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REV.-A
2.4.2.5 Carriage Position Control
The encoder output functions in the DCU to detect velocity and provide positional data by detecting
900 of the phase difference (carriage rotational direction) and rotation counts. Position counting is
based on home position signal recognition. A stop signal is generated upon detection of positional count
suspension. Figure 2-55 shows a wave pattern the motor is driven at constant speed. Note that the pulse
signal is constant with the 900 phase lag.
The reverse phase difference is observed if the motor is driven in the opposite direction. During
acceleration or deceleration of the motor, the pulse cycle is not constant. Figure 2-56 shows the
relational control positions.
I.....
~
\
I(
\
IOil.....
...
,.-
t
,
l
I
5V
~
V
O·
ms 0·1 ms
Upper wave: ENA signal
Lower wave: ENB signal
Figure 2-55. Encoder Output Wave Form
528 (401)
1--:-.:-::_1J...2 . 8
..
345.44 (203.2)
46.5
10(Reflesh Area)
Print Area
I
19.33
7.17
I
463.7(336.7)
37.13
f---
68
1
---"'-"-- 85. 63
12i
n
16
0
2
,
0
I
'"
' "
( f\
' "
0
"
m
I
::J
a.
0°
~
~
0
F
-31
::::::!t-
;b"'"
~~
o~1
::l~.
(
)-----80 Colum
MIC
gl
2
~
o
3
' "
Figure 2-56. Control Positions
2-51
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