Maintenance; Procedure Of Changing Over Between Bottom Feed And Needle Feed And The Adjustment (For Lh-3528A Only) - JUKI LH-3500A series Instruction Manual

6. MAINTENANCE

6-1. Procedure of changing over between bottom feed and needle feed
and the adjustment (for LH-3528A only)
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.
(1) Changing procedure to bottom feed and the adjustment
3
) Set the sttch dal at the mnmum value. Then, remove hnge screw 1 . Move needle bar rockng rod 2
from needle bar rockng rod arm 3 to needle rocking rod fixing base 4 and fix the rod with hinge screw 1 .
8
Needle
C
B
A
1
2
7
Fig. a
!3
!0
!2
!1
9
Fig. b
9
!0
!2
!1
!3
2) After replacng the feed dog and the throat plate
wth the components for bottom feed, adjust the
position of needle rocking rod fixing base 4 so
that the needle center algns wth needle holes
7 n throat plate 8 , and fix setscrews 5 .
Then replace the presser foot wth that for bot-
tom feed as well.
3) Loosen setscrews 9 and !3 (2 places) n
sprocket !2 . Loosen the setscrews n the order
of !3 and 9 . At ths tme, remove screw No.  9
whch s put n screw hole A n sprocket !2 , and
put t n screw hole C whch s located on the op-
posite side at 180˚. (Fig. a)
Turn the pulley by 180˚ without turning the hook
driving shaft, align the flat section of the hook
drvng shaft wth screw hole C n sprocket !2 ,
and fix with setscrews 9 . Screw No.  !1 n the
hook drvng shaft rear bearng !0 algns wth the
flat section of the hook driving shaft. Make the
state as the standard. (Fg. b)
Then fix screw No. 2 !3 whch s put n screw
hole B n sprocket !2 as well.
– 33 –
2
5
4