How do you make a robot that sticks to walls and moves?

Answer 1

Different robots have different modes of motion and methods of control.

Another PerspectiveAs the above answer suggests, there are multiple ways of guiding a robotic device along a fixed path, among those methods are:

• Embedded wire. Using this method, engineers place a wire in the flooring and inject a signal into the wire that a robotic device can detect. Antennae are then placed on the robot that can detect the relative wire location and the robot will know to correct guidance, either slightly right or slightly left.
• Inertial guidance. The robotic device can be given intermediate points to detect and given steering direction and distance traveled, the robotic device can calculate it's relative position and what actions must be taken to reach the goal. Multiple intermediate goals can be placed along the path and the robotic device can "sense" intermediate points with RF antennae, magnet sensors (meaning that magnets must be installed in the floor), video sensors (meaning that guidance images such as bar codes or other identifying markers must be on the floor or walls)
• GPS guidance, if the robotic device can calculate a current position and direction, it should be able to calculate what is necessary to get to the goal destination.

This names just a few. Robotic guidance systems are limited only by the creative ability of the engineers.

Answer 2

Glue it