US 12,269,279 B2
Printing device and printing device control method
Atsushi Miyasaka, Shiojiri (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on May 15, 2023, as Appl. No. 18/317,284.
Claims priority of application No. 2022-080700 (JP), filed on May 17, 2022.
Prior Publication US 2023/0373232 A1, Nov. 23, 2023
Int. Cl. B41J 25/34 (2006.01); B41J 2/07 (2006.01); B41J 19/20 (2006.01); B41J 29/393 (2006.01); B65H 18/10 (2006.01); B65H 20/02 (2006.01); B41J 2/21 (2006.01)
CPC B41J 25/34 (2013.01) [B41J 2/07 (2013.01); B41J 19/202 (2013.01); B41J 29/393 (2013.01); B65H 18/103 (2013.01); B65H 20/02 (2013.01); B41J 2/21 (2013.01); B41J 19/207 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A printing device comprising:
a support section configured to support a medium;
a head configured to eject liquid onto a print region of the medium, the print region being a region of the medium that is supported by the support section;
a carriage on which the head is mounted;
a guide that supports the carriage and that extends in one direction;
a motor configured to move the carriage along the guide between a home position and a return position;
a rotary encoder for detecting a rotation angle of the motor;
a linear encoder configured to detect a position of the carriage; and
a control section, wherein
the control section controls a position of the carriage based on output of the rotary encoder and controls ejection timing of liquid by the head based on output of the linear encoder,
the support section faces the head by the carriage moving between the home position and the return position,
the linear encoder includes
a linear scale that extends in the one direction and that has a plurality of slits arranged in the one direction and
a sensor that is attached to the carriage and that is configured to detect the slits,
by movement of the carriage, the sensor moves over the linear scale between a first position and a second position,
the first position is a position on the linear scale where the sensor is located when the carriage is located at the home position,
the second position is a position on the linear scale where the sensor is located when the carriage is located at the return position,
the linear scale includes, between the first position and the second position, a first region in which the plurality of slits are located and a second region in which the plurality of slits are not located,
the sensor is located in the first region when the head faces the print region, and
a length of the first region in the one direction is greater than or equal to a length of the print region in the one direction.