Thread Tension; Bringing Up The Lower Thread - Silvercrest SNM 33 C1 Operation And Safety Notes

Thread tension

1
2
3
A
B

Bringing up the lower thread

A. Upper thread tension
Basic upper thread tension setting: "AUTO"
To increase the tension, turn the dial to the
next higher number. To reduce the tension,
turn the dial to the next lower number.
1. Normal thread tension
2. Upper thread tension too loose
3. Upper thread tension too tight
Note:
The upper thread tension must be set at
2-3 when sewing the lightweight fabrics,
like silk and jersey etc.
B. Lower thread tension
Note:
The bobbin tension is adjusted correctly
during manufacturing, therefore no
changes are necessary.
To test the bobbin thread tension, the
full bobbin is placed in the bobbin case.
The bobbin case and gripper are then
suspended by the end of the thread. If the
tension is correct, the thread will unwind
by about 1.97 to 3.94 inch. when gently
swung and will then remain suspended. If
the full bobbin case unwinds, the tension
is too slack. If the tension is too tight, it
hardly unwinds or does not unwind at all.
To adjust, use the screwdriver (l).
Hold the end of the upper thread with the
left hand. Turn the handwheel (21) in the
anticlockwise direction until the needle is
again raised (a complete revolution).
Pull on the upper thread to bring the lower
thread up through the stitch plate hole. Lay
both threads to the back under the presser
foot.
Getting ready
US-EN 15