18
(2) Adjusting the timing of hook edge and needle center crossing
First, set the stitch length at “0”. Adjust the hook gear clamp screw ① in Figure 25 so that the hook edge fall exactly at
the center of the needle center when the needle bar is raised 2.4 mm from its lowest position as in Figure 24. When this is
done, the hook edge will be placed at about 1.5 mm above from the front of the needle thread hole.
[Figure 24]
[Figure 25]
①
9) Clearance adjustment between hook and opener
Loosen the opener clamp screw ③ and turn the opener ② to
the right and left so that the distance between the hook ①
and the opener ② is about 0.2mm as in Figure 28 when the
opener ② is pulled to its max towards the arrowed direction.
[Figure 28]
(3) Adjusting the distance between the needle and the hook edge
Raise the needle from its lowest point so that the hook edge meets the needle center. As in Figure 26, when the lower part
of the needle meets the balance point of the hook’s needle guide plate ① (adjust the needle guide form), adjust the
distance between the hook edge and the inner side of the needle groove to 0.05~0.1 mm. Loosen ①, ② and ③ in Figure
27 and move the hook base ④ to the left and right for adjustment. (After adjustment, fasten ①, ② and ③ firmly.)
[Figure 26] [Figure 27]
0.05~0.1mm
Adhering part
Needle
①
Hook edge
①
②
③
①
①
①
②
③
④
①
②
0.2mm
③
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