SEWING MACHINE’S MECHANICAL ADJUSTMENT (BARTAKE)

Adjusting the needle bar height 

 

Adjusting the needle bar height

Turn the pulley to move the needle bar to the lowest position. Then remove the rubber cap (2), loosen the screw (3) and then move the needle bar up or down to adjust so that the second reference line from the bottom of the needle bar (reference line A) is aligned with the lower edge of the needle bar bush (1). * If using a DP x 5 needle, use the highest reference line (reference line a).

Adjusting the needle bar lift amount

Adjusting the needle bar lift amount

Turn the pulley to raise the needle bar from the lowest position until the lowest reference line on the needle bar (reference line B) is aligned with the lower edge of the needle bar bush (1). Then loosen the bolt (2) and move the driver (3) to adjust so that the tip of the rotary hook is aligned with the needle center line. * If using a DP x 5 needle, use the second reference line from the top on the needle bar (reference line b).

Adjusting the driver needle guard

Adjusting the driver needle guard

 Turn the pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw (2) and turn the eccentric shaft (3) to adjust so that the driver needle guard (1) contacts the needle.

Note: If the needle contact pressure is too great, skipped stitches may occur. On the other hand, if the driver needle guard (1) is not touching the needle, the tip of the inner rotary hook will obstruct the needle, resulting in an excessively high amount of friction.

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