Epson LQ-570e - Page 55

EPSON LQ-580 Revision C
O
perating Principles
C
ircuit Operation
5
5
o PF Motor Circuit The PF motor drive circuit is shown below (Refer to Appendix - Cuicirt Diagram in detail).
Figure 2-7. PF Motor Drive Circuit
The PF motor circuit specifications are shown in the table below.
Table 2-8.
Control
Signal
Reference
Current
Items Specification
Drive voltage +35V± 6%
Driving method Regular current uni-polar drive
Driving IC SANYO LB1847
Excitation method 2-2 phase / 1-2 phase (orthogon)
Phase switching
Generate driving IC control signal by G/A based on trigger signal
(CPU output) and output.
Current value setting Vref setting by dividing resistance Setting: 2
Current detection
resistance
0.82Ω ± 2% 1W
Reset output ENA/ ENB signal (G/A output) both: High (Output current OFF)
Items Specification