Pfaff 645F Owner's Manual - Page 33

FINISHES Many of the finishing touches in a garment can be done by your machine - over casting seams, hemming, making buttonholes, sewing on buttons, and inserting zippers. SEAM EDGES Seam edges in fabrics that fray nust be stitched or "overcast" to prevent raveling during wear and washing. Press seam open and stitch each side separately. • Choose pattern stitch best suited for your fabric. • Adjust stitch length and stitch width to suit fabric. Choose sçtting that will give you the most open stitch and still secure the fabric edges. Avoid harsh, over-stitched edges which become stiff and show a ridge on right side of fabric. • Use one of two methods 1. Trim seam edges evenly and place stitching over raw edge - best for firmly woven fabrics. 2. Place stitching near edge of seam allowance and trim away excess fabric after stitching - best for fabrics which fray easily, lightweight fabrics, and knits which roll. OVERLOCK STITCH Machine Setting - Presser foot Stitch pattern Limit lever Stitch length Fabric feed Stretch stitch Overlock stitch combines a zig-zag stitch between two rows of straight stitches. It binds edge of fabric very well. When using Method 1, place stitches so outer row of straight stitches falls over edge of fabric. 31 - -