Patent ID: 8029086

Claim:
A printing device comprising: a first print unit that includes: a first print head that discharges ink onto a print medium according to print data; a first print head control unit that controls the discharge of ink from the first print head; and a first print head feeding unit that moves the first print head in a main scanning direction relative to the print medium; a second print unit that includes: a second print head that discharges ink onto a print medium according to print data; a second print head control unit that controls the discharge of ink from the second print head; and a second print head feeding unit that moves the second print head in the main scanning direction relative to the print medium; a first medium holding unit having a holding surface for holding one print medium; a second medium holding unit having a holding surface for holding one print medium; a first medium feeding unit capable of moving the first medium holding unit to and from in an auxiliary scanning direction orthogonal to the main scanning direction; a second medium feeding unit capable of moving the second medium holding unit to and from in the auxiliary scanning direction in parallel with the movement of the first medium feeding unit; a first control unit that controls a printing operation of the first print unit; and a second control unit that controls a printing operation of the second print unit, wherein, when the first control unit controls the first print unit to execute printing and when the second control unit controls the second print unit to executing printing, if an error related to one of the first print head and the first print head feeding unit occurs, the first control unit controls the first print unit to stop printing, while the second control unit controls the second print unit to continue printing, and if an error related to one of the second print head and the second print head feeding unit occurs, the second control unit controls the second print unit to stop printing, while the first control unit controls the first print unit to continue printing.