REV.-A
2.2.5.6
Printhead
Software Control
During operation at 900 PPS, one print cycle is performed at each phase switching step, so as to meet
the specifications of the
printhead (solenoid drive frequency: 900 Hz).
The drive pulse width is adjusted by using an A/D converter (Figure 2-47) to detect the drive voltage,
and is kept within the area outlined by the oblique lines in Figure 2-47.
Specif icat ion
of Pr inthead
i
II
I
Ii
Head Prive
Pulse
$:q:&J1-n—rL
900PP
I
I
I
I
I
.
I
~
1
Figure 2-46. Print Timing
MZS4
+24V
I
L
,
J
;(
‘
+24V
+5V
43
ZD3
C20
0. l/A
R84
~
MA105
.7
MB2-1
TJ
32
R108
—
C21
1.65~
470
”
33
<
)
CUP
/
L
PD7
(2C)
AVREF
AV
CC
AN5
AV
SS
810HG
+’
#r?,
.*
-..
Figure 2-47. A/D Converter (+24 VDC Line Monitor) Circuit
2-42
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