EPSON Stylus Pro 9500 Revision A
Operating Principles Component List & Illustrations 66
2.1.2.3 Head SLID Motor Driver Circuit
The Head SLID Motor vertically adjusts the position of the printhead on the
carriage according to the thickness of the media in the printer. The motor is
driven by the constant current bipolar drive system, and the current supply to
the motor is controlled by the PWM current control system. The 4-phase 48-
pole PM pulse motor is used for the drive motor, and it is driven by the W1-2
phase excitation.
Based on the preset data received from the IC20, the motor driver IC (IC31)
determines the current level to be output to the motor, and the motor is driven
by the drive phase switching signal which is input into the Pin 25/18.
Figure 2-23. HD_SLID Motor driver circuit
2.1.2.4 Pump Motor Driver Circuit
The 4-phase 200-pole HB stepping motor is used to enable the ink system to
conduct ink absorption. The basic control method and the circuit configuration
are the same as those of the Head SLID Motor Driver Circuit.
Figure 2-24. Pump Motor driver circuit
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