Using MVRT Parts Library

Whilst CADing a robot, a lot of off-the-shelf parts are commonly used, such as Screws, Washers, Bearings, etc. In order to prevent the need to create these models from scratch each time, MVRT uses a Parts Library for common items. This Library can be downloaded through GrabCAD. The video below along with the text will go over the usage of the Parts Library.

Note: DO NOT upload any accidental changes made to the parts library since these changes can cause problems when another person uses the parts library.

1. Make sure your computer’s parts library is updated so that you have access to all parts.

2. The parts library can only contain so many parts and it is possible for you to need to download parts that aren’t available. But make sure to first look through the library since it allows anyone in the MVRT GrabCAD to view your entire CAD without problems.

3. The parts library is organized into electronics and pneumatics, hardware, and motion. You will most likely not have to access the CNC and iParts folders when creating your own designs.

4. The electronics and pneumatics folder contains electrical components that will mostly be used to create the electrical bellypan. It will also be used for any sensors that your mechanisms may require.

5. The hardware folder contains screws, nuts, spacers, versa gussets, standoffs, and shaft collars. Most of the common sizes of screws we use are in the parts library. If your mechanism requires a specific size that isn’t available in the parts library, refer to https://www.mcmaster.com/standard-socket-head-screws and navigate to Socket Head -> Alloy Steel Socket Head Screws and browse through the catalog to find your specific screw.

6. The motion folder of the parts library contains parts such as bearings, gears, hubs, gearboxes, motors, sprockets, and wheels. These folders contain the most commonly used parts by our team. If your design requires a part not available in these folders, try to search the website of that specific part for CAD files. VexPro Parts contain downloadable CAD files at the bottom of the web page.

7. When using the parts library, remember to create CAD models that are as similar to the real life version as possible since it allows you to check for any collisions, interference as well as gauge the parts required to build your mechanism. This will ensure that you aren’t missing parts when you build your mechanism and there aren’t any surprises about the mechanical design.