Canon BJ-W3000 Service Manual page 116

b. Control of rotation direction
The output timing of the motor drive pulses (XMA, XMAN, XMB, XMBN) from the paper
feed motor driver is controlled by the paper feed motor driver control signals (MTP 4 to 7)
output by the CPU to the paper feed motor driver, in order to control the rotation direction of the
paper feed motor (M1).
c. Control of rotation speed
By changing the frequency of the paper feed motor current control signals (MTP 1 to 3)
output by the CPU to the paper feed motor driver and the paper feed motor driver control signals
(MTP 4 to 7), the rotation speed of the paper feed motor (M1) is controlled.
d. Supply current control
By changing the combination of 2 signals (Vref 1, Vref 2) output from the current control
circuit by the paper feed motor drive control signal (D/A 0) output from the CPU, the current
output from the paper feed motor driver to the paper feed motor is set up for stopping, holding,
low speed rotation and high speed rotation. The paper feed motor supply current is changed
according to the rotation condition of the paper feed motor for smooth rotation.
CHAPTER 2. BASIC OPERATION
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