APPENDIX B
■ Appendix B: Appendix B
This appendix covers printing Sandwich robot parts. A 3D printer is so essential to robotics that it will
become as commonplace as the multimeter. The appendix begins with laying out a Lego cross-axle coupler
in a CAD (computer-aided design) program. From there, several failures in creating a rubberized wheel are
followed by a successful hybrid. Finally, the robot’s body connects everything together in a complete custom
package.Getting Into 3D Printing
Most robots are unique creations. Often, you either need to machine custom parts (requiring a shop and
experience) or you need to compromise your imagination by repurposing mass-produced objects (such as
sandwich containers). But with a 3D printer (see Figure B-1), you can quickly design and output exactly the
part you need.Figure B-1. A consumer 3D printer about the size and cost of a small-business laser printer