Main Configuration of Mini Robots
The main trick making the mini robot or design affordable and simple, is the robot’s chassis should actually a main board of robot, where the some supports for wheels should also made for the small parts of the copper boards should soldered for it. All motors and skids are mounted to the main PCB of the mini robot.
For the electronics hobbyist, the PCB manufacturing is the skill which will learn sooner or the later, so the design of it lets you use the experience of yours in the PCB manufacturing just to design the high precision chassis to the robot. Here, it is very clear that to drive a train of the robot is a differential type, which gives meaning of two rear wheels, which are responsible for moving a robot the forward and to backward, but it is also used in the movement of the robot such as to have a turn in the any required direction. The speed of it depends upon the difference of the right and the left wheels.
The main and the first thing which is required need some explanation of the fact that here you get only 2 wheels, so while there has not being a best thing to do, the caster wheel may sometimes be changed with a skid, so when a robot weight and the size are not very important, and when a robot is designed specially for the indoor environment, where robot can turn or move on relatively the smooth surfaces, and where the friction wont be the serious problem.
It may be seem very strange that battery was settled or placed on top of a robot, and its actually very important mistake, as the battery at this height is totally destabilize a robot because it is raise the center of the gravity, also increasing a moment of the inertia. There are so many tutorials available which provide the more information about the moment of inertial and robot stability.