Class 99 & 99K Sewing Machines - Sew-Classic.com

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To Regulate Pressure on Presser Foot Class 99 & 99K For ordinary sewing, the pressure of the presser foot on the material seldom requires changing. Heavy materials require more pressure than light weight materials. The pressure should be only heavy enough to prevent the material from rising with the needle and to enable the feed to move the work along evenly without side creeping. To increase the pressure, turn the thumb screw W, Fig. 25 clockwise or downward. To lighten the pressure, turn the thumb screw W so that it screws upward. FIG. 25 Thumb Screw for Regulating Pressure on Presser Foot Thread Tension For perfect stitching, the tension on the needle and bobbin threads must be heavy enough to pull the threads to the center of the thickness of the material and make a firm stitch, as shown in Fig 26. If the needle lies straight along the top side of the material, the tension on the needle thread is too heavy or the tension on the bobbin thread is too light, as shown in Fig 27. If the bobbin thread lies straight along the underside of the material, the tension on the needle thread is too light or the tension on the bobbin thread is too heavy, as shown in Fig. 28. FIG. 26 Perfect Stitching FIG. 27 Imperfect Stitching FIG. 28 Imperfect Stitching Page 22 Table of Contents | Previous Page | Next Page
Class 99 & 99K To Regulate Needle Thread Tension The tension on the needle thread can be tested only when the presser foot is down. The numerals "0" to "9" dial X, Fig. 29 indicate the different degrees of tension that can be obtained. The numbers do not denote size of thread or amount of tension. When the tension has been correctly set, note the number at the indicator line Y, Fig. 29 so that this setting may be regained should the tension be altered for special work. Fig. 29 To Regulate Needle Thread Tension To increase tension, turn the thumb nut Z, Fig. 29 gradually to the right (clockwise) until the required tension is obtained. Each higher number denotes increased tension. Page 23 Table of Contents | Previous Page | Next Page
Page 1 and 2: Class 99 & 99K Sewing Machines Inst
Page 3 and 4: Class 99 & 99K ELECTRICAL INFORMATI
Page 5 and 6: Class 99 & 99K If the Machine is El
Page 7 and 8: Class 99 & 99K If the Machine is Tr
Page 9 and 10: Class 99 & 99K To Oil the Machine a
Page 11 and 12: Class 99 & 99K Needles and Thread F
Page 13 and 14: Class 99 & 99K UPPER THREADING See
Page 15 and 16: Class 99 & 99K To Wind the Bobbin H
Page 17 and 18: Class 99 & 99K To Replace the Bobbi
Page 19 and 20: Class 99 & 99K To Start Sewing Be s
Page 21: Class 99 & 99K To Regulate Length o
Page 25 and 26: To Adjust the Needle Thread Tension
Page 27 and 28: Class 99 & 99K Insert the forefinge
Page 29 and 30: Class 99 & 99K To Replace Slide Pla
Page 31 and 32: Class 99 & 99K Page 31 Table of Con
Page 33 and 34: Class 99 & 99K Hemming (cont') ●
Page 35 and 36: Class 99 & 99K THE BINDER The binde
Page 37 and 38: Class 99 & 99K Binding Curved Edges
Page 39 and 40: Class 99 & 99K THE RUFFLER Occasion
Page 41 and 42: Class 99 & 99K Gathering (cont')
Page 43 and 44: Class 99 & 99K THE SEAM GUIDE The s
Page 45 and 46: Class 99 & 99K Skirt Zipper ● Mac
Page 47 and 48: Class 99 & 99K Corded Seams The cor
Page 49 and 50: Class 99 & 99K THE BIAS GAUGE The B
Page 51 and 52: Class 99 & 99K Joining Lace and Ins
Page 53 and 54: Class 99 & 99K THE ADJUSTABLE HEMME
Page 55 and 56: Class 99 & 99K DARNING OR EMBROIDER

Class 99 & 99K Sewing Machines - Sew-Classic.com

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