Velocity correction device and velocity correction method in image forming apparatus

• Main Author: OOHARA SHUNICHI
• Format: Patent
• Language: English
• Published: 08.06.2010
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

A velocity correction device of an image forming apparatus capable of obtaining a high-quality image. The image forming apparatus includes a rotor, a motor, a motor control unit, and a velocity command memory. The velocity correction device includes a velocity measuring unit, an arithmetic unit, and an interface unit. The velocity correction device is attached to the image forming apparatus. The velocity measuring unit measures the rotational velocity of the rotor when the motor is rotating at a reference rotational velocity which is a fixed velocity. The arithmetic unit compares the measured velocity with a no-velocity-fluctuation velocity of the rotor calculated by the reference rotational velocity of the motor, extracts a velocity fluctuation component of the rotor, and generates the velocity command data to cancel the extracted velocity fluctuation component. The generated velocity command data are transmitted to the velocity command memory through the interface unit, and stored therein.