7. STANDARD ADJUSTMENTS
BAS-311HN, BAS-326H
42
7-10. Rotary hook lubrication amount
The optimum position is when the head of the set screw (1) is
aligned with the edge of the bed. The rotary hook lubrication
amount can be adjusted within three turns to the right from
that position.
• If the set screw (1) is turned clockwise, the lubrication
amount becomes smaller.
• If the set screw (1) is turned counterclockwise, the
lubrication amount becomes greater.
7-11. Adjusting the position of the movable knife
1. Open the top cover and tilt back the machine head.
2. Turn the pulley (1) by hand to move the needle bar to its lowest position.
3. Loosen the nut (2), tighten the set screw (5) until the collar (3) touches the inside of the groove in the thread trimmer cam
(4), and then loosen the set screw (5) by approximately 1/4 of a turn.
4. Tighten the nut (2), and then check that the collar (3) is not touching the inside of the groove in the thread trimmer cam (4).
In addition, push the driving lever (6) by hand toward the thread trimmer cam (4) until the collar (3) touches the groove of
the thread trimmer cam (4), and then check that the driving lever (6) returns smoothly to its original position when it is
released.
5. Turn the pulley (1) by hand in the direction of the arrow to move the needle bar to its lowest position, and push the thread
trimming solenoid (7) as far as it will go.
6. With the collar (3) inserted into the groove of the thread trimmer cam (4), turn the pulley (1) by hand to set the driving lever
(6) to the reverse position and so that the driving lever (6) is at its lowest point (when the thread take-up (8) is close to its
lowest position).
3127B
Less oil
More oil
Aligned
3355B 3350B
<View from side of thread trimmer cam>
3351B
3352B
Reverse position (position where driving
lever is at its lowest point)
3059B
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