Needle And Hook Timing; Location Adjustment Of Hook Holder - SunStar KM-2070P User Manual

9) Needle and Hook Timing

A. Turn on the power switch.
B. Press N1 and N2 key on the operation panel at the same time.
(Refer to hook test function in 14-3)
C. Take off presser foot, needle plate, auxiliary needle plate, feed dog, and
needle plate spacer.
D. Place auxiliary needle plate① to needle plate attachment part of sewing
machine bed.
E. When matched from the upper face of auxiliary needle plate ① to the
bottom of needle bar② with height of timing gauge B③ by turning
sewing machine pulley and raising the needle bar② higher than the
lowest point, check the followings:
· Match the sharp end④ of hook with center of needle.
· Interval of sharp end④ of hook and needle is 0~0.05mm.
[ Note ]
As thickness of needle plate and auxiliary needle plate① is
different, must use auxiliary needle plate② for sure.
F. If the above status is not made, adjust location of hook⑤ by unscrewing
the hook fixing screw.
After adjusting, fasten the fixing screw.
G. When the needle is at the closest location to the left, if point ④ of hook
matched to the center of needle by turning the sewing machine pulley,
check whether size of point④ of hook is 0.2~0.5mm from the upper end.
※ If the size does not meet, adjust height of needle bar.
H. In case that over-lapped section sewing causes needle flow, make
needle support to contact to needle by bending needle support⑥ as
shown in the figure (a).
※ Since then, check whether interval of point④ of hook and needle is
0~0.05 mm.
I. Pressing PARA/SET key on operation panel, it is converted to
embroidery available status.
■ In case of using 10mm
1) Move the location of needle to the leftest place.
2) When point④ of hook matched to the center of needle by turning the
sewing machine pulley, adjust needle position whether distance is
0.2~0.5mm to point④ of hook from the upper end of needle hole.
3) In case of using ZigZag width 10mm, change needle plate, feed dog,
needle bar stopper for 10mm.

10) Location Adjustment of Hook Holder

Adjust that end of hook holder① should come to the location
0~0.05 away from end of A part of internal hook②.
※ Keep end of hook holder① never comes out to the right
than end of A part of internal hook②.
A. Unscrew the fixing screw③ and adjust location of
hook fixing ①.
B. Fasten fixing screw③ tightly.
③
ZigZag Width 0mm
ZigZag Width Max.
③
27
②
①
④
④
0~0.05mm 0~0.05mm
→ ← ←
⑤
0~0.05mm
④
⑥
(가)
①
0~0.5mm
→
①
③
②
R
[ Fig. 32 ]
←
[ Fig. 33 ]