3 . Relationship between the fixed knife and the
movable knife (left) edge
( 1 ) The standard position is illustrated to the
right.
( 2 ) If the distance (0.3 mm) is too wide, such a
situation may allow for “triple” thread breakage
to occur, resulting in detached needle thread
after threads are cut. Also, if it is too narrow,
such a situation may lead to unexpectedly
uncut threads. Please keep this in mind.
( 3 ) The adjustment necessary in step ( 2 ) can
be done by correctly installing the fixed
knife bracket unit or correctly mounting
the fixed knife.
( 4 ) The fixed knife bracket unit has been
installed using screw Ⓐ with the bobbin
case holder position bracket removed (See
Fig. to the right).
4 . Knife driving shaft
( 1 ) The standard position is illustrated to the right.
( 2 ) When assembling, the knife driving shaft must
first be put through the knife driving crank.
( 3 ) The cam follower crank ( 1 ) must be
positioned as illustrated to the right, and
set to the flat on the knife driving shaft.
( 4 ) The stopper must be set to the flat on the
knife driving shaft in such a way that the
knife driving shaft is snug and smoothly
turns in the shaft direction.
5 . Installing the thread trimmer solenoid unit
( 1 ) Operation stroke of the thread trimmer
solenoid
①Standard operation stroke is 6 mm.
②This stroke can be adjusted by using nut Ⓐ.
( 2 ) Installing the unit
①The unit can be mounted by using screws
Ⓑ and Ⓒ.
②Clearance of 1 mm must be insured
between the driving lever and cam follower
crank ( 2 ) with stopper nut Ⓐ made contact
with the solenoid.
③In such a situation, activating the solenoid
should create a clearance of 1.5 mm
between cam follower crank ( 1 ) and ( 2 ).
This situation is standard. To meet this
standard, slide the solenoid mounting
bracket in the direction of the arrow as
illustrated, if adjustment is needed.
HOW TO USE
Screw Ⓐ
Fixed knife
bracket unit
Driving lever
Cam follower
crank (2)
6 mm
Solenoid mounting
bracket
Ⓐ
Ⓑ
Ⓒ
Cam follower crank (2)
Cam follower
crank (1)
1 mm
1.5 mm
Coil spring
Cam follower crank (1)
102 mm
Cam follower crank (2)
Bushing
Knife driving shaft
Stopper
0.3 mm
Movable knife (left)
Fixed knife
(Knife edge)
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