Marble Roller Coaster

Model Overview & Print Notes

Summary UPDATE: I've doubled the diameter of the Archimedes screw shaft to make it more durable. I've also added a hex boss for the spur gear to attach. The updated files are: marble-coaster-lift-v2 marble-coaster-screw-v2 marble-coaster-lift-top-v2 marble-coaster-spur-gear-v2 Lego compatible marble roller coaster with Archimedes screw lift. Should work with 14.5 to 16.5mm diameter marbles or bearings. These have a very tight fit with real lego pieces with my printer (your mileage may very). Uses this Lego TT motor. Parts required for lift (see post printing notes): marble-coaster-lift-v2 - 1 marble-coaster-screw-v2 - 1 marble-coaster-lift-top-v2 - 1 marble-coaster-pinion-gear - 1 marble-coaster-spur-gear-v2 - 1 marble-coaster-lift-ramp - 1 Parts required for short track: assembled lift - 1 marble-coaster-straight - 7 marble-coaster-short-straight - 1 marble-coaster-ramp - 6 marble-coaster-180 - 3 marble-coaster-180-banked - 1 marble-coaster-90 - 3 marble-coaster-90-banked - 1 Parts required for long track with switch: All parts from short track minus two 180s marble-coaster-switch - 1 marble-coaster-switch-blade - 1 marble-coaster-180-short - 2 (these are used right after switch) marble-coaster-short-straight - 1 marble-coaster-ramp - 3 marble-coaster-90 - 2 marble-coaster-90-banked - 1 marble-coaster-short-straight - 1 marble-coaster-90-drop - 1 Video Video of version 2.0 with track switching Print Settings Printer Brand: Creality <p class="detail-setting printer"><strong>Printer: </strong> <div><p>Ender 3</p></div></p> <p class="detail-setting rafts"><strong>Rafts: </strong> <div><p>No</p></div></p> <p class="detail-setting supports"><strong>Supports: </strong> <div><p>Yes</p></div></p> <p class="detail-setting resolution"><strong>Resolution: </strong> <div><p>.2mm height .4mm width</p></div></p> <p class="detail-setting infill"><strong>Infill: </strong> <div><p>20%</p></div></p> <strong>Filament:</strong> Hatchbox PLA <br> <p class="detail-setting notes"><strong>Notes: </strong> </p><div><p>I used supports only from the build plate and enabled support roof with a thickness of 1mm.</p></div> Post-Printing Pinion gear opening needs to be chamfered with an exacto knife in order to press fit onto motor shaft. Spur gear opening needs to be drilled to fit with the Archimedes screw and glued in place. Long end of Archimedes screw faces up.