Image forming apparatus and control apparatus

摘要

The present image forming apparatus includes a first control unit and a second control unit driven by built-in clock oscillators to realize the distributed control. The first control unit generates, using a first timer driven by the built-in clock oscillator of the first control unit, a pulse signal corresponding to a predetermined clock rate and outputs the pulse signal to the second control unit. The second control unit measures, using a second timer driven by the built-in clock oscillator of the second control unit, a pulse width of the pulse signal outputted from the first control unit, and calculates a correction coefficient using reference pulse width corresponding to the predetermined clock rate and the measured pulse width. The processing unit processes using the calculated correction coefficient.

主权项

1. An image forming apparatus comprising:
a first control unit driven by a first clock oscillator; and a second control unit driven by a second clock oscillator, said first control unit comprising a signal transmitting unit that generates, using a first timer driven by the first clock oscillator, a pulse signal in accordance with a predetermined clock rate, and that transmits the generated pulse signal to said second control unit, and a start notification unit that notifies said second control unit of a start of a clock correction process for calculating the correction coefficient, said second control unit comprising:
a signal receiving unit that receives the pulse signal transmitted by said signal transmitting unit;a measurement unit that measures, using a second timer driven by the second clock oscillator, a pulse width of the pulse signal received by said signal receiving unit;a calculation unit that calculates a correction coefficient using a reference pulse width corresponding to the predetermined clock rate and the measurement pulse width;an execution unit that executes image formation using the calculated correction coefficient; anda start response unit that transmits information indicating whether the clock correction process can be started to said first control unit in response to receiving the start notification, wherein said signal transmitting unit transmits the generated pulse signal to said second control unit in response to receiving the information transmitted from said second control unit, the information indicating that the clock correction process can be started.