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• Carriage drive mechanism
The carriage is installed on the carriage belt, carriage guide shaft and car-
riage guide rail, and moves reciprocally in the horizontal direction by
power from the carriage motor. The carriage position is detected by the
home position (photo-interrupter) sensor installed at the rear side of the
carriage. When printing is started, the home position (carriage reference
position) is detected by the home position sensor passing the light-shading
plate of the printer frame. During printing, the carriage position is judged
by the printer controller counting the number of motor drive pulses.
Fig. 4-61 Carriage Drive Mechanism
• Print deviation compensation mechanism
The carriage motor load is adjusted and the carriage position is compen-
sated to prevent print deviation caused by changes in the BJ cartridge
weight and error during bi-directional printing. During detection of the
home position at the start of printing, the error between the reference value
and the measured value in the home position detection timing is detected
so that the printer controller can compensate the carriage position.
RECORDING SECTION
Carriage guide shaft
Carriage guide rail
Carriage
Home position sensor
1
2
3
4
Light-shading plate
5
Carriage
motor
6
ït
çi
4–53
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