Silvercrest SNM 33 A1 Service Manual download pdf (Page 14)

Thread tension

Note:

Lower thread tension

Upper thread tension

The bobbin thread tension does not normally have to

be adjusted.

To test the bobbin thread tension, remove the bobbin

case and bobbin and hold it by suspending it by the

thread. Jerk it once or twice. If the tension is correct, the

thread will unwind by about an inch or two. If the tension

is too tight, it does not unwind at all. If the tension is too

loose, it will drop too much. To adjust, turn the small

screw on the side of the bobbin case.

Basic thread tension setting: "AUTO"

To increase the tension, turn the dial to the next number

up. To reduce the tension, turn the dial to the next

number down.

A. Normal thread tension

B. Upper thread tension too loose

C. Upper thread tension too tight

Bringing up the lower thread

Hold the upper thread with the left hand.

Turn the handwheel forwards until the needle is raised.

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.

Silver Crest SNM 33 A1

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Silvercrest SNM 33 A1 Service Manual Page 14