| 摘要 |
In a warp knitting machine, the guide bars (1, 2, 3) can be adjusted in accordance with a pattern by means of racking motors (16, 17, 18) which obtain their racking data in the form of a given number of racking pulses from a pattern memory of a control device. In order to calculate and correct the position of the guide bars (1, 2, 3) of the warp knitting machine which is stopped in the lower position, each guide bar is connected to an indicator (20, 21, 22) of an electric proximity switch, the sensor (23, 24, 25) of which brought into contact with a measuring slide (26) which moves in the direction of racking of the guide bars. The measuring slide (26) is moved, by a measuring stepping motor (28), over the racking range of the indicator from a starting position corresponding to the zero racking position of the guide bar. A pulse sensor, which counts the steps of the measurement stepping motor (28) during this displacement until the indicator and sensor are covered, is provided. The result of the count obtained by this sensor is compared, by means of a comparator, with the number of racking pulses derived from the pattern memory which defines the displacement in accordance with the model. The difference calculated by the comparator is supplied as a correction pulse to the relevant racking motor (16, 17, 18). |
