ZOJE ZJ9700, Operation Manual

Page: 37 / 86

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24.Adjusting the height of the presser bar (Fig.30)
l.Adjust the timing between the needle and the
hook as follows:
1)Turn the handwheel to bring the needle bar
down to the lowest point of its stroke,and
loosen setscrew
①
.
*Adjusting the needle bar height
2)Align marker line A on needle bar
②
with
the bottom end of needle bar lower bushing
③
,
then tighten setscrew
①
.
*Adjusting position A of the hook
3)Loosen the two hook setscrews,turn the handwheel,and align marker line B on ascending needle bar
② with the bottom end of needle bar lower bushing ③ .
4)After making the adjustments mentioned in the above steps align hook blade point
⑤
with the
center of needle ④ .Provide aclearance of 0.04mm to 0.lmm between the needle and the hook,then
securely,tighen the hook setscrews.
*Note that the type of hook to be substituted for when replacing the hook ,shall be in conformity with
the very type of the hook installed in the sewing machine of odginal assemblage.
l)Loosen setscrew
①
,and adjust the presser
bar height or the angle of the presser foot.
2)After adjustment,securely tighten the
setscrew.
1)When sewing heavy -weight materials,move
thread guide
① to the left(in direction A)to
increase the length of thread pulled out by the
thread take-up.
2)When sewing light-weight materials,move
thread guide
① to the right (indirection B)to
decrease the length of thread pulled out by the
thread take-up.
3)Normally ,thread guide
①
is positioned in a way that marker line C is aligned with the center of the
screw.
23.Needle-to-hook relationship (Fig.29)
25.Counter knife (Fig.31)