Brother International EF4-B561 Service Manual - Page 29
Stitch, Length, Differential, Adjustments
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6. STITCH LENGTH AND DIFFERENTIAL FEED ADJUSTMENTS EI STITCH LENGTH ADJUSTMENT A desired stitch length can be selected by means of the scale on math feed arm 0 and the numerals on the scales of main feed arm and differential feed arm indicate stitch length in millimeters, but actual stitch length varies with the kind and thickness of the material and the differential fedd. Loosen 0 0 CD 0 Loose Cr' CD 02 O0 Procedures 1 Pull and open feed mechanism cover (B) e on the back of the machine. 2 Loosen nut Q. 3 Move feed ling indicator plate Q until its red mark is in line with that number on the scale which represents your desired stitch length. 4 Retighten nut CI securely. 2 DIFFERENTIAL FEED ADJUSTMENT Differential ratio produced by the movement of differential feed arm is to be dicided depending on normal stitching, stretching and shirring. Calculation method of differential ratio: Differential ratio - The scale on differential feed arm The scale on main feed arm * In case of the maximum stitch length in normal stitching refer below. Differential ratio 3.6 0 9 8 7 6 1 5 4 5 2 2 1 In case of normal stitching Set the scale on differential feed arm way as the scale on main feed arm 4). the same Differential ratio =!!=O.6 B 7 05 6 5 4 3 3 2 2 In case of stretching Set the scale on differential feed arm Q to a smaller number than that of the scale on main feed arm Q. - 27 -