METHOD OF PRINTING WITH A HEIGHT-ADJUSTABLE PRINT HEAD

A method of printing with a printing system comprising:- a print surface (18a);- a feed mechanism (42) arranged for feeding a print substrate (60) onto the print surface;- a sensor (62) capable of detecting a height of an image receiving surface of the print substrate (60) relative to the print surface (18a); and- a print head (54) disposed above the print surface (18a) for forming an image on the image receiving surface, the print head being adjustable in height relative to the print surface,characterized in that the following steps are performed at least at a start of a print run:a) if the height detected by the sensor (62) is within a predetermined range, discarding the print substrate and feeding a new print substrate; andb) changing the height of the print head (54) only on condition that an event in which a print substrate has been discarded in step (a) has occurred at least twice.