TO ADJUST THE POSITION OF
THE UPPER LOOPER
CORRECT SETTING:
WHEN THE UPPER LOOPER IS ATTHE LEFTMOST POSITION, THE DISTANCE BETWEEN THE
CENTER OF NEEDLE ON THE RIGHT AND THE CENTER OF LOOPER EYE SHOULD BE 4.8 TO 5.2
MM.
TO ADJUST:
1. REMOVE THE MACHINE BASE.
2. LOOSEN THE HEXAGONAL SOCKET SCREWS (A), AND ADJUST THE DISTANCE BETWEEN
UPPER LOOPER SHAFT GUIDE AND BOTTOM OF UPPER LOOPER. THE DISTANCE SHOULD BE
1.6T0 1.8 MM WHEN THE UPPER LOOPER ISATTHE LOWEST POSITION AS SHOWN IN FIG. 1.
3. TIGHTEN THE HEXAGONAL SOCKET SCREWS (A).
4. TURN THE HANDWHEEL AND BRING THE UPPER LOOPER TO THE LEFTMOST POSITION.
5. LOOSEN THE HEXAGONAL SOCKET SCREW (B), AND ADJUSTTHE DISTANCE BETWEEN THE
CENTER OF NEEDLE AND CENTER OF UPPER LOOPER EYE AS SHOWN IN FIG. 2 AND FIG. 3.
6. TIGHTEN THE HEXAGONAL SOCKET SCREW (B).
7. CHECK THE UPPER AND LOWER LOOPER TIMING AND THE CLEARANCE BETWEEN UPPER
AND LOWER LOOPERS.
1.7 MM
.UPPER LOOPER
1.6TO
jjNEEDLE ON THE
RIGHT
5 MM
UPPER LOOPER SHAFT GUIDEI
4.8 TO 5.2 MM
(FIG. 2)
UPPER LOOPER SHAFT
HEXAGONAL SOCKET
UPPER LOOPER SCREW (B)
HEXAGONAL SOCKET SCREWS_
(FIG. 1) (FIG. 3)
19
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