Here are some PDFs describing the construction of 5 different varieties of arm. This is a good place to start, as a good arm is central to a good robot.
If you're in the mood, look below to see some mechanisms we find neat.
Rack and Pinion-Kevin Fialkowski -------------------------------------------------------------------------------------------------------------
Uses:
- gearing up the small motors to make them really fast for wheels - gearing up the large motors for an arm if needed - something else -Brent Blasingame Iris Mechanism - Amanda Rabalais and Toni Lunneman Lever-Actuated Iris Diaphragm - Lorenzo Sukhdeo Geneva Device - Seward Possible Uses:
Better Omni Wheels - Bryan Koch
Cool gear head for team Four Bar Linked Gripper - Saul Hayden
Speed Changing Gear System - Saul Hayden
Gear system that changes direction - Jeremy Reynolds
Possible applications: Planetary gear mechanism created by hand - Jeremy Reynolds Capable of reducing high speeds to slow, powerful speeds.
Wankel Engine - Jeremy Reynolds  http://en.wikipedia.org/wiki/Wankel_engine Wooden Worm Gear - Jacob Stanbery
Taken from: http://makeprojects.com/Project/Roll-Your-Own-Da-Vinci-Style-Worm-Gear/600/1#.UD1Q_MVmzN0 Step 1 — Roll Your Own Da Vinci Style Worm Gear. Step 2 — Guide wrapped around dowel. Step 3 Cutting out worm. Wooden Aperture - Clay Davis |
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