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AssigneeCanon Kabushiki Kaisha
InventorsKenji Shigeno, Tetsuya Ishikawa, Haruyuki Yanagi, Kentaro Onuma
Estimating the term…
In order to stabilize a performance of a pump employed for processing in an inkjet printing apparatus such as sucking ink from a printing head with a low cost configuration and without the need of using any specific detecting unit, the following configuration is employed. Namely, a tube pump having a member with a curved surface aligned with a flexible tube for supporting the tube and a roller which moves while pressing (squeezing) the flexible tube is driven with a DC motor. To keep revolutions always constant, a current PWM control is employed for changing a power applied to the motor according to load fluctuations, and a phase of the roller is determined based on the current PWM value to manage a pressure generated by the pump and a discharge rate.
An inkjet printing apparatus using a printing head for ejecting ink and having a pressure generating unit for generating a pressure to perform a processing to move ink by applying the pressure to the printing head, the inkjet printing apparatus comprising:
A method of controlling an inkjet printing apparatus using a printing head capable of ejecting ink and also comprising a pressure generating unit for generating a pressure to perform a processing to move the ink by applying the pressure to the printing head and a DC motor as a driving source for the pressure generating unit, the method comprising the steps of:
Dependencies are inferred from the claim text.