Please look over the jointer, surface planer and drum sander for potential problems as follows:
From my experience, the key to getting a perfectly straight edge on the jointer is to take an absolute minimum “kiss” cut. Heavier cuts with our machine will result in a cambered or bowed edge, preventing excellent edge glue-ups. Something is not right with the jointer depth adjustment and lock handle?
Both the surface planer and drum sander are not feeding correctly. From my experience, the feed rollers are probably out of adjustment (not perfectly horizontal).