2019-2020 COMPETITION

CUSTOM CREATED PARTS IN ONSHAPE​

We needed a design to hold the rubber bands on our collecting mechanism in a way that would prevent the bands from randomly falling off, so we built a basic sprocket design; took off every other tooth for spacing; then added the cross design to prevent the bands from lifting. Each cross ensures that it can hold one band that is less than 4mm thick. Since for the most part the rubber bands within that space will not be shifting much, it also ensures that the bands will not break easily.

Rack & Pinion Guiding Bushing (Take 1) 

We did not have enough of these specific pieces and could not buy them inidividually. The original dimensions found in thingiverse are too small in width along the rack. Built our own from the base up starting in Autodesk Inventor for the basic 3d shape. Then moved to Sketchup by saving the design as an stl file to push the holes and bracket shape into the object. ​

Rack & Pinion Guiding Bushing (Final)

The inner width is too small. Our new idea is to take the original design, copy and paste them together in a line, make the entire object a singular group so that it does not print with any gaps, and then connect the corners of the wedge shaped indent between each original guide.

​ORIGINAL CHASSIS DESIGN

The vertical channels will have gears connected to them so that the linear slide that will be connected to the gears can move in order to collect the elements. We decided to take off the omni wheels in the back.

Chassis Design

There are six omni-wheels for the robot to move without running into any traction problems. There’s two arms that will hold the linear slide and the collector.