29
8-5. Adjusting needle bar height
·When needle bar① is placed at the lowest position, align carved
lineⓐ of needle bar① with lower part of needle bar lower
bushing②. (Be cautious of DA needle and DB needle position)
1. Turn pulley to put needle bar① at the lowest position.
2. Detach rubber cover③ on side-board.
3. Loosen clamp screw④ lightly to adjust needle bar①.
4. Fasten clamp screw④ tightly.
5. Install rubber cover③.
8-6.
Adjusting height and slope of feed dog
·The maximum height of feed dog① from the upper surface of
needle plate is 0.8mm(for KM-2300
A and
Gtype) and
1mm(for KM-2300
B and
H type)
1. Turn pulley to stop feed dog at the highest position.
2. Bend the machine backward.
3. Loosen fixing screw② and fixing screw④ lightly.
4. Adjust feed dog height and slope by turning lifter crank
eccentric shaft① and eccentric shaft③ of feed dog bed crank.
5. Refer to the right side figure to see movement direction of
feed dog bed⑥ according to rotation direction of each
eccentric shaft.
6. After finishing adjustment, fasten fixing screws② and ④ by
pushing eccentric shafts ① and ③ to the direction of shaft.
[ Figure 45 ]
[ Caution ]
1. When feed dog slope is adjusted only with one eccentric shaft, height of feed dog will change. Therefore make sure to
adjust two eccentric shaft.
2. Moving position of feed dog may change according to eccentric shaft adjusting position. In this case, adjust moving position
of feed dog after loosening fixing screw⑤ of feed dog bed crank⑦.
①
③
④
⑦
⑤
⑥
②
[ Figure 44 ]
②
②
①
①
ⓐ
ⓐ
DB×1DA×1DB×1
Heavy Materials
①
④
③
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