JUKI LK-1900A Instruction Manual page 80

(4) Adjusting the button clamp support
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
q
(5) Checking the needle entry point
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
When checking the shape of the sewing pattern, fit the second stitch of the needle entry to the button hole, and tighten
screw y. (Refer to the item of checking the shape of the sewing pattern in the instruction manual for the LK-1900A.)
(6) Adjusting the button clamp base and the feed plate
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
1) As for the attaching height of button clamp base e, adjust the vertical position so that the bottom face of the button
clamp base and the top face (knurl face) of feed plate A can equally press the material. Then tighten setscrew i.
2) Adjust the position X (protrusion of the material), position of feed plate A u against button clamp base e, according
to the thickness of the material using setscrew o. The standard adjustment value is 0.5 mm.
e
w
r
Allow the needle to come as near as the
Second
left side of the button hole without
stitch
striking the button hole.
q
e
Loosen setscrew q, and place the button to be used in
between the button clamps. Then determine the longitudinal
position of the button hole and the slot of button clamp base
r by moving button clamp support, front w and rear e
back and forth. Then securely tighten the setscrew. At this
time, if the clearance between button clamp support, front
w and rear e is a little smaller (approx. 0.5mm) than the
outside diameter of the button to be placed, the button is
securely clamped.
r
q
74
q
X
0.5mm
w