HIGHLEAD GC0618-1 D2 Instruction Manual Parts Catalog - Page 6
Browse online or download pdf Instruction Manual Parts Catalog for Sewing Machine HIGHLEAD GC0618-1 D2. HIGHLEAD GC0618-1 D2 13 pages. Heavy duty compound feed lockstitch sewing machine
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1 Well balanced
Fig 9
9 REGULATING THE THREAD TENSIONS
For ordinary stitching, the tension of the upper and the lower threads should be equal so as to lock
both threads in the center of the material. (1 Fig 9) If the tension on either thread is stronger than on
the other, imperfect stitching will be the result. If the tension on the upper thread is greater than that
on the lower thread, it will lie straight along the upper surface of the material. (2 Fig 9) If the tension
on the lower thread is greater than that on the upper thread, the lower thread will lie straight along
the underside of the material. (3 Fig 9)
1 ) Tension of the upper (needle) thread:
Before adjusting the tension of the upper (needle) thread, be certain that the presser foot is let
down but not in lifted position. To adjust tension, turn serrated nut (A Fig 8) on tension device
to clockwise to increase tension, while turning it to counter-clockwise to decrease it.
2 ) Tension of the lower (bobbin) thread: (Fig 7)
The lower (bobbin) thread tension is controlled by the larger screw (2 Fig 7) near the end of the
spring at the outside of the bobbin case. Turning this screw to clockwise to increase the thread
tension, while turning it to counter-clockwise to decrease it.
10 ADJUSTMENT OF THE PRESSURE
ON THE MATERIAL
The pressure of the presser feet is adjusted by the screw D (Fig 2) with screwdriver. To increase the
pressure, turn the screw to clockwise and to counter-clockwise to decrease it.
2 Upper thread strong
or lower thread weak
3 Upper thread weak
or lower thread strong