Rf Motor Driver Circuit; Table 2-6. Pf Motor Specifications; Figure 2-28. Rf Motor Driver Circuit - Epson C117001-N - DFX 5000+ B/W Dot-matrix Printer Service Manual

Specification
Form
Supply voltage
Internal coil resistance
Frequency
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Current consumption

2.3.6 RF Motor Driver Circuit

Figure 2-28 shows a block diagram of the RF motor driver circuit, and Table 2-7 provides the RF
motor specifications. The RF motor is a stepping motor. The control circuit perlbrms open-loop
phase switching control according to the timing data for acceleration mnstant speed, and
deceleration. CPU ports PG1O to PG13 output the motor phase switching signals. The control
method is not equipped with a hold circuit for changing the motor phase. 'The RF motor rotates
when the carriage moves.
Specification
Form
Supply voltage
Internal coil resistance
Frequency
Driving method
Rev. A

Table 2-6. PF Motor Specifications

4-phase, 200-pole, HB* pulse motor
4274 pps~ (normal mode, constant driving): 9.9 ipe""
2610 pps (middle speed mode, constant driving): 6 ips
Driving: 1.95 Aj 0.20A per phase (average)
Holding: 0.26 A, 0.02A per phase (average)
PG 11 "
PG 13

Figure 2-28. RF Motor Driver Circuit

Table 2-7. RF Motor Specifications
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4-phase, 46-poie, PM pulse motor
35 VDC * 6% (apptied to the driver circuit)
150 Q f 13 Q per phase at 25°C (77°F)
Driving: 0.10 A (average)
7 2 0
! " s ~
Constant voltage driving, 2-2 phase drive only
circuit)
,
PNP
Transistor x4
Description
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2-31