Differential transport

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The differential feed is a special function of overlock sewing machines .

An overlock sewing machine with differential feed has a feed dog that is divided in the middle. This creates two individual transporters, a front and a rear, which transport the fabric. You are sitting next to the presser foot . The front feed dog is responsible for feeding the fabric under the presser foot. The back one guides him behind the needles and back under the presser foot. As a rule, the differential feed is located as an adjustable hand wheel on the side of an overlock sewing machine. Because the speed of the front feed dog can be adjusted by turning. If you set the differential higher, the front feed dog becomes faster than the rear. Conversely, if the differential is set lower, it will slow down. With the standard setting, both conveyors run at the same speed. With the help of the differential, particularly fine fabrics or very elastic materials can be processed professionally. Stretchy materials often unwittingly curl when sewing. If the differential is set lower and the front feed dog runs more slowly, this prevents waves. The seam does not have to be ironed apart. Conversely, if desired, curling of stretchable fabric can be created as the differential is set higher. When processing very fine fabrics, puckers often occur. If this is to be avoided, the differential can be set higher. When the front feed dog runs faster, there is no puckering. Conversely, at a lower setting, curling can be created deliberately. You can often see this frizz on airy T-shirts or summer skirts.

Individual evidence

  1. ↑ Katrin Lünnemann: practical knowledge of overlock . Ed .: Oz Creativ. 8th edition. Christophorus Verlag, Freiburg 2015, ISBN 978-3-8410-6004-4 .
  2. ↑ Christelle Beneytout & Sandra Guemier: Sewing properly with overlock and coverlock machines . Ed .: Stiebner Verlag. Munich 2015, ISBN 978-3-8307-3007-1 .
  3. ↑ The Overlock: Basics and Components. In: allesnaehbar.de. Alles SewBAR, Melanie Bodes, November 23, 2016, accessed on March 15, 2017 .
  4. ↑ The overlock sewing machine. In: www.overlocknaehmaschine.info. Nicole Langer, accessed March 15, 2017 .
  5. ↑ Differential feed on sewing machines. In: www.handmadekultur.de. Consuendi GmbH, accessed on March 15, 2017 .