Patent ID: 8177320
Filing Date: 2012-05-15
Classification: B41J

Abstract:
1. A carriage of a liquid drop discharging device in which an encoder sensor is arranged to read slits on a linear scale at a slit reading position, comprising: a stain detection part to detect a stain on the linear scale based on position information output from the encoder sensor; an encoder sensor moving part to move the encoder sensor from the slit reading position in a width direction of the linear scale; and an encoder sensor movement control part to control movement of the encoder sensor from the slit reading position by the encoder sensor moving part based on stain information output from the stain detection part, wherein the stain detection part consecutively receives first and second position information items from the encoder sensor after the carriage is moved in a main scanning direction from a first position to a second position, the encoder sensor reads the slits on the linear scale respectively for the first and second positions, and the stain detection part determines whether a stain is present on the linear scale by comparison of the first position information item and the second position information item.