Service manual

S-4000 TKF, LS Omron
1-41
Released 12/2009
e-mail: [e-mail]; [e-mail]; website: www.amfreece.com
Phone: [phone] (Service), [phone] (Spare Parts); Fax: [phone]
E - MACHINE ADJUSTMENTS
15. THREAD TENSION
The thread tension influences the appearance of the sewing. A thread tension change may be needed if
the thread and fabric change. Check to be certain all parts, which contact the thread, are smooth and
polished with no burrs or sharp edges.
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 By turning the tension knob ➊ clockwise, the thread tension increases.
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 By turning the tension knob ➊ anti-clockwise, the thread tension decreases.
NOTE: Too big thread tension can cause the unsightly appearance of the sewing when sewing on a
thin and elastic material.
1. Adjustment of the tension discs opening
The opening of the tension discs is performed in the last phase of the sewing. When the tension
discs are opened, it is possible:
a) to pull the thread from the spool when the draw-off lever ➋ receives the impulse for
operation
b) by decreasing or increasing of the air flow it is possible to regulate the tightening of the
last loop in the sewing