14
ADJUSTMENT OF NEEDLE BAR HEIGHT
When the tip of the rotary hook exactly meets the right side of the needle in ascending travel of
the needle bar from its lowest position at the left needle drop position with the pattern selector
dial set at “ “ and the maximum zigzag width selected, the distance between the upper edge of
needle eye and the race of rotary hook should be 1.7 to 2.1 mm.
(1) Set the pattern selector dial at “ “ and select the maximum zigzag width.
(2) Remove the set screw of the needle plate, and detach the needle plate and bobbin holder.
(3) Tilt the head backward, and open the face plate.
(4) Turn the balance wheel toward you until the rotary hook tip exactly meets the right side of
the needle at the left needle drop position.
(5) Loosen the set screw of the needle bar connecting stud.
(6) Move the needle bar to provide a distance of 1.7 to 2.1 mm between the upper edge of
needle eye and the race of rotary hook.
(7) Tighten the set screw of the needle bar connecting stud.
(8) Attach the bobbin holder and needle plate.
(Note)
When moving the needle bar in step (6), take care not to turn the needle bar.
Summary of Contents for HD3000
Page 1: ...SERVICING MANUAL HD 3000...
