i have two ballscrews, motors and drivers on my long axis, x and c. all of a sudden my c axis screw decides to turn the wrong way. if i move it posotive its fine and x and c both move posotive. if i move negative x axis moves negative and c moves posotive. i checked all the wiring it all seems fine and even changed to outputs on my bob to see if the bob is iffy. I just cant seem to find the cause as it has been running well for a couple of months now. any ideas anyone