Hexbot the home made hexapod robot

The HEXBOT is constructed from 12 (cheap) model airplane servos. Each leg moves laterally on one servo and vertically on the other. Conveniently, this type of servo runs on 5 volts. These servos need only a specific width pulse to position it. Once it arrives at its target location, it draws very little power (about 10 ma). Power is provided by a set of four AA metal hydride batteries mounted underneath. Neither the servos or the PIC requires highly regulated power.

An earlier version of the hexbot had legs made out of 1/4 inch aluminum square stock with a 90 degree bend. This caused the vertical servos to draw a lot of power just standing still. It could barely walk. The new leg design uses a piece of 1/2 inch aluminum angle stock (see the close-up), and two peices of the 1/4 inch square stock. The parts are joined with #6 screws and those plastic-insert ‘aircraft’ nuts. The nuts are tightened just enough to take up the slop but still allow movement.

Hexbot the home made hexapod robot: [Link]