Marble Track Keychain

prusaprinters

<p>Features:</p><ul><li>beautiful keychain with interesting shape based on a Moebius ring</li><li>nice to watch the different parts join in mid-air during the print</li><li>illustrates that 3d prints can be combined with other objects</li><li>useful as everyone has some key laying around that can use a keychain</li><li>fun little gadget with the spinning marble</li><li>ideal to show-off your printer to a friend and let him/her keep the print as a gift</li></ul><p>See the spinning marble in action:</p><figure class="media"><oembed url="https://youtu.be/JSCNn_XbKaI"></oembed></figure><p>I'm interested in seeing what creative combinations of marbles and filament colors you can come up with. So post a picture of your creation, if you print one.</p><h3>Print instructions</h3><p>I have put two versions for different marble sizes: 13 mm (white marble in pictures) and 16 mm (orange-red marble). I prefer the smaller version for use as a keychain. But since many marbles have a larger diameter, I included a bigger version also.&nbsp;</p><ul><li>Optimized for 0.20mm SPEED profile (PLA)</li><li>Print upright with keyring hole at the top</li><li>Supports: For support enforcers only&nbsp;</li><li>Add a support enforcer box at the bottom to keep the print stable.</li><li>Vertical shells: 4 perimeters</li><li>Detect bridging parameters: On</li><li>Insert a “Pause Print” g-code above point where two halves join to insert marble.</li></ul><p>Small loops may occur near the top overhang. These can easily be removed with your finger nails:</p><figure class="image image-style-align-center image_resized" style="width:50%;"><img src="https://media.prusaprinters.org/media/prints/86797/rich_content/44056798-a3be-41d9-b0d8-5881bd835b98/dsc00060.jpg#%7B%22uuid%22%3A%22ba8e2269-380d-4e59-8499-d590617b6045%22%2C%22w%22%3A1280%2C%22h%22%3A960%7D"></figure><p>NOTE: If you want scale the design to fit a different marble size, try to select a scaling factor that has as little overhang as possible on the layer before the bridge that joins the two halves together in the middle:</p><figure class="image image-style-align-center image_resized" style="width:47.91%;"><img src="https://media.prusaprinters.org/media/prints/86797/rich_content/91464dc6-2c45-4dc2-9bba-20930205e4b1/join1-1.jpg#%7B%22uuid%22%3A%2237bc0459-6337-4964-8dbf-c122e460c192%22%2C%22w%22%3A1280%2C%22h%22%3A960%7D"></figure><figure class="image image-style-align-center image_resized" style="width:48.43%;"><img src="https://media.prusaprinters.org/media/prints/86797/rich_content/3cc2f931-134f-4241-8c2a-d1e6ee50222c/join2-1.jpg#%7B%22uuid%22%3A%2239f0719a-742b-4bc8-90c0-6ab221920093%22%2C%22w%22%3A1280%2C%22h%22%3A960%7D"></figure>