10. STANDARD￿ ADJUSTMENTS

￿

￿￿-￿. Adjusting the needle and hook timing

3974Q

 

Mark

Lowest

 

 

position

3973Q

2168Q

2837Q

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.

3975Q

￿￿-￿. Adjusting the clearance between needle and hook point

0.01 - 0.08 mm

2839Q

3976Q

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).

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HE-800A