How to connect Motor controller

[pcmm]

you forgot the arduino nano
it goes rpi serial to arduino to motor controller to motor, dont just pick a random motor controller and ask for help with it, read thru the forum and find one thats been tested and working for others.
you will save yourself a lot of troubles.

Thanks.  I tried searching the orum for motor controller information with no luck  in the search results.  Interesting that you need an arduino inbetween. (I haven't seen that in any of the documentation thus far.  Any help with good docs is apreaciated.  

Oh and BW  Chrome really hates this site.  everything comes up as "malicious"