B0
2
1-47
S-4001 ISBH+I SM 30°
Released: 09/2017
E-mail: [email protected]; webside: amfreece.com
Phone: +420 582 309 146; Fax: +420 582 360 606
E - STANDARD MACHINE ADJUSTMENT
13. THREAD DRAW-OFF
13.1.
Adjustment of the Draw-Off Lever Position
The correct adjustment ensures a long enough thread tail for starting the sewing of the next buttonhole.Remove
the covers because this mechanism adjustment is performed in the rear of the head. Air supply is necessary for this
adjustment.
a) Loosen the screw
6
.
b) The piston
7
of the cylinder
8
is in the home position (retracted). Move the lever
9
to the pin
10
with minimal
clearance 0.1 mm. Tighten the screw
6
.
c) Check the correct clearance adjustment by switching the valve
11
of the draw-off cylinder (YV1).
13.2. The Thread end Adjustment
If the first stitches are missing or the buttonhole is not sewn, follow the below mentioned steps:
a) Loosen the screw
1
.
b)
Turn the draw-off lever
2
counter clockwise to increase the thread tail length; turn the draw-off lever clockwise
to decrease the thread tail length.
13.3. Locking the Stitches
If the skipped stitches problem appears during the sewing, follow the below mentioned steps:
a) Loosen the screw
3
.
b) Move the thread take-up
4
to increase the size of the needle loop.