EasyManuals Logo
Home>JUKI>Sewing Machine>LBH-772NV-1

JUKI LBH-772NV-1 User Manual

JUKI LBH-772NV-1
47 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #44 background imageLoading...
Page #44 background image
25
^. TROUBLES AND CORRECTIVE MEASURES
Troubles
1. Needle thread breaks.
A. The needle thread
breaks at random in the
parallel portion of a
buttonhole.
B. The needle thread
breaks at the first
bartack stitches.
C. The needle thread
breaks at the start of
sewing.
2. The needle thread slips
out of the needle eyelet at
the start of sewing.
3. The needle thread is not
cut at the time of thread
trimming.
4. The gimp cannot be cut.
5. When the gimp cutter
opens, it fails to cut the
gimp.
6. The needle breaks.
Causes
1 Thread tension is not properly adjusted.
2 Blade point of the hook has scratches.
1 The position of the gimp guide finger is too
far left from the left stitch base line and the
needle thread is caught at the top end of
the guide finger causing needle thread
breakage when shifting the stitch base line
between the left stitch base line and the
right stitch base lien.
1 Thread tension is improperly adjusted. Th
needle thread tension is particularly too
low.
1 The tension controller No. 2 provides an
excessive thread tension.
2 The needle thread and the gimp cord are
drawn by the same portion of the pull-in
plate and cut.
3 The gimp guide finger is positioned too
high, preventing the needle thread and the
bobbin thread from making knots.
1 The moving knife fails to mesh with the
stationary knife.
2 The moving knife or the stationary knife
has worn out.
1 The moving knife fails to mesh with the
stationary knife.
2 The gimp used is too thick.
3 The gimp guide finger is improperly
positioned at the time of stop motion.
1 The moving knife or the stationary knife
has worn out.
2 The needle comes in contact with the
blade point of the hook.
3 When the gimp cutter opens, the cutter
comes in contact with the the needle.
1 The needle is bent.
2 The needle comes in contact with the
blade point of the hook.
3 When the gimp cutter opens, the cutter
comes in contact with the the needle.
Corrective measures
Adjust first the bobbin thread tension 0.3 to
0.45N, then, adjust the needle thread
tension. (Page 9 )
Buff up the blade point of the hook to
remove scratches.
Change the position of the gimp guide
finger closer to the left stitch base line
ensuring that the gimp is neatly sewn in
the stitches. (Page 16)
Increase the needle thread tension. (Page
9)
(In many cases, the tension provided by
the tension controller No. 2 is too low.)
Decrease the thread tension provided by
the tension controller No. 2, and increase
the tension provided by the tension
controller No.1 while visually checking the
stitches. (Page 9)
Cut the needle thread and the bobbin
thread separately. (Page 18)
If the gimp guide finger is positioned too far
to the left at the time of stop-motion, shift it
to the right.
Loosen the gimp guide holder and lower
the gimp guide finger to the extent that it
does not come in contact with the retaining
spring or the work clamp check. (Page 16)
Adjust the position of the thread trimming
yoke so that the moving knife and the
stationary knife properly mesh with each
other. (Page 12)
Replace the moving knife or the stationary
knife with a new one. (Page 20)
Adjust the position of the thread trimming
yoke to allow the knives to mesh properly
with each other. (Page 12)
The cutter is capable cutting a gimp
approximately as thick as Vinylon #5. So,
replace the gimp with a thinner gimp cord.
Raise the position of the gimp guide finger.
At the time of stop motion, adjust the
position of the gimp guide finger. (Pages
16 and 18)
Replace the moving knife or the stationary
knife with a new one. (Page 20)
Adjust the position of the gimp guide finger
to allow the gimp to be neatly sewn in the
stitches. (Page 16)
Properly adjust the needle-to-hook timing.
(Page 11)
Replace the needle with a new one.
Properly adjust the needle-to-hook timing.
(Page 11)
Check whether the stop-motion position is
correct and also whether the locking plate
properly meshes with the guide plate
locking pin when the cutter actuates.
(Page 11)
iv
iv
6.使は、ん。
ため、電源の切り忘れに注意してください。
7.め、使
ださい。
給  
1.機械の給油箇所には、JUKI 純正オイル,JUKI 純正グリスを使用してください。
2.炎症,カブレを防ぐため、目や身体に油が付着した時は、直ちに洗浄してください。
3.下痢,嘔吐を防ぐため、誤って飲み込んだ場合は、直ちに医師の診断を受けてください。
保  
1.め、理,調
い。た、は、使い。理,調
よび非純正部品使用による事故に対しては、当社は責任を負いません。
2.め、理, ( ) は、
の有る人、または当社,販売店の技術者に依頼してください。
3.め、使
行う時は、空気の供給源のパイプを外し、残留している空気を放出してから行ってください。
4.め、調整,は、じ,
とを確認してください。
5.使は、い。際、め、
必ず電源を切りミシンおよびモータが完全に停止したことを確認してから行ってください。
6.守,検,は、
い。合、
続けますので注意してください。
7.め、理,調果、し、
または販売店に連絡し、修理依頼してください。
8.め、は、り、
から、同一容量のヒューズと交換してください。
9.め、
さい。
使
1.め、 ( )
境下で使用してください。
2.誤動作による事故防止のため、定格電圧 ±10% を超えるところでは使用しないでください。
3.め、使は、
認してから使用してください。
4.安全にお使いいただくために、下記の環境下でお使いください。
動作時 雰囲気温度 5℃〜 35℃
動作時 相対湿度 35% 85%
5.め、
時は結露が生じることがありますので、十分に水滴の心配がなくなってから電源を入れてください。
6.壊,め、め、
プラグを抜いてください。
7.は、ビ,す。は、
ミシンより離してご使用ください。
8. 85dB 90dB
は、じ、使い。
た、 90dB は、
使に、使
の見やすい場所に掲示するようにお願いします。
9.製品や梱包の廃棄,使用済みの潤滑油などの処理は、各国の法令に従って適正に行ってください。

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the JUKI LBH-772NV-1 and is the answer not in the manual?

JUKI LBH-772NV-1 Specifications

General IconGeneral
BrandJUKI
ModelLBH-772NV-1
CategorySewing Machine
LanguageEnglish

Related product manuals