– 30 –
2) Determne the poston of the hook.
. Loosen three setscrews
8
n the screw gear
(small).
2. In ths state, loosen four setscrews
!1
n
hook drvng shaft saddle
!0
, and move hook
drvng shaft saddle
!0
to the rght or left to
adjust so that a clearance of 0.0 to 0.05 mm
s provded between blade pont
7
of the
hook and needle
9
. Then tghten setscrews
!1
.
3. In the state descrbed n step )-4., algn
blade pont
7
of the hook wth the center of
the needle and tghten setscrews
8
n the
screw gear (small).
0.01 to 0.05 mm
8
!0
!1
!1
9
7
7
9
[Reference dimension] Needle clamp height at needle bar lower dead point
A
A
Throat plate
installing plane
Throat plate
installing plane
S, F type
G type
LH-428, 428-7
LH-468-7 S type
LH-468-7 G type
LH-488-7
Dmenson A
5. ± 0.5 mm
5.8 ± 0.5 mm
4.6 ± 0.5 mm
5.2 ± 0.5 mm