Loosen the bolts on the angle bracket that mounts the table drive air cylinders (4 places - 2 bolts each, refer to bolts labeled A) to the 80/20 extrusion located under the table. Also loosen the bolts on the center joint plate that ties the two table halfs together and the pusher bar that spans the gap.
Adjust the table by manually pushing the table until a consistent dimension from the front of the e bar to the front face of the pusher bar is achieved.
Lock down the bolts on the angle bracket.
Retract the table.
Double check that the gap is consistent from the rear of the lower sealing bar to the front of the pusher bar.
The material stops may have to be adjusted after this operation.