Ribbon Feed Mechanism (Figure Hi) - Centronics 101A Technical Manual

B.
FORM FEED MECHANISM - HH
RIBBON FEED MECHANISM - HI
e. Maintain a gap of 0.1 to 0.2 mm (0.003 to 0.007-in.)
between the notch of cam (HH-23) and back stopper (HH-74)
(clutch - off condition) by loosening allen-head screws
(HH-24), and adjust cam accordingly.
REFER TO
1. To adjust proper distance of clutch slide pawl (101) to hold
raised tab on paper feed clutch, inner cam (HH-14) prior to
line feed release, perform the following steps:
a. Loosen screws, washers (Fig. 8-9/86, 82) on clutch magnet
frame (HH-96) mounted to paper feed chassis (100).
b. Slide magnet frame on paper feed chassis (100) slots so that
the distance between clutch slide pawl (101) and tab on
inner cam (HH-14) is from 0.2 to 0.3 mm (O.007-0.011-in.).
Tighten screws and washers.
C. TIMING BELT (HH-28)(FIG. 8-11)
1. The timing belt (HH-28) located between FF idle gear (HH-27)
and pin feed pulley (HF-14) has the following adjustments:
a. Loosen three nuts (HH-70) holding right FF chassis (100)
to left frame chassis (HE-86). (Rotate left frame to
change tension on belt).
b. For proper tension of timing belt (HH-28) move belt down-
ward 3-5 millimeters (0.118-0.197-inch) when load of
100 grams (3.5 ounces) is applied on belt at mid-point be-
tween both pulleys.
c.' Tighten three support nuts (HH-70) at right FF chassis
(100) when proper tension has been applied.
5.2.10 RIBBON FEED MECHANISM (FIGURE HI)
5.2.10.1 Operation
A. RIBBON MOVEMENT - FORWARD CLUTCH DRIVE
Torque for feeding ribbon is transmitted while head is moving from
left to right as clutch spring (HI-4) engages sleeve (HI-5) mounted
on shaft (HB-50). Torque is transmitted to ribbon as follows:
5-35
REV.
J.