The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2011
Filed:
May. 25, 2004
Hiroaki Kato, Kanagawa, JP;
Hiroaki Kato, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A carriage drive control method capable of detecting the acceleration of a carriage at low cost, improving external disturbance suppression of the carriage, and thus improving image quality. This method is applied to a printing apparatus which prints by relatively moving on a printing medium a carriage to which a printhead is mounted. In the printing apparatus, the moving velocity of the carriage is detected, the acceleration of the carriage is detected on the basis of outputs from first and second strain gauges which are respectively attached on the two sides of a fixing portion for fixing the carriage on a belt for transmitting a drive force from a carriage motor to the carriage, the carriage velocity is compensated on the basis of the carriage acceleration detected for the detected moving velocity of the carriage, and driving of the carriage motor is feedback-controlled on the basis of the compensated carriage velocity.