– 7 –
1. When motion of thread is very rough, and stable seams can not be
obtained, there are cases where the condition can be improved by
the following threading.
(1) Wind thread around 1st thread guide
.
(2) Wind thread around the thread tension thread guide
.
2. When using more stretchable thread (wooly thread or the like), the
threading as given below does not make thread stretch and neat
seams can be obtained.
(1) Do not pass thread (for spreader) through spreader auxiliary
thread tension
.
(2) Do not pass thread (for spreader) through the thread tension
disk
E
.
(3) Do not pass thread through the looper thread small tension disk
.
o When threading is not properly
performed, not only sewing
trouble occurs, but also needle
breakage is caused. So, be
careful.
Adjustment Procedure
Results of Improper Adjustment
Do not pass thread.
Engraved marker line
Summary of Contents for MF-7800D Series
Page 64: ...60 5 Adjusting the upper knife stroke A B Standard Adjustment H21...
Page 66: ...62 MEMO...
Page 80: ...76 3 Adjusting the elastic band presser plate 0 5mm Standard Adjustment E10 A A Approx 7 5 mm...
Page 84: ...80 MEMO...
Page 94: ...90 3 Setting of SC 510 2 Change of the setting Type B Type A Standard Adjustment UT25...
Page 114: ...110 MEMO...
Page 118: ...114 2 Installing SC 510 1 Wiring SC 510 Standard Adjustment UT22...
Page 124: ...120 MEMO...
Page 134: ...130 MEMO...
Page 142: ...138 7 Feed timing of the roller A Standard Adjustment PL11 C D B...
