Adjustmentof Bobbincaseopener - Consew 226R Operating Instructions Manual

ADJUSTMENTOF BOBBINCASEOPENER
(THREAD RELEASE FINGER)
The bobbin case opener facilitates the passage of the needle thread loop by
slightly nudging the bobbin case holder creating a slight rotating movement of
same. This movement at that very instant opens a clearance gap between the
notch on the bobbin case holder and the tab of the hook retainer permitting the
needle thread loop to be drawn easily through the gap.
I) Clearance between the opener and projection of hook (Fig. 20 and 21):
1. Loosen the screw (@, Fig. 20)
2. Adjust the clearance between projection of hook (CD, F ig. 21) and the open-
er (@, Fig. 21) by means of movement of thread releasing shaft bushing
(@, Fig. 20) to the right or to the left as may be required. The standard
clearance between the two parts is 0.8mm as shown Fig. 21.
3. Tighten the screw (@, Fig. 20) securely.
II) Position of the opener cam:
Place the one of screws (@, Fig. 20) which is indiCated by US" on V ditch of
the hook shaft.
III) Adjustment of operation: (Fig. 20 and 22)
1. Turn the machinepulley until the opener
(CD,
Fig. 22) presses the project-
ion of hook (@, Fig. 22)extremely on its travel.
2. Press the opener to the projection of hook and make the right side clea-
rance between the notch on the bobbin case holder and the tab of the hook
retainer (@, Fig. 22) 0.2mm as shown Fig. 22.
3. This adjustment can be done by loosening the screw (@, Fig. 20).
~i".
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Fig. 20
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Fig. 21
15
Fig. 22