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Link Operating
Lever
Ribbon Feed
Drive Link
Figure 4-10. Ribbon Feed Stroke
Pawl Controlling Stud.
Ribbon Feed
Drive Link
Ribbon Feed Pawl
,
3 1/2 Teeth
--~
l::' m ately
1/4 Tooth
4. 6. 4 Ribbon Spool and Pulley Pivot Adjustment
Adjust the ribbon so that the ribbon rides in the
center of the pulleys when feeding. Use Figure 4-13
as reference in making adjustments. Note that' Fig-
ure 4-13 shows the old and new style of ribbon feeds.
Ribbon Reverse Lever
Ribbon Feed
Drive Link
Ribbon Feed
Operating Arm
Figure 4-11. Ribbon Feed - Right Hand
Adjustments for both styles are shown in the boxes
below the drawings. When one ribbon pulley is
adjusted it may be necessary to adjust the pulley on
the other end; then recheck the original pulley. Al-
ways check the ribbon in both directions and on
both ends.
4. 7 CARRIAGE
4. 7. 1 General Information
Worm Drive Gear: The porous bronze worm wheel
contains a reservoir which should be filled with IBM
6 oil through a hole in the worm wheel disk at six-
month intervals.
Printing Registration: It is imperative that the car-
riage frame and platen be kept as rigid as possible to
prevent uneven printing. Check for looseness in the
carriage indicating that the locating blocks and gibs
should be adjusted.
1132 FEMM ( 4/67)
4-11
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