"Two different technologies. If you are looking for that kind of 3D printer there is already one available as a kit and soon the entire plans and software will be released to public. Go to http://www.b9creator.com"
"Does the density or shape of the ABS change the material contraction amount? If not both should remain the same other than the normal 3D printing stubble. You could also make the male part of the snap slightly larger and sand it to a more precise…"
"I'm very curious about the cost of materials as well.
As far as construction. Did you consider welding the pieces together with acetone instead of using bolts or screws? That would reduce the weight and my understanding from others is the…"
"There is nothing wrong with Sketchup. I've tried other CAD programs and unless you want to spend countless hours learning how to do things "right" there is no need. Sketchup files can be cleaned up and exported into many formats. I…"
"I think any vehicles with props or potentially dangerous mechanics should have a dead man's switch from a remote which must be held down during the entire course. Maybe held by the judge or an official just like the robot wars use.