We have a smaller slide on the bedroom, also Schwintek, that has worked perfectly every time. I'm thinking that the motors and controller have been replaced on the big slide, but that final alignment adjustments have definitely been off. Have an appointment at the dealer's in 2 weeks for this problem and I plan to emphasize getting it properly aligned.
2011 Jayco Greyhawk 31DS with wife & 2 dogs
06 Jeep Grand Cherokee LTD