– 28 –
B
A
1.5 to 2mm
1. Standard position of the rear needle guard
(1) Height of the rear needle guard
It is the standard that the clearance provided
between crest line A of rear needle guard
and
the top end of right needle is 1.5 mm to 2 mm when
top end of the looper
comes from the extreme
right position to the center of right needle.
(2) Lateral position of the rear needle guard.
It is the standard that the lateral position of rear
needle guard
is the position where the rear needle
guard receives the needle in the range of B.
(3) Adjusting the longitudinal position of the rear needle
guard.
It is the standard that when top end of the looper
comes from the extreme right position to the center
of right needle, the clearance provided between the
right needle and top end of the looper
is 0 to 0.05
mm, when top end of the looper
comes to the
center of middle needle, the clearance provided
between the middle needle and top end of the looper
is 0 to 0.05 mm, and the pressing amount of the
top end of needle touches the rear needle guard.
(11) Adjusting the needle guard
Standard Adjustment
(4) Loosen two setscrews
in the rear needle guard cam and perform the adjustment of the rear needle
guard.
It is the standard position where setscrew
in the rear needle guard cam (screw No. 1 in the direction of
rotation) aligns with engraved marker dot
on the looper driving shaft.
Advanced
Retarded
0 to
0.05mm
0 to
0.05mm
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...
