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5
.
Adjustments
調節裝置
26
5.2
下底線
5.2
Looper thread tension
底線導板
○
1
和支撐
○
2
要成一直線。
Align the right of the looper thread take-up guide
○
1
with that of the eyelet supporting plate
○
2
.
5.2.1
底線收緊時機
5.2.1
Timing of looper thread take-up
正確的凸輪
○
4
位置是當針桿
○
3
最高的位置下移
2.8mm
時,線通過
A
點。放鬆
○
5
去調整。
Position the looper thread take-up
○
4
as standard Fig.40
so that looper thread passes at the point A when
the needle bar
○
3
is lowered 2.8 ㎜ from the
highest point. Lossen the screws
○
5
to adjust it.
!
增加底線的鬆度,把線凸調快。
!
減
底線的鬆度,把線凸調慢。
!
To increase the looper thread take-up amount,
hasten
the timing.
!
To decrease the looper thread take-up amount,
delay the timing. Fig.41
註:當調整凸輪
○
4
時,面向凸輪
○
4
凸出的地方和
上線抬起時不用調整前後位置。
Note : When adjusting take-up
○
4
, face both bosses
of the take-up
○
4
and the top cover thread
take-up without shifting the front-and-rear
position.
注意:
如果時間差調超過會造成跳針。
CAUTION
Fig.42
If the timing of the looper thread take-up exceeds the
adjustable range, it may occur skip stitch.