It most likely is out of square. I have the same problem with my Sprint. I keep a tape measure near by and always measure the end of the table to the bar in front of the print head. I do this every few prints. As for fixing it. You will need to ensure the nut under near the print table is loose, square the print table up and tighten the nut back up. I haven't found a permanent solution, but you have to keep the nut tight...I am printing on the Anajet Sprint. The image is coming out running down hill. Is my print platen out of square? If so, how do I square it back up?