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HE-800A
10. STANDARD ADJUSTMENTS
73
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. Adjusting the needle and hook timing
1. Set the sewing machine to the home position and then press the RESET key.
2. Loosen the two screws (2) of the rotary hook joint (1).
3. Turn the pulley in the regular direction of rotation (toward the front) so that the needle bar (3) just begins to rise from
its lowest position.
4. Insert the “2” part of the gauge (4) between the needle plate (5) and the lower edge of the needle bar (3), and then
align the rotary hook point (6) with the center of the needle when the needle bar contacts the gauge.
* Different gauges are used for each of the two specifications -2 and -3, so make sure that the gauge being used matches
the specifications and application for the sewing machine being adjusted.
Note:
When installing the rotary hook joint, install using
the set screw so that the oil inlets in the rotary
hook and rotary hook joint (7) are aligned.
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. Adjusting the clearance between needle and hook point
1. Set the sewing machine to the home position and then press the RESET key.
2. Loosen the screws (3) and move the rotary hook (4) forward or back until there is a clearance of 0.01 to 0.08 mm
between the needle (1) and the hook point (2).
0.01 - 0.08 mm
2837Q2168Q
3973Q
3975Q
2839Q 3976Q
Lowest
position
Mark
3974Q