jremington:
In the photo posted in reply #5, you entered the values 416 RPM and 30 N*M torque.Are you wondering whether a motor that is five times more powerful than required is not "good enough"?
As I said before, at my previous robot tank, it was moving nicely ( on the theory and on the experiment environment ) but once it came to carpet at our house, it struggled while turning left and right ( you can see from the video link I shared you at my above comment ). This one is much heavier so I wanted to be sure while buying the right gear dc motor that it is quite expensive and I will give shipping cost, custom cost, and wait a few weeks to get in from United States to United Kingdom ( the pieces I want are not selling at robotshop uk and active-robot websites currently; so I wanted get someone's approval for being at ease before ordering the gear dc motors.
The tank's back and front tracks are separated between each other so it gives me an opportunity to use x4 motors at my tank, like the first robot tank I made before. Shortly, this is my next question:
Should I use x2 motors or x4 motors as using x1 motor driver with one battery on the one arduino mega board?
or
Should I use x2 motors to connect one motor drive and other x2 motors to other motor driver and connect them to the same arduino mega board ?