typical GC6760 SERIES, Руководство по установке, инструкции и обслуживанию

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TYPICAL GC6760 Series
10 // ADJUSTMENTS
10/2 Adjust the take up spring
The pre-set position of the take up spring (1) is 6 to 8 mm
(4 to 6 mm for the specification H) above the upper edge of
the thread guide when the sewing foot is lowered.
1. Lower the sewing foot (1)
2. Loosen the set screw (2)
3. Turn the holder for the thread tension (3) to
adjust the position of the take up spring.
4. Tighten the set screw (2)
Take up spring strength:
The pre-set strength of the take up spring (4) varies
depending on the version of the machine.
M: 0.25 to 0.35 N
H: 0.30 to 0.5 N
5. Hold the upper thread above the tension knob tight and
pull with the thread from the left side the take up spring
(4) to the same height than the lower edge of the thread
guide (5). Measure the strength of the take up spring now.
6. Push a screw driver in the slot of the tension stud (6) and
turn, to adjust the strength of the take up spring.
When you use a tension measuring device (7) (optional extra)
you can see the reading on the scale on the side of the red line.
Scale
(H): 4-6 mm
(M): 6-8 mm
(M): 0.25 to 0.35 N
(H): 0.30 to 0.5 N