Patent ID: 7434907

Claim:
A method for correcting positional deviation of ink dots arising from bi-directional printing with a printing apparatus, the printing apparatus including a print head and a platen having a platen gap, which is a gap between the print head and the platen, the platen gap being adjustable to a plurality of values, the method comprising the steps of, (a) providing different positional deviation correction values for the plurality of values of the platen gap, the positional deviation correction values being to be used for correcting positional deviation of ink dots in bi-directional printing; and (b) selecting a positional deviation correction value according to the value of the platen gap, and correcting positional deviation of ink dots in bi-directional printing using the selected positional deviation correction value, wherein the printing apparatus is capable of carrying out printing under each of a plurality of printing conditions each defined by a combination of a plurality of parameters including at least the value of the platen gap and a user specified print parameter, wherein the step (a) comprises providing respective positional deviation correction values for at least two printing conditions corresponding to at least part of the plurality of printing conditions, and wherein the step (b) comprises determining a positional deviation correction value according to the combination of the plurality of parameters in bi-directional printing.