Let's Make Robots!

turning

How to determine how far has my bot turned?

Hi All

I wonder how you determine how far your robot has turned? I have a newly built catarpillar and find it turns a different amount depending on the surface (and of course obstacles).

How do you pro's determine how much your robot has turned?

I guess one could use some form of becons and triangulation or an onboard compass but are there any other methods you guys & gals use?

Thanks

4 wheels with 180 degrees turning

I saw a future concept car on a presentation on a documentary on Discovery Channel.

It had 4 motorized wheels, One in each corner (like a conventional car). But each wheel could turn 180.

It would mean that your car could drive in any direction, and rotate on the spot. Here's a link to a similar concept