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- 7-
(B-138)
VERTICAL RIBBON FEED SHAFT SPRING TENSION ADJUSTMENT (Figure
9)
Move the ribbon feed shaft to the right, thus disengaging its gear
from the gear on the left vertical feed shaft. Hook an
8
oz. scale onto the
pin on the left ribbon spool shaft
and
pull in a horizontal dir ection. It
should require 2 to Jrl/2 ozs. to start the shaft revolving. Move the ribbon
feed shaft to the left and,
in
the same manner, check t he spring tension of the
right vertical ribbon feed shaft.
To adjust , position the collars on the
vertical feed shafts (Figure
8), by
means of their set screws.
RIBBON REVERSE SHAFTS ADJUSTMENTS (Figure 10)
See Note (A)
There should be
.040n
to
.06011
clearance between the bottoms of the
ri bbon spool cups
and
the upper ends of the ribbon reverse shafts when the
ribbon reverse arms are held up against the ribbon spool brackets.
(A) To adjust typing umts not equipped with ribbon yield mechanism,
loosen the set screw of the left ribbon reverse arm,
and it
necess ar,y,
the set screws of the collars and the
link
of the left ribbon reverse
shaft.
Position the shaft while holding the ribbon reverse arm up
against the ribbon spool bracket
and
then tighten the ribbon reverse
(B)
arm set screw. Adjust the right ribbon reverse shaft in the same
manner.
(See Figure lOA).
To adjust typing units equipped with the ribbon yield mechanism,
loosen the set screw of the spring block on the left ribbon reverse
shaft,
and ,
if necessar,y, the set screws of the ribbon reverse shaft
collar and
link.
Position the shaft while holding the ribbon reverse
arm against the ribbon spool bracket and the spring block up against
the reverse
arm.
Then tighten the spring blo ck set screw.
Adjust
the right ribbon reverse shaft
in
the same
mann
er.
(See Figure lOB).
RIBBON REVmSE SHAF TS COLLARS ADJUSTMENT (Figure lOA)*
The ribbon reverse shafts should have some end plq, not more than
.008•,
and t�e ribbon reverse shaft collars should be positioned to provide
1/4''
to
5/16"
between the centers of the set screws and the edges of their
respective ribbon spool brackets.
To adjust, position the collars by means of
their set screws while holding both ribbon reverse arms forward against their
stops.
RIBBON REVmSE SHAFTS LINKS ADJUSTMENT (Figure
11)
See Note (A)
The ribbon reverse bail should clear both left
and
right ribbon
reverse pawls
by .015"
to
.040''
when the pull bar bail is in its extreme rear
position and both the left and right ribbon reverse arms are held forward against
their stops. When checking the
.015"
clearance between either ribbon reverse
pawl and the ribbon
reverse ball,
the pllzy' in the ribbon reverse ball should
be taken up in a direction to make the clearance a
minimum.
When checking tor
(A)
*
*
*
*
These requirements should be checked with the type bar carriage
removed.
Omit when unit is equipped with yield mechanism.
