The speed of the caterpillar drive, which is controlled by the CX-1010, controls the diameter of the extruded product. If the caterpillar runs too fast the material stretches which results in a smaller diameter. If the caterpillar runs too slowly the material compresses and results in a larger diameter. The gauging system senses the diameter and gives a time delayed output to the CX-1010 to either speed up or slow down. This timed output typically makes partial changes to the setpoint in order to avoid hunting and overshoot. Because the stretch occurs near the extruder nozzle and the diameter is sensed after the cooling bath when the product has stabilised a time delay that is adjusted for line speed must be used to adjust the setpoint.


  • Consistent diameter
  • Wide speed range
  • Easy setup
  • Device net compatible