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Resumen del manual
74). b) Different .seam patterns combined t<>-gelhcr (see fig. 75). Fisc. 75 Ornamental automatic stitches with two needles (see fit'. 761 Zigzag stitches arc equally possible when sewing with two needles. However, make sure on principle that the two needles are not displaced further than allowed by the elongated hole in the stitch plate. Needle throw plus distance between needles equals width of elongated hole. When a double needle with Vat" needle distance is used, the stitch width may not exceed V«i" as a maximum. Naturally ornamental stitches made with two needles may also 1>k modified by altering' the material feed and by thread selection of two colours. Flu. 7« THE ORNAMENT INDICATOR The BEItNINA-Record of the Model 730 and 731 has been equipped with a novelty, the ornament indicator, showing the actual position of the ornament being stitched. At the front side of the arm, to the right, near the tension sight hole, another sight hole has been managed, which is filled with a mark. Now, when the machine is sewing an ornament, the ornamental stitch symbol is moving inside the machine and passes this sight hole, where it can be seen (see fig. 77). Even when operating the machine at great speed, this symbol can be clearly observed when it passes Fitr. 77 5« through. As soon as the front end of the ornamental stitch is cutting the mark, the machine begins to stitch a new ornament. When one half of the ornament has passed the marked sight hole, thi3 means that half of the ornament has been stitched. With this marked sight hole it is now possible to notice the moment when the machine is beginning to sew said ornament. This device will be of great importance when sewing ornaments of which only one single ornament has to be stitched and placed within a certain area. Tt will also be of value when changing an ornament altogether. Fije. 78 Blindstitch sewing Blindstitch sewing means sewing together two pieces of cloth, the upper one being folded and sewn to the lower one in such a manner that the seams are invisible on one side. Such work is performed with the blindstich foot (see fig. 78) which possesses an elastic cloth guide between the fingers on its base, but otherwise is identical with an ordinary presser foot. Blindstitch sewing can be accomplished with the ordinary zigzag stitch or by means of the built-in blindstitch cam. 1. Setting of machinc when sewing with ordinary zigzag stitch a) Attach blindstitch foot. b) Deflect needle to right position. c) Set zigzag knob th a stitch width between 2 and according to thickness of material. d ) Set stitch length regulating lever to stitch length -1. el Set feed dog reversible knob on “ sewing" symbol. 57 © Blindstitch foot (No. 55068203) © Left position of needle stitch © Folded upper pie«- of material © Needle plate © Material stop and guide © Right position of needle stitch 58 o o After having threaded the machine, put the lower flat piece of cloth underneath the blindstitch foot; then place the upper piece of material on top and fold it in such a way that it always touches the elastic guide; lower the blindstitch foot, and start sewing. The zigzag stitch width should be adjusted in such a way that in its left deflection the needle is stitching through the middle of the folded piece of material, which will make the seam invisible on the upper piece of material when flattened. Said stitch width is between 2 and :i, depending on the thickness of the cloth used. 2. Adjustment of sewing machine for sewing with the blindstitch cam Whereas, when blindstitching with the normal zigzag stitch, the folded piece of material is pierced after every second stitch, when using the blindstitch cam there are five straight plain stitches between each piercing of the folded piece of material. Thus the machine should be adjusted as follows : a) Attach blindstitch foot. b) Connect automatic device by means of lever 13 (see fig. 2 and 72) backwards. c) Set lever 12 on blindstitch cam (1). d) Set needle into right position of stitch. e) Set, zigzag knob 18 to a stitch width between 2 and 3, depending on thickness of material. f) Set stitch length regulation lever 22 on a stitch length of 2, 3 or 4, according to kind of cloth. g) Set feed dog reversible knob 23 on “sewing" symbol. The biindstitching itself is made exactly as has been described under 1. Pintucking Fig. 80 The complete pintucking attachment comprises the following parts: 3 double needles for pintucks of approximately Vim", Vs" and ■•hi". 3 pintuckers with 3, 5 and 7 grooves. VVheu preparing the machine for pintucking, proceed as follows: 1. Set needle to centre position in stitch hole by adjusting grip 17 (see fig. 2) in the middle. 2. Set zigzag stitch lever IS (see fig. 2) upon zero position. 3. Remove standard needle from needle bar and introduce a double needle, proceeding by the way as width a standard needle. 4. Attach the pintucking foot corresponding to the...
Otros modelos de este manual:Máquinas de coser - 731 (3.69 mb)
Máquinas de coser - 730 (3.69 mb)