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MODEL B4
CUSTOMER ENGINEERING
Figure 43. Take-up Tension Adiustments
To measure the tension of the direct drive take-up
mechanism, insert the 5" square shank screwdriver in
the empty take-up spool as shown (Figure 43). The
end of the blade should be flush with the edge of
the spool. With the machine turned on, the handle
of the screwdriver will remain horizontal
if
the
tension is correct. Check to be certain that the take-
up spool is free to move vertically. Too much loose-
ness in the retaining lugs may result in noise. This
can be overcome by forming the lugs inward toward
the magazine plate.
5. CAM CLEARANCE. Refer to "Ribbon, adjust-
ment 1, Model Bl".
6. CAM RELEASE LINK. Refer to "Ribbon. adjust-
ment 2, Model Bl".
7. CAM LINK. Refer to "Ribbon. adjustment 3,
Model Bl".
8. PROPORTIONAL RIBBON FEED. Check this by
typing twenty 3-unit or 5-unit characters. The ribbon
should feed an equivalent of 23 plus 2 minus 0 of
these same characters.
9. SELECTOR BAR LINK. Adjust so that the lower
ribbon feed arm will drop off the selector lever when
a 4 or 5-unit typebar has completed one-third to
one-half of its travel toward the platen (Figure 44).
(
10. FIVE-UNIT FEED. Adjust by means of the upper (
adjusting arm. Moving the arm toward the shaft
will increase the amount of feed, and away from the
shaft will decrease the amount of feed (Figure 44).
36
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