Medium position determining devices and image recording devices

An image recording device comprising:

• a conveying mechanism which conveys a recording medium in a conveying direction;
• a sensor that is configured to detect at least a first side edge of the recording medium;
• a scanning carriage that is configured to move in a reciprocating manner in the scanning direction, wherein the sensor is mounted to the scanning carriage;
• a first controller that is configured to move the scanning carriage and to determine a position of the scanning carriage with respect to the recording medium when the scanning carriage moves in the scanning direction;
• a storing unit that is configured to store side edge information which indicates a side edge position of the recording medium;
• and
• a second controller that is configured to control an image recording operation of the recording head based on the side edge information stored in the storing unit;
• wherein, when the sensor detects at least the first side edge of the recording medium the first controller is configured, when the scanning carriage performs scanning for determining the medium position, to:
• move the scanning carriage from a particular position outside the recording medium to a first position within the recording medium via a further position corresponding to the first side edge of the recording medium at a first speed in the scanning direction;
• determine that the scanning carriage is in the first position;
• and
• move the scanning carriage in the scanning direction at a second speed that is greater than the first speed after the first controller determines that the scanning carriage is in the first position.

A method for recording an image using a medium position determining device, wherein the device comprises a sensor, a scanning carriage that is configured to move in a reciprocating manner in a scanning direction, and a controller that is configured to move the scanning carriage and to determine a position of the scanning carriage with respect to a recording medium, wherein the method comprises, when the scanning carriage performs scanning for determining the medium position, the steps of:

• (a) moving the scanning carriage from a particular position outside the recording medium to a first position within the recording medium via a further position corresponding to the first side edge of the recording medium at a first speed in the scanning direction;
• (b) detecting at least the first side edge of the recording medium during a performance of step (a):
• (c) determining that the carriage is in the first position;
• and
• (d) after a performance of step (c), moving the scanning carriage in the scanning direction at a second speed that is greater than the first speed.