Warp Beam Tension Balancing in High Gauge Tricot Knitting
Balancing high gauge tricot warp beam tension within narrow cN per tex bands eliminates fabric weight drift and dynamic horizontal streak defects across bulk runs.
Spring Bar Sensor
Monitoring Device
A tension-measuring instrument that uses a flexible metal bar to detect changes in yarn or fabric tension is deployed on high-speed weaving and warp knitting machines. This tool, known as a spring bar sensor, provides continuous real-time data to the machine control unit.
Signal Generation
The bending of the metal bar under tension is measured by strain gauges or optical sensors. As the yarn sheet exerts force on the bar, the spring bar sensor translates this mechanical displacement into an electrical signal. This signal is proportional to the yarn tension and allows the system to identify sudden load spikes.
Process Control
Automatic adjustments to the let-off or take-up drive are triggered by the sensor output. If the tension exceeds the set limits, the controller adjusts the feed speed of the warp beam to maintain uniform yarn tension. This real-time correction prevents yarn breakages and ensures consistent loop or pick structure in the fabric.
By smoothing out tension variations during start-up and high-speed operation, the sensor reduces the occurrence of stop-marks and structural defects in the finished cloth.
Maintenance Standard
Periodic calibration of the tension-sensing system ensures that the readings remain accurate. Dust and yarn residues must be removed from the sensor to prevent signal drift during long production runs.