Table of Contents
Advertisement
~
2. Provide freedom of movement.
a. Loosen the screws in the upper ribbon casting
mounting gib.
b. Position the gib for a minimum clearance (0.003")
to the ribbon casting without binding the casting as
the unit is moved throughout its lateral range.
c. Tighten the screws in the gib.
Adjust Ribbon Skew
1. First insure that the ribbon drive unit
a. is adjusted correctly.
b. is located correctly.
2. To adjust for the ribbon to skew to the left when
slightly unwinding from the upper spool, loosen the nut
on the left hand ribbon spool center and push the shaft to
the rear.
3. Adjust the angle of the correction roller on the cor-
rection arm (if adjustable) so that the ribbon
a. corrects to the right.
b. winds onto the upper spool with the best right
edge alignment.
4. The eccentric in the ribbon skew wheel should be
adjusted to assure clearance between the wheel and the
ribbon when the skew lever is in the latched position.
Adjust Ribbon Shield and Print Line Indicator
1. Prepare to adjust ribbon shield assembly.
a. Open the T-casting.
b. Remove the ribbon.
c. Set the print impression control lever to E.
2. Check the adjustment of the ribbon shield and print
line indicator for the following:
a. that the key on the ribbon shield bracket enters
freely into the slot in the right end of the movable
base.
b. that the left end of the ribbon shield bracket
enters freely into the slot in the left end of the
movable base.
c. that the ribbon shield is parallel to the top surface
of the movable base within 0.005".
d. that the inner surface of the ribbon shield is within
0.005" to 0.008" of the lower cartridge ribbon guide
at both ends.
e. that the double-headed screw has a clearance be-
tween the rear side of the inner head and front of the
ribbon shield extension of 0.004" to 0.006".
f. that when the T-casting is being closed, the key
slot on the left end of the ribbon shield permits free
entry of the key on the translator frame.
3. If the conditions as stated in step 2 are met, no
further adjustment is necessary. Proceed to step 9.
4. Position the ribbon shield bracket.
a. Loosen the collars on the T-casting hinge pin.
b. Position the ribbon shield bracket so that the key
on the ribbon shield bracket enters freely into the slot
in the right end movable base.
c. Tighten the collars on the T-casting hinge pin.
5. Position ribbon shield vertically.
a. Loosen the screws in the ribbon shield support.
b. Position the ribbon shield so that the key on the
left end of the ribbon shield enters freely into the
slot in the left end of the movable base.
c. Tighten the screws in the ribbon shield support.
6. Position the ribbon shield horizontally for a clear-
ance of 0.005" to 0.008" to the cartridge lower ribbon
guide.
a. Turn the two set screws in the ribbon shield
bracket at the right end of the movable base.
b. Turn the set screw in the key slot at the left end
of the movable base.
7. Position the double-headed screw,
a. with the ribbon shield set as in step 6.
b. for a clearance between the rear side of the inner
head and the front face of the ribbon shield extension.
(1) at the right end of the movable base.
(2) of 0.004" to 0.006".
(3) by turning the screw.
c. Lock the screw in place.
8. Position the key slot on the left end of ribbon shield.
a. Loosen the key slot block mounting screws.
b. Position the ribbon shield in the movable base.
c. Lift the key slot block with the left middle finger,
keeping the thumb on the type array and reaching
around the left end of the T-casting.
d. Carefully close the T-casting while aligning the
slot block to the key.
e. Lock the T-casting closed.
f. Tighten the upper slot block mounting screw.
g. Open the T-casting.
h. Tighten the lower slot block mounting screw.
9. Replace the ribbon.
Lower Ribbon and Brake Assembly Removal
(Figure 8)
1. Remove the cover over the ribbon assembly.
2. Remove the ribbon.
3. Remove the cover over the lower ribbon drive.
4. Move the ribbon drive unit to the left.
5. Remove the retaining clip from the ribbon spindle
shaft.
6. Remove the ribbon spindle shaft.
CAUTION:
Do not
lose the key.
7. Remove the retaining clip from the drive gear shaft.
8. Remove the ribbon drive and brake assembly.
9. Re-assemble in reverse order.
a. Be certain the key is in the ribbon spindle shaft.
b. As the ribbon drive and brake assembly is installed,
the reverse drag pawl must be lifted to engage the
reverse drag friction ring.
c. Check the reverse drag pawl by turning the
spindle. The upper pawl should ratchet when the
upper spindle is turned in a counterclockwise direc-
tion when viewed from the spindle end. The lower
pawl should ratchet when the lower spindle is turned
in a clockwise direction when viewed from the
spindle end.
Upper Ribbon Drive and Brake Assembly Removal
(Figure 8)
1. Remove the cover over the ribbon assembly.
2. Remove the ribbon.
3. Remove the ribbon motor drive gear cover.
4. Remove the sense arm spring.
5. Remove the retaining clip to free the sense arm.
6. Remove the sense arm assembly.
7. Remove the cover over the upper ribbon drive.
8. Move the ribbon drive unit to the left.
CAUTION:
Nylon friction disk will probably drop as the
cover and spider spring assembly are removed. Remove the
disk.
9. Remove the retaining clip from the ribbon spindle
shaft.
10. Remove the ribbon spindle shaft.
CAUTION:
Do not
lose the key.
11. Remove the horseshoe clip from the drive gear shaft.
12. Remove the ribbon drive and brake assembly.
13. Re-assemble in reverse order.
a. Be certain the key is in the ribbon spindle shaft.
b. As the ribbon drive and brake assembly is installed,
the reverse drag pawl must be lifted to engage the
reverse drag friction ring.
c. As the upper ribbon drive cover is installed, the
nylon friction disk must be held in position and the
spider spring must engage it properly.
d. Check the reverse drag pawl by turning the
spindle. The upper pawl should ratchet when the
upper spindle is turned in a counterclockwise direc-
tion when viewed from the spindle end. The lower
pawl should ratchet when the lower spindle is turned
in a clockwise direction when viewed from the
spindle end.
Disassemble Ribbon Drive and Brake Assembly
(Figure
8)
1. After the removal of the drive and brake assembly,
stand the assembly up with the compression plate on top.
2. While holding the compression plates against spring
tension, remove three horseshoe clips.
3. Remove the upper compression plate, taking care not
to lose six compression springs which are now free.
4. Remove the six springs.
5. Remove the lower compression plate.
6. Remove the friction ring.
CAUTION:
Note the direc-
tion of the teeth on the friction ring. The teeth on the
upper drive friction ring are opposite to the teeth on the
lower drive friction ring. Therefore, these rings can be
incorrectly assembled.
7. The friction surfaces of the friction ring, spool driver,
and lower compression plate should be clean and free
from oil.
8. Re-assemble in reverse order.
a. Insure that none of the six compression springs are
lost.
b. Be certain that the friction ring is not installed
backwards. After the assembly is in the machine, the
upper pawl should ratchet when the upper spindle is
turned in a counterclockwise direction when viewed
from the spindle end. The lower pawl should ratchet
when the lower spindle is turned in a clockwise direc-
tion when viewed from the spindle end.
Ribbon Clutch Adjustment - Out of Machine
(Figure 8)
1. Prepare to adjust the ribbon clutch.
a. Remove the cover and the ribbon assembly.
b. Remove the ribbon.
c. Move the ribbon drive unit to the left.
d. Remove the cover over the left side of the lower
ribbon drive.
2. Remove the lower ribbon drive (not necessary for
clutch removal) .
a. Remove the horseshoe clip on the lower ribbon
drive assembly.
b. Remove the lower ribbon drive.
3. Free the ribbon clutch.
a. Remove the horseshoe clip on the ribbon clutch
shaft.
b. Remove the screws in the clutch magnet housing.
c. Remove the clutch magnet housing.
4. Remove the ribbon clutch.
a. Hold the clutch shaft drive gear in the left hand to
prevent it from falling.
b. Remove the ribbon clutch toward the right.
5. Check the adjustment of the ribbon clutch for
a. a clearance between the pinion and the shoulder
on the clutch shaft of 0.001" to 0.004".
NOTE:
Step
5a applies to both tooth-style and friction clutches.
Steps 5b through 8 apply to tooth-style clutches only.
b. a clearance between the clutch armature and the
clutch drive ring of 0.028" to 0.032" when serrations
in the armature are mated with the serrations in the
cylindrical assembly.
c. a minimum clearance between serrations on the
armature and on the cylindrical assembly of 0.003"
when the armature is seated against the drive ring.
6. If conditions stated in step 5 are met, no further ad-
justment is necessary. Proceed to step 9.
7. Position the cylindrical assembly.
a. Seat the ribbon clutch output pinion against the
cylindrical assembly.
b. Position the cylindrical assembly for a clearance
between the pinion and the shoulder on the clutch
shaft of 0.001" to 0.004".
c. Lock the cylindrical assembly to the shaft.
8. Adjust the clutch drive gear assembly for correct en-
gagement ( Figure 8) .
a. Seat the pinion against the cylindrical assembly.
b. Push the armature to engage the serrations.
c. Position the clutch armature drive ring for a clear-
ance to the armature of 0.028" to 0.032". A double set
of screws (four, two in each hole) hold the ring.
d. Tighten the setscrews in the armature ring.
e. Seat the armature against the drive ring.
f. If a clearance between the serrations of the arma-
ture and the cylindrical assembly of 0.003" minimum
does not exist, repeat adjustments from step c.
9. Replace the clutch shaft assembly in the machine,
taking care that the small key stays in the shaft and that
the shaft goes through the output pinion inside the drive
housing. The clutch pinion and the output pinion must en-
gage their gear trains as this reassembly is done. (A light
pin-punch mark in the side of the key will help keep it in
place if it is loose. )
10. Replace the clutch magnet.
11. Replace the horseshoe clip on the clutch shaft.
12. Check the clutch operation under power by manually
operating the reversing arm.
Ribbon Drive Motor Positioning (Figure 8)
1. Position the motor gear.
a. Loosen the clamp screws.
b. Position the gear so that the correction lever arm
and the sense finger arm are operated by the roller on
the gear and so that gear meshes with both clutch
shaft drive gears (0.040" between the motor bushing
and the motor gear) .
c. Tighten the clamp screws.
2. Position the motor.
a. Loosen the motor holding screws.
b. Position the motor to provide a wink of 0.001" to
0.005" between the motor drive gear and the clutch
shaft drive gears at a point of tightest engagement.
24
REMOVALS AND ADJUSTMENTS
25
Advertisement
Table of Contents
