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.
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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.
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