– 44 –
(16) Adjusting the looper thread cam
1. Adjust so that thread comes off from the highest place of looper thread cam
when needles come down
and the top end of left needle
aligns with the bottom surface of looper
. Then tighten setscrews
to
fix the looper thread cam.
2. Preventing thread winding around the looper thread cam (former type)
Adjust the clearance provided between the top end of section
A
of looper thread winding prevention plate
and the edge of looper thread cam
to approximately 0 to 0.3 mm (the plate should not come in contact
with looper thread cam
).
Standard Adjustment
Thread
To align
3. Preventing thread winding around the looper thread cam (new type)
Adjust the clearances to 0.5 to 1mm (to a degree not coming in contact with bobbin thread cam
and
metal cover
) between the tip of bobbin thread entanglement preventive cutter
and metal cover
and
between the end plane of cutter
and that of bobbin thread cam
.
0.5 to 1mm
Front view diagram
A
Side view diagram
0.5 to 1mm
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...
