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17.机针与旋梭同步调整（图 21.22.23.24）/ Synchronous adjustment of needle and rotary hook（Fig 21 22 23 24）
1、机针位置的调节
用手转动主动轮，使针杆（C）下降至最低位
置，卸下面板（A）上的橡皮塞，旋松针杆（C）
上的针杆接头螺钉（B），上下移动针杆（C），
初步定出同步位置（针杆的同步位置，当针杆下
降至最低位置时，机针线孔的中心（D）应与旋梭
内周面（E）在同一位置上。如图24所示位置）。
旋紧针杆接头螺钉（B），塞上橡皮塞即成。
2、旋梭同步的调节
旋梭和机针之间的相互运动关系，对缝纫性
能的影响很大。标准的同步关系是：用手转动上
轮，使机针向下运动到最低位置后再向上回升2.5
毫米，这时旋梭钩线尖(D)，应与机针的中心线
（C）一致，在此位置时, 钩线（D）应高于机针
线孔（E）上边约1.2毫米。
在调节旋梭的同步关系时，还要注意到旋梭
尖与机针的侧面间隙。机针（D）缺口，底部与旋
梭钩线尖（C）的间隙为0.05毫米
1. Adjustment of needle position
Turn the driving wheel by hand to lower the
needle bar (C) to the lowest position, remove the
rubber plug on the panel (A), loosen the needle bar
connector screw (B) on the needle bar (C), and move
the needle bar (C) up and down. The synchronization
position is initially determined (the synchronization
position of the needle bar. When the needle bar is
lowered to the lowest position, the center (D) of the
needle thread hole should be at the same position as
the inner circumference (E) of the hook. As shown in
Figure 24 Show location). Tighten the needle bar
connector screw (B), and plug the rubber stopper.
2. Adjustment of the hook synchronization:
The mutual movement relationship between
the hook and the needle has a great influence on the
sewing performance. The standard synchronization
relationship is: turn the upper wheel by hand to
make the needle move down to the lowest position
and then rise back up by 2.5 mm. At this time, the
hook thread tip (D) should be consistent with the
needle center line (C) .At this position, the hook
thread (D) should be about 1.2 mm higher than the
upper edge of the needle thread hole (E).
When adjusting the synchronization relationship of the rotary hook, also pay attention to the side clearance
between the tip of the rotary hook and the needle. The needle (D) notch, the clearance between the bottom and
the hook thread tip (C) is 0.05 mm
D
E
C
D
E
0.05mm
11
A
B
C
D
B
C
A
21
22
23
24
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