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,
U >OO"'~>UI~)
(I/(,lJO)f!Ii~~1t!')
Z.J
fJ'1""
""4/~~~"'7/"'.~'O»~:JI'»~'
~
( 2
f'\cl
Col~n)
When the HOME signal falls
down.
the CPU starts counting the number of dot pulses
until the DOT signal stays LOW for long (about
1.
9 ms). The CPU uses the counted
number to compare with the number "stored at the initialization in order to
decide when to start printing correctly. The HOME and DOT signals can be checked
through test pins (TPl,TP2).
(3)
Recovery motion
Hc(PJ/,)
HOHE (P 102)
~}=4C(f8/11 )
(
·
•
·
·
I
Ibout
--.{ 66 ms~
I
Figure 14
The CPU lIakes the
liST
signal HIGH and the
rc
signal LOW after printing a live.
With this. the .ator stops revolving and the head carrier returns to the hoae
position forced by the recovery spring. If a recovery .otion includes a line
feed, the output of LFC signal (P8/l1) follows. While this signal is LOW. the
drivers (P5/ll.l2) are also LOW activating the Ll solenoid for 1inefeed by 1/18
Dnch. After 1inefeed, the CPU waits until the HOME silna1 returns HIGH. When
tPe head carrier returns to the home position and the HOME signal becomes HIGH,
the
C signal is raised to HIGH about 66
lIS
later' ending the recovery .otion
of the head carrier.
16
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