I am printing multiple sets of 150 document (simplex) offset. During offset, the machine collects the first few pages while the output tray offsets. It then spits them out, these pages are supposed to line up with the rest of the book, but instead they go far beyond. At an average, the first page is about 4-6 inches out, 2nd is about 2 inches and the third is about 1 inch out from the rest of the book.
I have attached a picture for reference.
What part is out of alignment or needs replacing.
Thanks in advance.