Siruba LKS-1900AN Instruction Book page 88

現象
Trouble
5. 常跳線
5. Stitch skipping
often occurs.
6. 上線從布的裡側露
出來。
6. The needle thread
comes out on the
wrong side of the
material.
7. 切線時斷線
7. Threads break at time
of thread trimming.
8. 上線纏結在夾線裝
置上
8. The thread clamp is
entangled with
needle thread.
9. 機線長度不一致
9. Uneven length of
the needle thread
10. 機線長度不能弄短
10. The length of needle
thread does not
become short.
11. 縫制開始第2針的底
線結線部露出表面
11. The knotting section
of bobbin thread at
2nd stitch at the
sewing start appears
on the right side.
P69
原因
Cause
① 針和旋梭調整不好。
② 針和中旋梭的間隙過大。
③ 針彎了。
④ 驅動器把針弄得過彎。
① The motions of the needle and
shuttle are not properly synchronized.
② The clearance between the needle
and shuttle is too large.
③ The needle is bent.
④ The driver excessively bends the
needle.
① 上線張力不好。
② 線張力盤浮起機構不動作。
③ 切線後的上線過長。
④ 針數少。
⑤ 縫製長度短時（縫製背面上線頭
露出。）
⑥ 針數少。
① The needle thread tension is not
high enough.
② The tension release mechanism fails
to work properly.
③ The needle thread after thread
trimming is too long.
④ Number of stitches is too few.
⑤ When sewing length is short (End
of needle thread protrudes on the
wrong side of sewing product.)
⑥ Number of stitches is too few.
① 動刀位置不正確。
① The moving knife has been
improperly position.
① 縫製開始的上線太長。
① The needle thread at the sewing
start is too long.
① 挑線彈簧的張力太低。
① The tension of thread take-up
spring is too low.
① 第 1 線張力器的張力太低。
② 挑線彈簧張力過強。
③ 因為挑線彈簧的張力過低，所以
動作不穩定。
① The tension of thread tension
controller No. 1 is too low.
② The tension of thread take-up
spring is too high.
③ The tension of thread take-up
spring is too low and motion is
unstable.
① 梭芯的空轉大。
② 底線張力太低。
③ 第 1 針的上線張力過強。
① Idling of bobbin is large.
② The bobbin thread tension is too
low.
③ The needle thread tension at 1st
stitch is too high.
對策
Corrective measures
◎ 調整針和旋梭的位置。
◎ 調整針和旋梭的位置。
◎ 更換機針。
◎ 調整驅動器的位置。
◎ Correct the positions of the needle and shuttle.
◎ Correct the positions of the needle and shuttle.
◎ Replace the bent needle.
◎ Correctly position the driver.
◎ 加強上線張力。
◎ 確認縫製中第 2 線張力盤是否浮起。
◎ 加強第 1 線張力。
◎ 把夾線裝置設定為 OFF。
◎ 把夾線裝置設定為 OFF。
◎ 使用暗縫式下板。
◎ Increase the needle thread tension.
◎ Check whether or not the tension disc
No. 2 is released during bar-tracking.
◎ Increase the tension of the thread tension
controller No. 1.
◎ Correct the position of the moving knife.
◎ Turn OFF the thread clamp.
◎ Turn OFF the thread clamp.
◎ Use the lower plate, the hole of which is
larger than the presser.
◎ 調節動刀位置。
◎ Correct the position of the moving knife.
◎ 鎖緊第 1 線張力器，把機線長度調整為
33 ∼ 36mm。
◎ Tighten thread tension controller No. 1 and
make the length of needle thread 33 to 36mm.
◎ 提高挑線彈簧的張力。
◎ Increase the tension of the thread take-up
spring.
◎ 增強第 1 線張力器的張力。
◎ 降低挑線彈簧的張力。
◎ 增強挑線彈簧的張力，行程也變長。
◎ Increase the tension of thread tension
controller No. 1.
◎ Decrease the tension of thread take-up spring.
◎ Increase the tension of thread take-up spring
and lengthen the stroke as well.
◎ 調整活動刀位置。
◎ 增強底線張力。
◎ 下降第 1 針的上線張力。
◎ 把夾線裝置設定為 OFF。
◎ Adjust the position of the moving knife.
◎ Increase the bobbin thread tension.
◎ Decrease the needle thread tension at 1st
stitch.
◎ Turn OFF the thread clamp.
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