freely. This design would be impossible with traditional manufacturing methods, such as plastic injection molding. It also limits the number of parts, eliminates need for assembly, and prevents the board from ever coming apart.The Pocket Cribbage Board was printed on a RAISE3D N2 Printer using 1.75mm PLA filament. The critical feature of the print is the hinge, where a layer height of 0.1mm was determined to be adequate through testing and research. This layer height allowed the hinge to break free and rotate smoothly after printing. Thus, a finer resolution did not seem to justify the additional print time. A larger layer height, such as 0.2mm, could also work, but 0.1mm is best because it results in a smoother hinge assembly.The model is able to lay flat on the large 12x12” N2 print bed. However, to conform with the 4.75x4.75x4.75” build volume constraint of this competition, a model that prints with the hinge half closed was created. This first orientation is named “Orientation 1,” and the half-closed model is named “Orientation 2.” Orientation 1 will cut down on print time and eliminate the need for support filament, but both models will print successfully. The prints take approximately 21.5 hours for Orientation 1 and 32.5 hours for Orientation 2. Because of these two orientations, the Pocket Cribbage Board can be printed on a variety of 3D printers with varying sizes and resolutions.The Pocket Cribbage Board was designed by Joe Jurss, a Mechanical Engineering student at the Milwaukee School of Engineering (MSOE).