Patent ID: 6447098
Filing Date: 2002-09-10
Classification: B41J,G06K

Abstract:
A dot recording apparatus that records dots on a surface of a printing medium comprising:a dot record head having a plurality of dot forming elements, which are used to form dots; a main scan drive unit configured to carry out main scan, which shifts at least one of the dot record head and the printing medium in a main scanning direction; a sub-scan drive unit configured to carry out sub-scan, which shifts at least one of the dot record head and the printing medium in a sub-scanning direction perpendicular to the main scanning direction; a first storage unit configured to store first displacement data, the first displacement data substantially representing deviations of dot recording positions in the sub-scanning direction with respect to the plurality of dot forming elements from a reference dot recording position by a reference dot forming element selected among the plurality of dot forming elements; a second storage unit configured to store second displacement data, the second displacement data substantially representing feeding errors of the sub-scan in the sub-scanning direction; a record mode storage unit configured to store a plurality of dot record modes, each of the dot record modes specifying operations of the main scan and the sub-scan to record dots, the plurality of dot record modes having a same dot resolution and a substantially same recording speed but different combinations of feeding amounts for the sub-scan carried out in respective intervals of adjoining passes of the main scan; and a control unit configured to control the respective units, wherein the control unit comprises a selection unit that selects one dot record mode among the plurality of dot record modes stored in the record mode storage unit, based on the first displacement data and the second displacement data.