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Locking Screws
Needle Valve
Adjusting Screws
By-Pau
Line Space
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that the hydraulic pumps are not moving. Turn down
on the front left screw until it is closed. Then back off
five full turns on this screw. Tighten the lock screw
(the front right screw).
(2) If nipping is detected, adjust the needle valve
to cause the detent to stop nipping. Turn down on
the front left screw until the detent stops nipping.
Press down on the screwdriver, and feel the play
between the detent arm and the detent stop stud.
Turn down screw gradually until all play disappears.
Tighten the lock screw (the front right screw). Stop
the carriage. After this adjustment has been made, the
bypass needle valve must be adjusted.
Bypass Needle Valve Adjustments
1. First, the following adjustments should be made:
a, the space needle valve.
b. the skip needle valve (on machines with two-speed
carriage).
c. the single shots within the system that pertain to
the carriage.
2. Insure that the following adjustments are correct:
a. the tractors.
b. the tractor drive shafts.
c. the single-shots within the system that pertains to
the carriage.
3. Insure that the emitter brush is just fully made on a
segment of the emitter.
4. Set up the carriage.
a. Place the paper in the carriage.
b. Program for triple space before print.
c. Engage the manual clutch in the 6 lines-per-inch
position.
d. Remove the upper front paper guides.
5. Loosen the lock screw for the bypass needle valve
(the rear right screw, Figure 17).
Fixed Orifice in By-Pass only
Figure 17. Needle Valves
6. Turn in on the bypass needle valve (rear left screw)
until it is closed.
7. Disengage the detent arm by pressing down in the
notch with a large screwdriver.
8. Start the carriage by depressing the start key.
9. Adjust the bypass needle valve as follows:
a. Draw line graphs across the paper while it is
feeding.
(1) Use the jam bar as a guide.
(2) Move the pencil at a rate that will show from
4 to 10 triple spaces on a sheet 11 inches wide.
(3) Too much pencil pressure can cause a drag on
the paper, and, therefore, an erroneous graph.
(4) The resulting graph should be similar to Fig-
ure 18.
b. Turn out on the bypass needle valve until the line
graph just resembles Figure 19. Turn out an addi-
tional Y8 or Ke turn and lock in this position.
c. Tighten the lock screw (the rear right screw).
10. Stop the machine.
11. After this adjustment has been made, the following
must be adjusted:
a. the emitter brush.
b. the single-space single shot.
c. the tape drive sprocket and the carriage brushes.
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Figure 18. Bypass Closed Detent Inoperative
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Figure 19. Bypass Adjusted Correctly
Single-Space Single-Shot Adjustments
1. Insure that no binds exist when you manually turn
the forms advance knob with the 6-8 knob in neutral.
2. Set up the carriage.
a. Check that paper is in the carriage.
b. Check that upper front paper guides are removed.
c. Check that manual clutch is in 6 lines-per-inch
drive position.
d. Program for single space before print.
3. Start the carriage by depressing the start key.
4. Draw line graphs on the paper while it is feeding.
a. Use the jam bar as a guide.
b. Move the pencil at the rate that will show from
4 to 10 single spaces on a sheet 11 inches wide.
c. Too much pencil pressure can cause a drag on the
paper, and, therefore, an erroneous graph.
d. The resulting graph should be similar to Figure 20.
5. Adjust single-space single-shot to produce the desired
result (E2 brush single shot in 1401 system).
Figure 20. Single-Shot Adjusted Correctly
Emitter Brush Adjustments
1. Insure that no binds exist when you manually turn
the forms advance knob with the 6-8 knob in neutral.
2. Set the emitter brushes in the brush holder for a pro-
jection beyond the brush holder of
23'2" ± %4".
3. Set up
the carriage.
a. Check that the paper is in the carriage.
b. Check that the upper front paper guides
are
removed.
c. Check that the manual clutch is in 6 lines-per-inch
drive position.
d. Program for triple space before print.
4. Start the carriage by depressing the start key.
5. Draw line graphs on the paper.
6. Shift the brush assembly until the line graph appears
as shown in Figure 21.
a. There may be a slight overshoot (maximum allow-
able X2") ") on these graphs.
b. Some overthrow may be necessary on triple space
6 lines-per-inch to prevent
excessive pull
-
in
on double
space 8 lines-per-inch.
7. Check brush setting for double space.
a. Set the manual clutch to 8 lines-per-inch drive
position.
b. Program for double space before print.
c. Start carriage and draw line graphs.
8. Re-adjust the brush assembly as required for the best
line graph of
a. double
space 8
lines-per-inch.
b. triple space 6 lines-per-inch.
9. After this adjustment has been made, adjust the tape
drive sprocket and the carriage brushes.
Indicates a brush
out of adjustment
Misadjusiment of a
4
-
brush can cause either
OVERSHOOT
UNDERSHOOT
Figure 21. Emitter Brush Adjusted Correctly
Carriage Tape Brushes (Statically) Adjustments
(Figure 23)
1. Position the tape brushes for 1" +,%2 " -0" projection
from the brush bolder (Figure 22). CAUTION: The range
of adjustment should be held as close as possible because
of possible difficulties in timing"the stop brushes to the El
brush.
PROJECTION FROM BRUSH HOLDER
Figure 22. Carriage Tape Brush Projection
2. Adjust the brush separator collars on the pivot rod so
that the brushes are centered in separator slots and for
minimum end shake of separator.
3. Position the brush holders so that the toe of the
shorter group of strands lines up with the scribed line on
the brush separator when the brushes
are
held even with
the separator.
4. Position
the brush separator eccentric stop stud for
0.050" ± 0.010" clearance between the brush separator
and the contact rolls.
5. Adjust the brush separator rod with brush assembly
open and so that brush tips are below active surface of
separator a minimum of
% 44 r.
6. Align the brush tracking by shifting the tape drive
sprocket on the shaft. NOTE: Do not shift the sprocket in
such a way that the tape rides improperly between the
contact rolls.
7. Position the inner tape guide so that it is below the
active surface of the tape drive sprocket 0.012" ±0.001".
8. Loosen the outer tape guide on
the
latch shaft and
center the guide around the pin feeds in the drive sprocket
(leave loose).
9. Position
the latch block within the limits of its mount-
ing hole for these conditions when latched so that the
a. arc ( cylindrical surface ) of the outer tape guide is
equally divided by the point of contact of the arc and
the drive sprocket.
b. clearance from the bottom face ( side that faces
pawl)
of latch block to upper side of latch pawl is
0.003" to 0.006".
c. clearance from the stud in the separator ( left side)
to the brush frame is approximately 0.005".
This may occur due to
carriage drift.
REMOVALS AND ADJUSTMENTS
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