Operating instructions

Threading the bobbin

–

Insert a full bobbin into the bobbin case top, the bobbin must

thereby turn counterclockwise when the underthread is pulled off.

–

Guide the underthread through slot 6 under spring 7.

–

Depending on the desired buttonhole, the underthread must be

guided through slot 9 for a

raised-form

buttonhole (more thread is

pulled forward over the hook back)

through slot 10 for a

flat-form

buttonhole (less thread).

–

Cut off the thusly threaded underthread at knife 11.

Setting the underthread tension

–

Set the underthread tension by turning screw 12 so that the bobbin

case slowly lowers under its own weight with the thread end held

tight.

Inserting the bobbin case top

–

Place the bobbin case top with bobbin on the bobbin case bottom

taking care that bracket 5 can be heard to catch.