− 28 −
4000
3500
3000
2500
2000
1500
1000
500
0
1 1.5 2 2.5 3 3.5 4 4.5 4.75 5 5.5 6 6.5
27. SEWING SPEED TABLE
26. ADJUSTING THE LIFTING AMOUNT OF THE PRESSER FOOT
AND THE WALKING FOOT
1
The maximum sewing speed has been specified in accordance with sewing conditions as shown in the table
below. Set the maximum sewing speed appropriately in accordance with the sewing conditions given taking
care not to exceed the corresponding specified value.
(1) Max. sewing speed in accordance with the amount of the alternating vertical
movement of the walking foot and the presser foot
1) When stitch length is 6 mm or less
2) When stitch length is more than 6 mm and 9
mm or less
Revolutions per minute (sti/min)
Amount of alternate vertical movement
of walking foot and presser foot (mm)
The lifting amount of the presser foot and the walking
foot is adjusted using dial
1
. Turn the dial clockwise
to increase the lifting amount or counterclockwise to
decrease it.
Amount of alternate vertical
movement of walking foot
and presser foot
Revolutions
per minute
1 to 6.5 mm
2000 sti/min
28. RESETTING THE SAFETY CLUTCH
The safety clutch functions when an excessive load
is applied to the hook or the other components during
sewing.
While the safety clutch if functioning, the hook will
never rotate even if turning the handwheel.
1) Reset the safety clutch with the sewing machine
tilted.
2) Fit screwdriver (medium)
2
supplied with the
machine as an accessory in hole
A
in safety
clutch bushing
1
.
3) Holding screwdriver
2
by hand to prevent
safety clutch bushing
1
from rotating, turn the
handwheel in the reverse direction of rotation.
4) The resetting procedure completes when the
handwheel clicks.
A
1
2
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of
the sewing machine.
Содержание LU-2220N-7
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