−
82
−
Trouble
Cause (1)
Cause (2)
Checking order and adjusting procedure
Page
From the previous page
1-6)
Thread is entangled in the
hook.
1-7)
Thread breakage due to needle
heat
1-8)
Position of thread take-up
thread guide (A) is improper.
1-9)
Thread breakage at the start of
sewing
1-10)
Thread breakage at the end of
sewing
1-11)
Partial catch of thread by hook
due to return of twist (Single
yarn catch)
9)-A
Tension at the start of sewing
is is too low.
9)-B
Soft-start speed is too fast.
9)-C
Number of stitches at the start
of sewing is too many.
9)-D
Thread breakage due to
piercing of needle
10)-A
Number of stitches of tie
stitching is too many.
10)-B
Width of tie stitching is too
narrow.
10)-C
Number of stitches of radial
shape at the end of sewing is
too many.
Remove thread (single thread) entangled in inner hook or outer hook.
Decrease the number of revolution.
Adjustment of thread take-up thread guide (A)
Increase tension at the start of sewing.
Delay the soft-start speed.
Decrease the number of stitches at the start of sewing.
Enter the start of sewing pitch.
Decrease the number of stitches of tie stitching.
Widen the width of tie stitching.
Increase the bar-tacking pitch.
Increase the stroke of thread take-up spring, decrease the tension and
make the loop smaller.
Advance the timing of catching thread at the blade point of hook, and
make the loop smaller to stabilize catching thread.
(See page 63.)
(See page 63.)
(See page 56.)
(See page 56.)
(See page 56.)
(See page 56.)
(See page 55.)
Summary of Contents for LBH-1700
Page 1: ...R ENGINEER S MANUAL 29339504 No 04 Electronic Buttonholing Machine LBH 1700 Series ...
Page 55: ... 51 MEMO ...
Page 124: ... 120 ...
