<Length (A, B)>

ㆍ First remove the A not by turning to the leftward and adjust the hexagonal head whape of B screw.
ㆍ And if you turn left, the shuttle thread becomes longer and if your turn right, the shuttle thread becomes shuttle thread becomes shorter.
ㆍWhen a desired length is attained, tighten the hexagonal head shape of A nut to the rightward direction.

<PICTURE 1>

<Thickness (C, D)>

ㆍRemove the butterfly nut turning the leftward and adjust the controlling screw D.
ㆍ And if you turn left, the shuttle thread becomes thinner and if you turn rignt, the shuttle thread becomes thicker.
ㆍ When a desired thickness is attained tighten the butterfly nut C to the rightward direction.

<PICTURE 2>

<Shape (E,F)>

ㆍ Remove the butterfly nut E and adjust the control screw F
ㆍ And if you turn left, the shuttle thread becomes a round shape and if you turn right. The shuttle thread becomes a pointed shape.
ㆍ When a desired shape is attained, toghten the butterfly nut E

<PICTURE 3>

<Tension (G, H)>

ㆍ Adjust tension of bobbin yarn using guide spring nut G & roller holder spring nut H
 

<PICTURE 4>

<Shape (I)>

The shape of the bobbin can be controlled by adjusting the heignt to bobbin spindle  

<PICTURE 5>