Ive just got my robot moving for the first time..last night..
i am using two steppers ,one for each back wheel.
the two steppers are connected together..ie driven by the same drive transistors..i will drive them seperately after i get four more IRF 510's
i realized thet i had to run the second one in reverse so i made the proper connections
something very strange happened ..
When all power was off and i turned one wheel ..the other wheel turned in the same direction..!!
so i turned it the other way .. the other wheel turned in the other direction!!...hmm..sort of an electronic mini car differential