AMF S-4001 ISBH+I SM 30, Parts And Service Manual, Page: 26 / 90

S-4001 ISBH+I SM 30°
C - CORRECT USAGE
Released: 09/2017
E-mail: service@amfreece.cz; webside: amfreece.com
Phone: +420 582 309 146; Fax: +420 582 360 606
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3. THREADING
WARNING! Switch the main machine power off to prevent accidental starting of the machine. Disconnect the air
supply and dissipate any stored energy.
When threading, see the pictures below. Change the thread tension by nut 1 according to the sewing conditions. To
increase the thread draw off (for example sewing on the thin fabrics) there is an arm
2
installed on the thread draw
off lever.
The appearance and quality of the buttonhole may be affected by one or more of the following:
• clamping of the material
• bartack quality
• thread tension
• type of thread (size, etc.)
• sewing width
• sewn material (thickness, density)