I had a problem but I solved it. just thought id post for others.
My Y axis motors werent moving smooth. I couldnt see why. I checked everything was tight but not too tight, but it was still rough. I disconnected the motors to check the connections and noticed my white wire on the +x side was broken. A little solder and it was back to its old self. Dont know how i broke just the one wire but I'm glad I found it quickly.