TC

Tube Control
 
The system TC has been designed for control 
and stabilization of diameter and wall thickness at tubing lines.

Tasks

  • Identification of control parameters
  • Filter of the readings
  • Computation of the output signals for        blowing pressure and drawing speed
  • Control of diameter and wall thickness 
  • Graphic display of diameter, thickness,  pressure and speed trends
Structure

The system is based on a 32 bit processor with software for signal processing and control, control signal output to the blowing air equipment and to
the drawing machine as well as a touch screen terminal for operation and graphic display.
 

Specifications
 

  • Digital PID controller for control loops with     dead time
  • Two channel controller
  • Filtering of readings
  • Automatic adjustment of the controller
  • Cycle time 100 milliseconds


Operation
 

  • Operation using the touch screen terminal
  • Display of the trends
  • Display of the status of controller and   measuring device
Benefits
  • Long-term oscillations of the tube       dimensions are compensated. The          average of diameter  and  wall thickness            is stabilized on the set value.
  • The quantity of tubes within the tolerances          is increased considerably.

Diameter in two axis and thickness 
at three points are measured in the 
hot zone of the tubing line.
 
 


The average of the diameter is stabilized by the controller.
 
 


One day trend of diameter, before and after turning on the controller.