US 7,597,322 B2
Conveyance apparatus, control method therefor, and printing apparatus
Yuichiro Suzuki, Yokohama (Japan); Hiroyuki Saito, Yokohama (Japan); Kentaro Onuma, Yokohama (Japan); and Hiroyuki Kakishima, Kawasaki (Japan)
Assigned to Canon Kabushiki Kaisha, Tokyo (Japan)
Filed on Jul. 31, 2007, as Appl. No. 11/831,114.
Claims priority of application No. 2006-226700 (JP), filed on Aug. 23, 2006.
Prior Publication US 2008/0048382 A1, Feb. 28, 2008
Int. Cl. B65H 7/02 (2006.01)
U.S. Cl. 271—265.02  [347/101; 700/213; 271/264] 2 Claims
OG exemplary drawing
 
1. A conveyance apparatus which has a first conveyance roller and a second conveyance roller on a downstream side of the first conveyance roller in a conveyance direction, and conveys a sheet, comprising:
a DC motor serving as a driving source for the first conveyance roller and the second conveyance roller;
a first encoder which outputs a first pulse signal in accordance with rotation of the first conveyance roller;
a second encoder which outputs a second pulse signal in accordance with rotation of the second conveyance roller; and
a control unit having a first mode in which said DC motor is controlled on the basis of first information about the first pulse signal when executing a conveyance operation to convey the sheet by using the first conveyance roller and the second conveyance roller, and a second mode in which said DC motor is controlled on the basis of second information about the second pulse signal when executing a conveyance operation to convey the sheet by using the second conveyance roller,
said control unit adjusting the second information on the basis of a relationship between a phase difference the first pulse signal between the second pulse signal before executing the second mode.