(2)
Encoder disk
In the operation of the spacing motor, the PHASE-A and PHASE-B signals are generated. When
the encoder disk interrupts the photo sensor.
The motor control
LSI
(911: MSM6990) divides these edge pulse signals in accordance with the
print pitch, and sends the IPT signal to provide dot-on
timmg
and carriage position detection
timing.
SP-u
SP-v
SP-w
PHASE-A
(-1
ru-----l
(1
j--L
(I)
UTILITY MODE
IPT
(10,
12,
CPI)
IPT
p;)
17.1.20
(1)
LQMODE
IPT
-
(10.12, 15,
11360”
17.1.2OCPI)
3-a
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