Manual Controls, Left Side - IBM 1800 Operating Procedures Manual

The Start Key, when pressed, places the 1443 in ready
status providing the following conditions are met:
1. Ac an d dc power are on .
2. Form guide plates are closed.
3. Typebar is in position.
4. Typebar removal switch is set to ON.
5. Carriage brush assembly is closed.
6. Six-to-eight line drive cover closed.
7 . End-of-form switch not actuated.
8. No error condition exists.
The Stop Key, when pressed , removes the printer from
ready status and turns off the ready light. If a p rint or
control operation is already in progress , it is completed.
If a print or control operation is not in progress , all
further action is preven ted un til START is pressed.
The Carriage R estore Key is effective only when the
ready light is off. Pressing this key causes the carriage
to advance to the next channel-l punch in the control
tape.
If the
carriage clutch is disengaged , the form
does not move.
The Carriage Space Key is effective only when the
ready light is off. Pressing this key causes the carriage
to advance one line space. If the carriage clutch is
disengaged, the form does not move .
The R eset Key, when pressed, causes all printer check
circuit indicators to be reset.
The Carriage Stop Key,
when pressed , stops carriage
operation and turns off the ready light. Do not press
CARRIAGE STOP to stop printer operations; upon
restarting , overprinting may occur.
The Ty pebar Motor Switch is located under the top
cover and behind the operator panel. This switch is
turned to ON for normal operation. With the switch
at OFF, the ribbon motor, typebar motor , and ready
light are turned off; however, ribbon and typebar con-
trol circuits remain active. With the switch at TYPEBAR
REMOVAL , the ribbon motor, type bar motor, and
ready light are turned off. Ribbon and typebar control
circuits are also turn ed off to permit type bar removal.
Use this position when removing or installing a typebar.
Do not turn this switch to OFF or TYPEBAR
REMOVAL while the typebar is in motion .
The Typebar Selector Switch is located under the top
cover behind the operator panel. This switch has
four positions (13, 39, 52 , and 63) and is used to
select the character bar being used. The switch must
be set to the position indicating the typebar being used
or a sync check occurs .
This switch is installed only if the selective character
feature is installed.
MANUAL CONTROLS, LEFT SIDE (Figure 14)
Figure 14. 1443 Man ual Controls, Left Side
40
IBM 1800 Operating Procedures
Th e Paper Brake Control is used to maintain a horizontal
print line by providing drag on the forms. The control
has 11 positions: 0 through 5 in half-step increments.
The higher positions increase the amount of drag exerted
on the forms. Excessive pressure results in tearing the
forms. Too little pressure results in a wavy print line or
unequal spacing.
Suggested paper brake settings are:
Parts Per Form
1
2
4
6
Setting
1-1/2 or 2
1-1/20r2
2-1/2 or 3
2-1/2 or 3
The Carriage- Tape Idler Locking Knob is used to remove
excess slack from control tapes up to 132 lines in length.
The Platen Positioning Knob is used to compensate for
differen t thickness of forms by adjusting the platen toward
or away from the typebar. Si xteen positions are provided