Hi Turi,
Thank you for using the Support Forum. Please make sure that you have the paper guide snuggly up against the paper in the document feeder. Also make sure you have looked at the solutions for crooked copies from the support page for your machine. If these solutions do not help please consider contacting your support centre for further assistance.
workcentre 3550
Copying 20 page from document feeder first page is ok than the image shifts gradually to the left. In the last page 1/2 of the image disappear.
Thanks