17
12) Timing of needle plate, needle and feed dog
KM-380BL
Locating the feed dog and the needle plate
a. Loosen the screw
in Figure 23. Adjust the location of the feed dog so that the gap between the feed dog and the needle
plate before and after the movement is same. And adjust the feed dog movement to maximum.
b. After the adjustment, fasten the screw
.
Location of the needle hole and the needle on the feed dog
a. While descending the needle bar by turning slowly the pulley, check if the needle is descending toward the center of the
needle hole on the feed dog.
b. If the needle does not descend toward the center of needle hole on the feed dog,
Make sure if the screw in Figure 23 is fastened tightly to the V-groove on the shaft.
After loosening the screw , hold the lower part of the needle bar frame to adjust it to the correct location.
When the adjustment is finished, fasten tightly the screw .
[Figure 23]
KM-390BL
Locating the feed dog and the needle plate
a. Loosen the screw
in Figure 24. Adjust the location of the feed dog so that the gap between the feed dog and the needle
plate before and after the movement is same. And adjust the feed dog movement to maximum.
b. After the adjustment, fasten the screw
.
Location of the needle hole and the needle on the feed dog
While descending the needle from its highest point by turning the pulley manually, check if the needle is descending toward the
center of the needle hole on the feed dog. If the needle does not descend toward the center of needle hole on the feed dog, loosen
the screw
and hold the lower part of the needle bar frame to adjust it to the correct location. When the adjustment is
finished, fasten tightly the screw
.
[Figure 24]
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