I am using 2 identical DC motors and a castor wheel. The motors are connected to L293D motor driver and are controlled by RPi.
The robot is not going straight. It veers off to the right. I am running both the motors at 100% PWM.
What I tried to correct the error:
- I adjusted the PWM of the wheel going faster to 99%, but the robot just turns to the other side;
- I adjusted the weight on the robot and the problem still persists.
I once tried to run the motor without any load. Is that the cause of this, as I was later told that, running a DC motor without any load damages them?
If that is not the cause, then please tell me how to solve this problem without using any sensors for controlling it.