– 19 –
ENGLISH
1. MAINTENANCE
#
. MAINTENANCE OF SAWING MACHINE
1-2. Adjusting the needle-to-shuttle relation
Relation between the needle and the marker
lines on the needle bar
* Turn ON the power once, and turn OFF the
power again after making the intermediate
presser in the lowered state.
1) Turn the pulley by hand to adjust so that lower
marker line
2
on needle bar
1
aligns with the
bottom end of needle bar lower metal
3
while
needle bar
1
is ascending.
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start or
the sewing machine.
2
3
1
2) Loosen setscrew
4
in the driver. Drawing bob-
bin case opening lever hook
5
toward you,
open it to the right and left until bobbin case
opening lever
6
comes off.
At this time, be careful not to let
shuttle
7
come off and fall.
3) Adjust so that the point of shuttle
7
meets the
center of needle
8
, and that a clearance of 0
mm is provided between the front end face of
driver
9
and needle as the front end face of
driver receives needle to prevent the needle
from being bent. Then tighten setscrew
4
.
4) Loosen shuttle race screw
!0
, and adjust the
longitudinal position of the shuttle race. To do this
adjustment, turn shuttle race adjusting shaft
!1
clockwise or counterclockwise to provide a 0.05
to 0.1 mm clearance between needle
8
and the
blade point of shuttle
7
.
5) After adjusting the longitudinal position of
shuttle race, further adjust to provide a 7.5 mm
clearance between the needle and the shuttle
race. Then, tighten screw
!0
of shuttle race.
6) When changing the number of needle from the
number at the time of standard delivery or us-
ing a new driver, perform the adjustment of the
height of driver.
0.05 to 0.1 mm
7.5 mm
8
7
!0
!1
7
4
6
5
6
5
4
8
7
9
0 mm
0 mm
Summary of Contents for AMS-210EN-7450
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