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4.1.4 Input/Output Lines
(50, 100, and 155 Ipm)
A
=
From attachment
P
=
From printer
. POR/Printer Reset (A)
POR/printer reset line is initiated during the
power IIp sequence to reset the printer circuits
to their starting condition. It is also activated
if a carriage sync check is detected.
Close (+24V) Contactor (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 line is activated to start the belt oscillator.
The belt oscillator furnishes pulses to run the
type belt drive circuits.
ZZ570
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 b:!It speed decreases to approxi-
mately 10% bel
'JW
the operating speed. The
home pulse and the subscan pulses become
active when the belt is up to speed.
PSS (Subscan) (P)
The PSS pulses :Ire 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 d(!tected, a dummy pulse is gen-
erated because of the missing timing mark.
500 ms
~
I
4-12
I~PSS
(I
mpression 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 235 Ils to 435 Ils
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).
" min
~r-----------------------------------------
ZZ582
Close (24V) Contractor
ZZ570
Belt Go
_____ . . . . . r-
/----1.0s
max---~~rl
_ _ _ - - - - - - - - - - - - - -
I
ZZ58
Belt Motion
ZZ580
PSS (subscan)
DO 200 Subscan 1
_________________ . __________________
~r_1~
__________________ __
DO 200 Subscan 2
____________________________ .-.. ____
~r_1
_______________ _
ZZ580
IMPSS (impression singleshot)
DH 010 Fire Hammer (1-66)
DR 020 Fire Hammer (2-62)
I
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