Bernina 531 Manual - Page 38
Darning
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3. Attach button presser foot marked by 2 black lines on its shank and place button under foot according to Fig. 46. 4. Adjust zigzag stitch width according to the distance between the stitch holes in the button and sew button on with 6-8 stitches. 5. To fasten the stitches, leave needle in the hole of the button. Lift the presser foot. turn zigzag knob 12 (Fig. 2) to zero, lower foot and fasten with several stitches. With four-hole buttons, shift the cloth with the button and make 6-8 stitches in the second pair of holes. Press-studs and hooks are sewn on in like manner. Darning with wool When darning with wool, use the patented wool-darning foot. Proceed as follows: 1. Lower feed dog by turning knob 17 (Fig.2) to the right until darning symbol appears. 70 Fie. 47 2. Set stitch regulator 15 (Fig.2) to zero to a • prevent lowered feed dog from being operated unnecessarily. 3. Set zigzag knob 12 (Fig.2) to 3-4. For top and bottom thread, use darning cotton. Wool is employed to cover the damaged area. Use top and bottom threads and darning wool of a colour corresponding to the piece to be mended so that the darn will be as invisible as possible. Thread tension is the same as in ordinary darning. Woollen socks are pulled over the free arm; the darning ring for stockings is not employed. Darning with wool is performed in two stages: 1. The damaged area is covered with wool rows. 2. The rows are sewn down.