SunStar KM-250 Series, Руководство пользователя

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11) Stitch Length Adjustment
As is shown in Fig. 31, the number marked by the stitch
adjusting dial
①
signifies the stitch length in mm units.
Move the dial sideways to set it to the desired stitch length
(Turn it in clockwise direction and the stitch length will
decrease while turning it counterclockwise will increase the
stitch length.)
12) Height and inclination Adjustment of Feed Dog
(1) Height adjustment of the feed dog
(
※
For KM-350/530 Series users, the stitch length adjusting dial must be set to
“
0
”
here.)
The height of the feed dog is adjusted by moving the lifter crank
①
after the lifter crank fixing screw
②
is loosened. The
standard height from the top face of the needle plate to the top of the feed dog when the stitch length dial is at its
maximum and the feed dog is at its highest point is 0.6~0.7mm for very thin materials, 0.75~0.85mm for general
materials, and 1~1.2mm for heavy materials. (See Fig. 32)
(2) Inclination adjustment of the feed dog
A. To adjust the inclination of the feed dog, first loosen the feed dog support shaft fixing screw ⑥ in the horizontal
pushing crank
④
and adjust by turning feed dog support shaft
⑤
up and down in the direction of the arrow with a
driver. Turning the feed dog support shaft
⑤
clockwise will raise the front part of the feed dog, while turning it
counterclockwise will lower the front part of the feed dog. (See Fig. 33.)
B. The standard inclination of the feed dog is when the carved sign on the feed dog support shaft is horizontally in line
with the horizontal pushing crank as in picture in Fig. 33. However, to prevent puckering, adjust the feed dog to
that the front is a little higher than the back as in picture in Fig. 33. Also, to prevent material jamming, lower the
front of the feed dog as in picture in Fig. 33.
C. Adjustment of the inclination of the feed dog
③
will result in a change in the height of the feed dog, so recheck the height.
[Fig. 31]
[Fig. 32]
[Fig. 33]
For very thin materials
For general materials
Feed Dog
Feed Dog
(Front)
(Back)
(Higher front)
(Standard position)
(Lower front)
Needle Plate
For heavy materials
Keystone Sewing Machine Company, Inc.