Line follow sensor spacing ??
October 13, 2009
I am a bit embarassed to be asking this but... With everything I have done with Walter, I have never played with a line-follow set up. Now, the electronics I have down solid but I am a little fuzzy on the theory of opperation. I intend to use 4 sensors. Where do they go?
Lets assume the robot is directly centered above the black line on a white background... Should all 4 sensors be looking at white? This set-up seems that it would allow for 2 "steps" or "degrees" of steering --I.e. one sensor sees the line and turn a little or 2 sensors see the line and turn a lot.
The 2 inside sensors see the line when the robot is centered and the robot turns when an outside sensor sees the line or when an inside sensor looses the line.
Which is better? Any other thoughts?
BTW-- the robot will be going very slowly when the line-follow mode is engaged.