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4.5.4 Input/Output Lines (285 Ipm)
A
=
From attachment
P
=
From printer
POR/Printer Reset (A)
POR/printer reset line is initiated during the
power up sequence to reset the printer circuits
to their starting condition. It is also activated
if a carriage sync check is detected.
Close (+24V) Contaetor (A)
Close contactor line must be activated to switch
the +24 voltage into the printer. This line is
deactivated when a hammer parity check is
sensed to protect the hammer coils.
Belt Go (A)
Belt go I ine is activated to start the belt oscillator.
The belt oscillator furnishes pulses to run the
type belt drive circuits.
ZZ571
POR/Printer Reset
Belt Motion (P)
The belt motion signal is active when the type
belt reaches operating speed. It becomes inac-
tive when the belt speed decreases to approxi-
mately 10% below the operating speed. The
home pulse and the subscan pulses become
active when the belt is up to speed.
PSS (Subsean) (P)
The PSS pulses are generated from the raised
timing marks on the type belt. The subscan
pulses synchronize the print controls between
the attachment and the printer. When the
home pulse is detected, a dummy pulse is gen-
erated because of the missing timing mark.
500 ms
14
min
ZZ583
Close (24V) Contractor
ZZ571
Belt Go
4-92
-IMPSS (Impression Singleshot) (P)
IMPSS is added to the hammer fire pulse to con-
trol the time the hammers are fired for different
forms thickness. This signal is activated when
the subscan pulse goes inactive (halfway into a
subscan) and remains active 140
J.1s
to 423
J.1S
depending on the setting of the forms thickness
control.
Fire Hammer (A)
Fire hammer lines are activated to fire the corre-
sponding print hammers (fire hammer 1
=
print
hammer 1, etc).
ZZ581
Belt Motion
1"'~---1
.Os max
------i.~1
__________________________ -i'--------------------------
ZZ581
PSS (subscan)
D0200 Subscan 1
______________________________
~r_l
___________________ _
D0200 Subscan 2
__________________________________
~r_1
_______________ _
ZZ581
IMPSS (impression singleshot)
1-423J.1s
DROll Fire Hammer (1-66)
------------------..-..-..--------------------------------~I
_I~
____________ _
DR02l
Fire Hammer (3-63)
I
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