I am building my very first robot (line follower robot) and I am about to finish it. I built my sensor successfully and I am ready to make the wheels move according to the readings of the sensor.
But I encounter a problem. When I tested the movement of my robot, I saw the robot didn't move with applying 5V to 9V to the motors. I mean I get the wheels hardly move and when I lift the robot from the ground, I get the the motors work and spin quickly.
When I apply a 12V to the motors, the robot sometimes moves and sometimes does not.
I wish I can find the reason that makes my line follower robot not moving:
- Do I need a motor with high torque? Do I need to change the motors? (The motors I used in my very first robot look like this)http://comlark.ru/img/32446.JPG
- Do I need a wheel with some other material rather than the rubber? (I use the rubber wheel for my robot and the wheels look like that type)http://shop.rotor.com.sg/images/Product/23316/size.gif
Also, the wheels diameter is up to 1.75 inch.
- Does the friction between the wheels and the ground cause the robot not moving?
- Or what is the reason?