I'm gonna bump this because I have found clarification through lots of googling. If you have the schwintek slide out (two aluminum tracks on the sides of the slide-out), you depress the slide button and hold it for 2-5 seconds AFTER the slide has stopped in either direction. Do not stop the slide, it should either be full out or full in.
Holding the button down does not hurt the motors, the brain box keeps them in sync and synchronizes them every time if you hold the button till after it stops. Failure to do this will result in over stressing one of the motors and may give the appearance that one motor is burned out.
So to answer my own question, there is a limiter on the schwintek system, it cannot be over cranked in the in or out position.