Epson AcuLaser C8500, Service Manual

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EPSON AcuLaser C8500 Revision C
APPENDIX Wiring Diagrams and Signal Information 7-42
†
ROTARY MOTOR ASSY description.
„
Motor type: Hybrid stepping motor
„
Direction of rotation:Clockwise direction (as viewed from rear of
printer)
„
Step angle:1.8 ° ° ° ° ± 0.18 ° ° ° °
„
Winding resistance:0.9 - 0.95 ± 10% (25
o oo o
C CC C )
„
Excitation sequence : See the following table.
„
Rotation/hold according to signal
Table 7-9. Signal Description - § § § § 5
Signal line Description
ROTARY MOTOR
HOLD(L) 5VDC
Hold current control signal of ROTARY MOTOR ASSY.
ROTARY MOTOR ON(L)
5VDC
Drive power on/off signal for ROTARY MOTOR ASSY.
ROTARY MOTOR CLOCK Clock signal for ROTARY MOTOR ASSY.
A, /A, B, /B Excitation signal for ROTARY MOTOR ASSY.
Table 7-10. Excitation Sequence
Phase
Steps (2-phase excitation)
1 2 3 4 5 6 7 8
Phase B * * * *
/B * * * *
A * * * *
Phase/A * * * *
Table 7-11. Rotation/Hold According to Signal
ROTARY MOTOR
ON(L) 5VDC
ROTARY MOTOR
HOLD(L) 5VDC
Status
Low High
ROTARY MOTOR ASSY ready
for rotation. (Actual rotation is in
accordance with ROTARY
MOTOR clock.)
Low Low ROTARY MOTOR ASSY on hold.
High Low or High
ROTARY MOTOR ASSY neither
turns nor on hold.