Pfaff 645F Owner's Manual - Page 9

NEEDLES AND THREADS The needle and thread you choose depends upon the fabric you are stitching. The correct needle size is important to avoid damaging the fibers of light weight or tightly woven fabrics, and to prevent needle breakage when stitching heavy or stiff fabrics. Needle si. ze - iiireau . polyester • cotton covered polyester fine • fine mercerized cotton (70-100) • silk A 11 light . polyester • cotton covered polyester • mercerized cotton (50-60) • silk A 14 medium • polyester • cotton covered polyester • mercerized cotton (50) • silk A 16 heavy • polyester • cotton covered polyester • mercerized cotton (40-50) • heavy duty mercerized (40) • silk D (buttonhole twist for top- stitching) Fabric tricot, lingerie fabrics, chiffon, net, voile, sheer lace, fine silk, organdy light weight knits, jerseys, silk, batiste, taffeta, satin, lace, crepe double knits, linen, poplin, gingham, pique, seersucker, fine corduroy, velveteen, light weight wools heavy wools, corduroy, felt, terrycloth, canvas, upholstery and drapery fabrics Use only No. 15 x 1 (705) needles in this machine. • Always use same type and size of thread in both needle and bobbin. • Always use a sharp needle. A blunt point can cause skipped stitches or snag the fabric. Chemical finishes and man-made fibers blunt the needle faster. • Never use a bent needle. • If your machine is skipping stitches, replace the needle before looking for trouble elsewhere. Ball Point Needles are designed to sew knits and stretch fabrics. The ball point tip can slip between the fabric threads, while the point of an ordinary needle may damage the fibers. Available in size 9, 11, 14, and 16. -5--