8
SYNCHRONIZING LOOPER AND NEEDLE MOTIONS (CONTINUED)
Loosen lock nut (F) and TORQUE thrust adjjusting
screw (E) to 6 in. lbs. (7cm/kg); re-tighten lock nut
(F) securely.
With the looper at extreme right end of travel,
check location of the right looper connecting rod
bearing using gauge No. TT35. Place large hole of
gauge over threaded stud (A, Fig. 5). The left end
of gauge should locate against the RIGHT side of
looper rocker cone (B). If adjustment is necessary,
loosen clamp screw (C) and reposition looper
drive lever (D) as required, then tighten screw (C).
If gauge is not available, check setting with a
scale. Distance between the centerline of rocker
cone and centerline of looper drive lever stud
should be 4 1/16 inch (103.2mm) as shown in Fig. 5
when looper is at its extreme right end of travel.
LOOPER AND LOOPER NEEDLE GUARD SETTINGS
Insert a new needle, type and size specified. Looper
gauge is 5/32 inch (4.Omm) which is the distance from
point of looper (A, Fig. 6) to centerline of needle (B)
when looper is at extreme right end of its travel. Looper
gauge No. 21225-5/32 (C) is available for this setting.
Adjustment can be made by loosening nut (D),(it has a
left hand thread) and nut (E); turn connecting rod (F) as
required to attain specified dimension. Hold connecting
rod in position and tighten nut (E), then nut (D). NOTE:
Be sure that the left ball joint is in a vertical position and
does not bind after adjustment.
While turning handwheel in operating direction and the looper (A, Fig. 7) moves to
the left, its point should be set to brush but not pick at rear of needle (B). Adjust-
ment can be made by loosening screw (G, Fig. 6), turn stop screw (H) clockwise to
move looper towards the rear, counterclockwise acts the reverse. It is suggested to
hold looper towards the front while making this adjustment. Tighten screw (G) after
adjustment has been made and recheck movement of looper.
Looper needle guard (attached to looper) should be set with the looper point set to
the centerline of the needle, set front guard 0.005" to 0.010" (0.13 to 0.25 mm) away
from looper.
Fig 5
Fig 6
Fig 7