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The attached OpenSCAD Libraries will generate chassis for small robots.
There is suport for servo based drive and a top mounted servo for ping sensor scanning.
Copy all the scad files into a common directory.
The code has been tested using ABS, printed at .3mm layer height with 1 extra shell and 50% infill.
The parameters for the size of the bot, the board size, etc. are all contained in the file newsumo.scad.
It can be setup to generate a 3D view or printable views for the top, bottom, and sides. Just uncomment the line in newsumo.scad for what you want.
The caster used is from VXB bearings: http://www.vxb.com/page/bearings/PROD/Kit7766
The screws used to assemble it are #1 x 3/8 servo hold down from JR Hobby Hadrware: http://www.jrhobbyhardware.com/shop/index.php?main_page=product_info&cPath=108_109&products_id=255
Generic Robot Chassis by JoeyC is licensed under the Creative Commons - Attribution - Non-Commercial license.
So what's this mean?
We're sure JoeyC would love to see what you've printed - take a photo and share it on Thingiverse as a Make.
To post a Make simply visit this Thing again and click I Made One to start uploading your photo. You can also download the Thingiverse Mobile app (available via Google Play and Apple App Store) to take a photo and upload your Make right from the app!