cr0wl:
So do you guys have any idea to do that?
I like to use the knob tutorial to do this. Use a potentiometer (knob) as the input. Map that to servo command and send it to the servo. Also print it to the serial monitor.
Carefully turn the knob back and forth until you hear the motor bind. Then back off. Don't leave it with the servo bound up or it can overhead and melt.
Note what values make it bind and put limits in your code to keep it within those boundaries.