– 29 –
) Determne the heght of needle.
. Set the sttch dal to 2.5 on the scale.
2. Turn the handwheel to brng the needle bar to
the lowest poston.
3. Remove cap
1
, loosen setscrews
2
n
needle drve arms
3
, adjust engraved marker
lnes
5
-A whch are the fourth from the
bottom of needle bars
4
to the bottom end
of needle bar lower bushng
6
, and tghten
needle drve arms
3
wth screw tghtenng
torque of 5.9 Nm (60 kgf cm) usng
setscrews
2
.
4. Turn the handwheel and adjust engraved
marker lnes
5
-B whch are the thrd from
the bottom of the needle bar to the bottom of
needle bar lower bushng
6
. (2.2 mm up) At
ths tme, t s the standard that the dstance
from the top end of the needle eyelet to the
blade pont of the hook s .2 mm.
The aforementioned adjustment
is applied to the case when
DPX5 needle is used. When
using DPX17 needle, adjust with
5
-C and
5
-D respectively.
When loosening/tightening
setscrew
2
, perform the work
so that needle drive arm
3
does
not move in the lateral direction.
When it moves, needle bar
torque or needle bar seizure will
be caused.
5. If the needle-to-hook relaton s dfferent from
the aforementoned standard adjustment,
remove needle clamp screw
8
and turn
needle clamp
7
by one revoluton (the extent
of adjustment : 0.6 mm). The needle-to-hook
relaton can also be adjusted by removng
screw
!0
from the sprng shoe and turnng
sprng shoe
9
by a half revoluton (the extent
of adjustment : 0.3 mm).
[ LH-4168-7, 4188-7 ]
6-4. Needle-to-hook relation
4
3
5
-A
5
-B
6
5
-C
5
-D
1
2
!0
7
8
9
1.2 mm
2.2 mm