Method for adjusting drive roller linefeed distance

摘要

A difference in feed roller (46) diameter from one printer (14) to another causes a media to advance by a different amount for a given rotation of a drive shaft (52) to which the feed roller is coupled. Such variation in advance distance is a linefeed error. Mean linefeed error is determined and corrected by printing a test plot (80) having several areas (82-90). Each area is formed of the same image pattern, but is printed at a different linefeed error adjustment to compensate for mean linefeed error. The different adjustments are prescribed and span a typical compensation range for a given print engine model. The different adjustment factors cause banding (92/94) to occur in some areas. The user picks one of the test pattern areas which has the highest print quality (i.e., least or no banding). The linefeed adjustment factor corresponding to such area is used for normal printing. <IMAGE>