Patent ID: 8783982

Claim:
A media processing device comprising: a conveyance path configured to convey a recording medium; on one side of the conveyance path a first recording head configured to record on one side of the recording medium, a first carriage configured to carry the first recording head, a first conveyance unit configured to move the first carriage on a first carriage shaft, a first scale having a plurality of first slits of a specific width formed with a specific interval therebetween, and at one end thereof a second slit of a different width than the first slit, and a first detection unit that is carried on the first carriage and detects the first slits and the second slit of the first scale; and on the other side of the conveyance path a second recording head configured to record on the other side of the recording medium, a second carriage configured to carry the second recording head, a second conveyance unit configured to move the second carriage on a second carriage shaft, a second scale having a plurality of third slits of a specific width formed with a specific interval therebetween, and at one end thereof a fourth slit of a different width than the third slit, and a second detection unit that is carried on the second carriage and detects the third slits and the fourth slit of the second scale; and a control unit configured to drive the first conveyance unit and moves the first carriage a first specific distance away from the one end of the first scale, to reverse and move the first carriage at least until the first detection unit detects the second slit, to set the first carriage home position based on the position where the second slit was detected, to drive the second conveyance unit and moves the second carriage a second specific distance away from the one end of the second scale, to reverse and move the second carriage at least until the second detection unit detects the fourth slit, and to set the second carriage home position based on the position where the fourth slit was detected; wherein the first scale and the second scale are disposed so that the end of the first scale to which the second slit is disposed, and the end of the second scale to which the fourth slit is disposed, are at the same end on opposite sides of the conveyance path.