| 摘要 |
The control device according to the invention includes: a. a photoelectric cell 6 situated square with the needle plate 1, and preferably built into the latter, upstream of the sewing head 2 and capable of detecting the presence of the sewing-work 7; b. a sensor for counting the revolutions of the balance wheel of the sewing machine, preferably an inductive proximity sensor; c. an electronic circuit, connected to the extractor 4, the photoelectric cell 6 and the counting sensor, programmed so as to control the operation of the extractor 4 on the one hand during a first programmed number of revolutions of the balance wheel recorded by the sensor after the start of detection, by the cell 6, of the work 7 and on the other hand during a second programmed number of revolutions of the balance wheel recorded by the sensor after the end of the detection, by the cell 6, of the work 7. <IMAGE>
|
