Table of Contents
Advertisement
SINGLE ORDER
(cont)
LINES/INCH 6-8
RIBBON NORM/ CHGE
SECTION VI.
TYPE 122 PRINTER
3.
The STOP switch on the printer main control
panel must have been pressed; and
4.
The START switch on the printer must not
have been pressed.
Each time this switch is momentarily activated, the
printer control accepts one PDT instruction from the
central processor for a single line of print.
This con-
trol allows the operator to print a line for inspection
before the program is begun and, during program oper-
ation, allows the operator to print down to the end of
the form, if desired.
When the last form is reached and the form comes out
of the bottom tractor, the printer logically stops and
the FORMS indicator on the main control panel is il-
luminated.
If the operator should now desire to print
down to the very end of the form, he can activate the
SINGLE ORDER toggle switch.
The only state under
which the single -order function is not operative
(besides the four conditions outlined above) is when the
out-of-paper condition and the head-of-form location
on the vertical format control tape are sensed simulta-
neously.
It is not possible to print to the end of the
form using the toggle switch and then advance the
tractors to the head-of-form position and continue
printing, because the printer is now completely out of
paper and synchronization with the program is lost.
To avoid this situation, the SINGLE ORDER switch is
automatically deactivated when the operator has printed
the last line and the tractors are advanced to the head-
of-form position.
To reload the printer with paper and continue, it is
only necessary to put the form in the proper position
in the tractors right where they stopped and perform
the necessary restart procedures.
This control is a lever-lock toggle switch which is used
to select either six- or eight lines per inch vertical
spacing.
The setting of this switch should not be changed
while the type roll is running; otherwise, a possible
malfunction of the printer may result.
A change in the
format control tape may be required when the setting of
this switch is changed.
This control is an alternate-action switch which is used
in changing the ribbon.
When the CHGE position is
selected, the ribbon is forced to run in the direction of
the end of ribbon (as long as power is applied to the
printer) until the end is reached, regardless of whether
or not printing is occurring.
It should be noted that
printing can occur during this period, and the time to
reach the end of the ribbon is the same whether or not
printing occurs.
When the end of ribbon is reached,
the RIBBON indicator on the main control panel is il-
luminated, and the printer comes to a "controlled
stop, " as described above under the STOP switch.
6-9
Advertisement
Table of Contents
