DIFFERENTIAL FEED
16
a
(1)
(3)
(2)
2
1.5
1.0
0.5
b
c
DF
SL
c
1. Remove: Mains lead - Machine base.
2. Set Stitch Length at
"5"
and differential feed dial at the neutral position
"1"
.
3. Turn the handwheel towards you, check whether both front and back feed dogs move at
equal lengths and the distance between them in motion does not vary, as shown on sketch
(1)
below.
4. If not, set Stitch Length at
"0.5"
, loosen screw
"a"
and then adjust crank
"b"
so that both
feed dogs move at equal length.
5. Tighten screw
"a"
. Set Stitch Length at
"5"
and double check if both feed dogs move at
equal length.
12~12.3mm
2mm
Summary of Contents for 745 -
Page 1: ...745 845 SERVICE MANUAL 2 2 5 5 1 3 5 NA 6 0 B 1 2 1 T P T P...
Page 18: ...a HEIGHT AND ALIGNMENT OF CLOTH PRESSER BAR 4a 5 b c 4 7mm...
Page 24: ...TIMING OF LOWER LOOPER 8a A B C D b a 5 2mm R1 Fig 1 Fig 2 Fig 3...
Page 51: ...ANNEX SETTING POSITIONS OF SL DF DIALS b c f d g e 2 1 C B A...
Page 61: ...M E M O...
