Yes wire the 4th axis as A. Setup the A ports and pins as wired. You will the control the rotation of the 4th axis in relation to the axis you slave it too. So you set the DIR pin of the A axis state to either low true or high true to get it to rotate the direction you need it verses the slaved axis. No motor wiring changes needed. Before you mechanically connect the slaved axis motors, do the software setup and test it.
__________________
Phil, Still too many interests, too many projects, and not enough time!!!!!!!!
Vist my websites - http://pminmo.com & http://millpcbs.com |