Table of Contents
Advertisement
Misc. motors
Each of the following motors is provided with a rotating speed sensing encoder
(which generates a pulse train in accordance with the speed of a slotted disc rotating
between a light emitter and a light receptor):
Drum motor
Main unit feed motor
Cut-sheet paper pickup motor
Cut-sheet paper feed motor
When a motor is turned ON, the pulses generated by the attached encoder are fed
back into the PLL (phase-locked loop) circuit in the driver circuit and are compared
with the oscillation frequency of the reference crystal oscillator. The motor output is
controlled according to the comparison results.
The main unit feed motor speed varies depending on whether the fan-fold paper
mode or optional cut-sheet paper mode is selected (refer to "Paper Transport" on
page 5–24). Therefore, the main unit feed motor encoder has two discs which differ
in the number of slots.
Principles of Operation
MPU
Encoders
5–43
Advertisement
Chapters
Table of Contents
