Epson LQ-570e - Main Circuits

EPSON LQ-580 Revision C
O
perating Principles
C
ircuit Operation
5
4
2.3.3.2 Main Circuits
o CR Motor Circuit
The CR motor drive circuit is shown below (Refer to Appendix - Cuicirt Diagram in detail).
Figure 2-6. CR Motor Drive Circuit
The CR motor circuit specifications are shown in the table below.
Table 2-7.
Items Specification
Drive voltage +35V± 6%
Driving method Rated current uni-polar drive
Driving IC SLA7024M
Excitation method 2-2 phase / 1-2 phase (orthogon) /W1-2 phase (orthogon)
Reset output
Phase switching SW (G/A output) all High
(Output current is blocked by simultaneous ON protection circuit.)
Phase switching
Generate driving IC control signal by G/A based on trigger signal
(CPU output) and output.
Current value setting Set by CPU D/A (2ch) converter. Setting:5
Current detection
resistance
1Ω ± 2% 3W
Current preciseness All setting current: less than ± 10% (after adjustment)
Table 2-7.
Items Specification