– 33 –
❺
1) Set the stitch dial at the minimum value. Then, remove hinge screw
❶
. Move needle bar rocking rod
❷
from needle bar rocking rod arm
❸
to needle rocking rod fixing base
❹
and fix the rod with hinge screw
❶
.
3) Loosen setscrews
❾
and
(2 places) in
sprocket
. Loosen the setscrews in the order
of
and
❾
. At this time, remove screw No. 1
❾
which is put in screw hole
A
in sprocket
,
and put it in screw hole
C
which is located on
the opposite side at 180˚. (Fig. a)
Turn the pulley by 180˚ without turning the hook
driving shaft, align the flat section of the hook
driving shaft with screw hole
C
in sprocket
,
and fix with setscrews
❾
. Screw No. 1
in the
hook driving shaft rear bearing
aligns with the
flat section of the hook driving shaft. Make the
state as the standard. (Fig. b)
Then fix screw No. 2
which is put in screw
hole
B
in sprocket
as well.
6-1. Procedure of changing over between bottom feed and needle feed
and the adjustment (for LH-3528A only)
6. MAINTENANCE
❾
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
2) After replacing the feed dog and the throat plate
with the components for bottom feed, adjust the
position of needle rocking rod fixing base
❹
so
that the needle center aligns with needle holes
❼
in throat plate
❽
, and fix setscrews
❺
.
Then replace the presser foot with that for bot-
tom feed as well.
Needle
❾
❶
❷
❸
❽
❼
Fig. a
Fig. b
(1) Changing procedure to bottom feed and the adjustment
❷
❹
C
B
A
