This is my in progress self balancing robot development platform. I wanted to make it modular so it can be customized and built for several different purposes. I have not printed it yet or done any programming, but I made all parts with standard tolerances for PLA with the exception of the tires which are meant to be printed in TPU or something flexible. Most holes are 2.5mm for M3 bolts unless a component called for something else.
This is building on a popular design for this robot made out of laser cut plywood. You can find that project here http://www.brokking.net/yabr_main.html The electronic component designs were downloaded from grabcad.
I have included the fusion 360 design files so that you can modify the robot design to suit your own needs. In the current configuration there is enough room for a pi zero w and an arduino nano, steppers, one arm servo, small camera, laser pointer, some sensors and LEDs. And of course the 2 Nema 17 stepper motors. I used that size since it is most common. My goal is to make a telepresence robot. I may scrap the pi in favor of an android phone, but that would just need a different mount on top. You could make a very different robot.
I also included an exploded parts diagram as well as the xray view from within Fusion 360 and a render with the front lid off.
I am very open to suggestions, feedback, and criticism. I will post photos as it gets built -
When I have code up I will post the github link.
Printed the wheels and tires and adjusted for a perfect push fit with most PLA. You should be able to push the wheel onto the axle without using tools or glue, and still have it be nice and solid. Please download the new wheel file and CAD drawing if you had downloaded the old one.