Knit fabric stenter frame machine technical requirements and control programs

- Dec 04, 2017-

Knitted fabric stenter frame machine is suitable for knitting fabric tenter processing, the main is to apply a certain degree of latitude in its weft, so as to eliminate the knitted fabric in the pre-treatment and dyeing process due to the tension generated by the larger Fabric edge uneven, weft skew, width and other shortcomings, to enhance its quality.


In addition to the knit fabric stenter frame machine treatment, but also play a role in stereotypes, only under the appropriate conditions of the knitted fabrics heated to the desired temperature and maintain a certain time, the fiber molecular chain in the new Re-adjust the position of the position; and then cooled at an appropriate speed, the fabric is heated to change the state fixed.


In order to ensure that the knit fabric stenter can make the fabric to the ideal state, some corresponding technical requirements are also proposed, for example, the left and right main chains on the device need to be synchronized in speed and position so as to avoid weft of the knitted fabric; meanwhile, Width control, amplitude modulation accuracy control within ± 2mm; the other can not ignore the system's temperature control and tension control.


In order to achieve the above requirements, knit fabric tenter frame the whole system uses a communication digital control to AC variable frequency drive-based; the main chain from the master, the use of encoder signal feedback, PLC from the main chain encoder for sampling and And the main chain encoder signal comparison, according to the feedback pulse difference to adjust the speed from the main chain, and then clear the master-slave pulse value, to avoid the cumulative error, in order to ensure the master-slave speed synchronization.


Knit fabric stenter frame machine, in addition to the cloth and the cloth side, each room also has a drying room width control; and in order to make the error within the craft within the process requirements, the use of encoder bidirectional control. In addition it's heating temperature directly from 8-way PT100 analog input PLC to get precise control.


In addition, the knit fabric stenter up-and-down over-frequency inverter external braking resistor, which can effectively avoid the negative over-feed energy consumption during braking caused frequent inverter failure to ensure that the machine can always be stable and reliable operation.