But this robot is designed to turn on a dime and be able to move sideways apart from the usual four wheel powered platforms maneuvering.
For this ible i will be assuming that you are familiar with Lego NXT sets and i am just sharing with you what i have learned in making this robot. Mainly some pictures of the mechanisms i use, guidelines and tips
The objective of this project was to build a robot that has as many degrees of freedom as possible on the floor with the minimal amount of motors and NXT(s) used.
You could of cause get better results with omni wheels like mecanum wheels. but this is what i have.
Step 1: First Up, Some Videos
Step 2: Powering Your Wheels
the pictures below will show a break down of the assemble
It is VERY important that nothing moves except the gears. This is because your gears will be subjected to very high torque (by NXT standards) and if any of the supports come loose, the gears will slip and it will fail.
the gears i used are not very conventional looking and these gears provide good contact as well as smooth power transmission.
the second third gear was used to reverse the direction of the wheels so that the wheels spin in the direction that will not oppose the swiveling action, its a bit hard to explain but you will get what i mean when you try it out
Step 3: Powering the Swivel
the key here is to have the gears turn the turntable
Step 4: The 3 Swivel Angles
For a sample of the programming i used, send me a PM. (i used NXT-G)