Arrangement in a sewing machine
    2.
    发明公开
    Arrangement in a sewing machine 失效
    VorrichtungfüreineNähmaschine。

    公开(公告)号:EP0366630A1

    公开(公告)日:1990-05-02

    申请号:EP89850270.3

    申请日:1989-08-25

    IPC分类号: D05B3/24 D05B27/22

    CPC分类号: D05B27/22 D05B3/24

    摘要: A measuring arrangement for measuring the real fabric feeding in a sewing machine consists of a wheel (18) which is rotated by the fabric without slip and is located on a special presser foot (12). There is a potentiometer (22) and a sliding contact (23) which gives a measuring quantity representing the rotation of the wheel when feeding voltage to the potentiometer and rotating the wheel. The measuring quantity is transferred to a computer unit in the sewing machine being able to calculate the feeding of the fabric positively or negatively. Such an arrangement will particularly be useful when it is desired to sew a buttonhole totally automatically.

    摘要翻译: 用于测量缝纫机中真实织物进给的测量装置由轮子(18)组成,该轮子由织物旋转而没有滑动并位于特殊的压脚(12)上。 有一个电位计(22)和一个滑动接点(23),当给电位计供电并旋转车轮时,该电位计(22)给出一个表示车轮旋转的测量量。 将测量量传送到缝纫机中的计算机单元,其能够正面或负面地计算织物的供给。 当希望完全自动地缝制纽扣孔时,这种布置将是特别有用的。