Intermec ColorCoder V4 – Service Manual Ed. 1
28
Chapter 2 Operation and Timing
2.1 Basic Operation, cont'd.
2.1:J Motor Control
Table 2-2
Outline
The printer has two 2 phase stepping motors in the PHS unit, a 5
phase stepping motor in the feeder unit, and a DC motor each in the
ink supply system and the roll unit. See Figures 2-11 through 2-13.
for the circuits that control each motor.
See Table 2-2 for the name of each motor and its function.
The feeder motor and the pump motor are controlled by the motor
driver and the gate array (Q348) in the engine 1 PCB. The head
motor and cap motor in the PHS are controlled by the motor driver
and the gate array (Q401) in the engine 2 PCB. These main function
is as follows.
• Controls the motor ON and OFF
• Controls the direction of motor rotation
• Controls the speed of motor rotation
Three fan motors are started and stopped by Q401 via the transistor
(Q421).
Start and stop, and rotating direction of the roll motor in the roll unit
is controlled by the gate array (Q32) in the formatter PCB and the
motor driver in the roll PCB.
The feed amount of the paper is detected by the roll sensor while the
roll motor is on, and by feeding the output signal back to the motor
driver via the detection circuit, the motor is controlled on and off so
that a proper amount of the paper is always fed.
Motor
Function
Feeder motor (M1)
Drives feeder belt
Head motor (M3)
Moves head unit up and down
Cap motor (M4)
Drives recovery unit
Pump motor (M2)
Drives suction pump, pressure pump,
and recovery pump
Roll motor (M5)
Drives roll drive shaft
Fan motors (FM1–3)
Cools head while its temperature is in-
creasing
