Hello,

So it seems the core issue in this project is how to reliably make the wheels. The resin 3D printer I used before made some ok wheels, though the tolerances where not reliable, also as the optical path became foggy the quality of the teeth degraded.

This time I am experimenting with the SLA process. Conclusion: they are not as smooth as the resin wheels, though they are more consistent. This makes them more usable for this application where a single dodgy tooth renders the wheel useless.

The main problem cited with SLA printers such as the ZCorp machine I am using is brittleness of the parts. This is indeed true, the wheels can be easily be broken by hand. Though the robots weigh only 5g and application of forces in this magnitude will break almost everything on the robot, so the wheels are not a weak link. They are also white enough to star in a tooth paste advert, which I like very much ;)