Serial printer adjusting record displacement caused by transport of record sheet, and adjustment method thereof

A method of adjusting record displacement of a serial printer including a recording head recording a plurality of lines at a time in a main scanning direction, comprising the steps of:

• recording, in the main scanning direction, a first test pattern formed of a plurality of line patterns spaced apart by a prescribed distance;
• feeding a record sheet by a prescribed amount;
• recording a second test pattern;
• and
• adjusting a feeding amount of said record sheet based on positional relations between said first test pattern and said second test pattern,
• wherein said step of recording said second test pattern includes the step of recording a plurality of line patterns which are recorded at the same positions in the main scanning direction as the plurality of line patterns in said first test pattern, and which are recorded at positions offset from one another in the feeding direction.

A serial printer, comprising:

• a recording head recording a plurality of lines at a time in a main scanning direction;
• a first drive-unit driving said recording head;
• a second drive unit transporting a record sheet;
• a first control unit controlling said first drive unit to cause said recording head to record, in the main scanning direction, a first test pattern formed of a plurality of line patterns spaced apart by a prescribed distance, controlling said second drive unit to feed said record sheet by a prescribed amount, and controlling said first drive unit to cause said recording head to record a second test pattern formed of prescribed recording patterns;
• and
• a second control unit controlling said second drive unit to transport said record sheet according to a feeding amount determined based on positional relations between said first test pattern and said second test pattern, wherein said second test pattern includes a plurality of line patterns which are recorded, in the main scanning direction, between the plurality of line patterns in said first test pattern and which are recorded at positions offset from one another in the feeding direction.

A serial printer, comprising:

• a recording head recording a plurality of lines at a time in a main scanning direction;
• a first drive unit driving said recording head;
• a second drive unit transporting a record sheet;
• a first control unit controlling said first drive unit to cause said recording head to record, in the main scanning direction, a first test pattern formed of a plurality of line patterns spaced apart by a prescribed distance, controlling said second drive unit to feed said record sheet by a prescribed amount, and controlling said first drive unit to cause said recording head to record a second test pattern formed of prescribed recording patterns;
• and
• a second control unit controlling said second drive unit to transport said record sheet according to a feeding amount determined based on positional relations between said first test pattern and said second test pattern, wherein said second test pattern includes a plurality of line patterns which are recorded at the same positions in the main scanning direction as the plurality of line patterns in said first test pattern and which are recorded at positions offset from one another in the feeding direction.