hey steve, more than likely the operating switch is not set correctly. the switch is mounted on the inside right bottom of the carriage. if you loosen the screw on the outside of the carriage and pull the top of the switch to you and then tighten it up you should be ok. if not then the needle brush may be your problem. is it sticking only on theleft side of is it both sides?
let me know.
george sammons, November 2012