EMF problems. Buiilt a wood router 3 axis cnc. Bipolar 2 phase 4 wire steppers Added dampers to x an y. Same hardware used on all 3 axis. Motors tuned the same on x an y, however, x runs smoothly after damper was installed, y does not. If I plug x control wiring into motor y, it runs as smooth and fast as y. When I reconnect the y control lines y stalls out. Both have the same motor and individual power source and controller. Does y have a screwed up controller or emf problem or both? I can drop y ipm to make it run. I was thinking of adding some fast recovery diodes, but I don't know how or where to wire them in. Any help would be appreciated.
Thanks all