JUKI LU-1520NCS-7, Инструкция по эксплуатации

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25. ADJUSTING THE CLAMP PRESSURE
26. ADJUSTING THE LIFTING AMOUNT OF THE PRESSER FOOT AND THE WALKING
FOOT
27. SEWING SPEED TABLE
Loosen screw ❶ . Adjust the clamp pressure by turn-
ing the cramp arm
❷
in the direction of the arrow.
Adjust the clamp pressure so that the bobbin thread
comes off at the pressure of 0.3 N.
❷
❶
The lifting amount of the presser foot and the walking
foot is adjusted using dial
❶
. Turn the dial clockwise
to increase the lifting amount or counterclockwise to
decrease it.
❶
The maximum sewing speed has been specified in
accordance with sewing conditions as shown in the
left table.
Set the maximum sewing speed appropriately in ac-
cordance with the sewing conditions given taking care
not to exceed the corresponding specified value.
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.
Amount of alternate vertical
movement of the walking foot
and presser foot
Stitch length :
7 mm or less
Less than 4.75 mm 2,000 sti/min
4.75 mm to less than 6.5 mm 1,800 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. At this time, the hook will never rotate
even if turning the handwheel.
When the safety clutch has functioned, remove the
cause and reset the safety clutch as given in the
following procedure.
1) Pressing push button ❶ located on the top sur-
face of the machine bed, strongly turn the hand-
wheel in the reverse direction of rotation.
2) The resetting procedure completes when the
handwheel clicks.
(Caution) Turn the handwheel by hand, and confirm
that push button ❶ has returned.
❶
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.