Spring Motor Rolling Chassis Version 2

cults3d

An updated version of my earlier design (http://www.thingiverse.com/thing:430050), this version features upgraded springs and gears, a weaker pawl, and o-ring tires for superior traction. The first photograph showcases the actual prototype in action. The second photograph is a screen grab of the cad model. The final photograph displays JersyBeast's knob (see UPDATES below). Assembly instructions can be found here: https://www.youtube.com/watch?v=q_Jom7imnNw. A video of the prototype run is available here: https://www.youtube.com/watch?v=zo1t8SiTtTM. To assemble this project, you will need to purchase two #18 o-rings (1 3/16" O.D., 15/16" I.D., 1/8" diameter) and two #111 o-rings (2 1/2" O.D., 2 1/8" I.D., 3/16" diameter), which can be obtained online or at local plumbing supply stores. This design was created using Fusion 360, sliced with Cura 2.3.1, and printed in PLA on an Ultimaker 2+ Extended and Ultimaker 3 Extended. UPDATES: 1) Thingiverse member JersyBeast requested a "friendlier" knob design and generously provided a suggestion for the new model. In response, I implemented JersyBeast's idea and uploaded the result as "Knob and Axle (1).stl". Although I have not tested it yet, I recommend printing it at 100% infill and exercising caution when tightening the spring to avoid damaging the chassis or axle. 2) A printed and photographed version of JersyBeast's knob is now available.