Patent ID: 7258429

Claim:
An adjustment method of print positions for a printing apparatus that uses print heads and forms an image on a print medium by a first printing and a second printing with different printing conditions, comprising the steps of: preparing multiple kinds of dot adjust value obtaining processes capable of determining an adjust value for aligning print positions of dots formed by the first and second printings, the multiple kinds of dot adjust value obtaining processes including an automatic process for determining the adjust value based on an output of an optical sensor reading test patterns printed by means of the print heads and a manual process for determining the adjust value based on information entered by a user; accepting one process selected by the user from the multiple kinds of dot adjust value obtaining processes; and performing respective test pattern printing by the first printing and the second printing that correspond to the selected dot adjust value obtaining process and determination of the adjust value by the selected dot adjust value obtaining process, wherein the automatic process and the manual process differ from each other in test patterns printed by the first printing and the second printing, and an adjusting precision for the positions of dots formed in the first printing and the second printing based on the adjust value determined by the manual processing is higher than that by the automatic processing.