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special_solutions_graphic (9K) ASD has extensive experience in writing special application software & designing custom hardware for automation systems. We provide one stop shopping solution for all your automation needs.

Web Handling

Here are some of the Industrial Automation Web Handling applications that ASD has experience in Designing, CAD drawings & Documentation, Programming, Sizing and Selection of Components, Start-Up and Commissioning Services.
Also click here Products/Control Panels for more information on Web Handling Electrical Control Panels

Web Speed & Tension Control

Paper Sheet Plastic Casting & Chemical Treatment Line Master/Slave Speed control & Web Tension control

click to enlarge In this application a thin film of special plastic compound is cast on a paper sheet web and then treated with chemicals. Precise tension and speed control is crucial in achieving the required web thickness, composition and smooth winding. Driven Rolls 2 &3 follow master Driven Roll 1 with PID trimming control based on Load Cell tension feedback. Dual winder controls enable the operator to change rolls without interrupting the line operation. The Payoff has a pneumatic controlled brake that is controlled by a Load Cell tension controller to achieve steady payoff with the required web tension.


Form, Fill & Seal Machine Master/Slave Speed control & Web Tension control

click to enlarge Form, Fill & Seal Machines perform a continuous process which converts a roll of flat plastic sheet into filled and sealed plastic bags. Plastic sheet is fed into the machine from a roll. These rolls vary in size but are typically 13 to 18 inches in diameter and weigh 75 to 100 pounds. There are differing tensioning schemes. Tension feeds usually have drag applied to the roll hub. This gives resistance to the pull roll(s) to keep the film taunt. Peripheral equipment may be used to perform auxiliary functions to the plastic web, such as printing, installing a plastic zipper etc.


Other Web Handling Applications that we have worked on
  • Pulse follower speed control
  • Dancer Tension Control
  • Load Cell Tension Control
  • Tension Control with PID Speed Trim
  • Web Alignment control with Edge guides
  • Web Thickness Measurement with Laser Displacement Sensors. Click here Products/Measurement/Web Gauging systems for more details
  • Web Cut-to-length Control


    Winder Web Tension Control with Dancer arm

    click to enlarge Tension control is achieved by the integral PID Trim function of an AC Flux vector drive. This PID Trim function is used to control dancer position by sensing arm movement and trimming drive speed. Tension is adjusted by changing the load on the dancer arm (usually by means of a low friction air cylinder or balance weights). This method of control can be used in center winders, between nip rolls or with a surface winder.


    Winder Web Tension Control with Load Cell

    click to enlarge Tension control is achieved by the integral PID Trim function of an AC Flux vector drive. This PID Trim function is used to trim the drive speed based on Load Cell Tension feedback. This method of control can be used in center winders, between nip rolls or with a surface winder.


    Winder Web Tension Control with Ultrasonic Position Sensor

    click to enlarge Tension control is achieved by the integral PID Trim function of an AC Flux vector drive. This PID Trim function is used to trim the drive speed based on Web slack feedback signal from the Ultrasonic Position Sensor. This method of control can be used in center winders, between nip rolls or with a surface winder.



    Other Winder Applications that we have worked on
  • Turret Winder Controls
  • Sensorless Constant Tension Center Winder Controls
  • Pay-Off/Take-Up Speed and Tension Controls
  • Taper Tension Control
  • Tension Control with Diameter Compensation

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