Web handling fundamentals.
Plain explanations of the control systems that keep a roll-to-roll line running straight and stable: what each system does, how it works, and what has to be known before choosing one. Written for engineers meeting these systems for the first time, and for anyone specifying one.
Lateral web position: how it is measured, why it drifts and how it is corrected.
The closed control loop explained from first principles: why the web drifts, what the sensor, controller, actuator and guide frame each do, the difference between edge, center and line guiding, where the guide goes on the machine, and what to check before specifying one.
Read the GuideOnce the fundamentals are clear, these articles go into specific selection and troubleshooting questions.
Ultrasonic, infrared and CCD detection compared against material transparency, edge condition and machine section.
Ultrasonic vs Infrared SensorsHow the controller, edge sensor and actuator form one loop, and the compatibility checks to make before buying them separately.
How the Loop Fits TogetherWhen a complete integrated guide frame is required and when separate components are enough.
Frame vs ComponentsWhat unwind guiding and rewind guiding each correct, and when a line needs both.
Unwind vs Rewind GuidingGuiding position, sensor type, actuator stroke and installation conditions for slitter rewinders.
Guiding for Slitting MachinesIntegrated units and matched component packages for narrow-web label printing and finishing lines.
Guiding for Label MachinesLongitudinal web tension: how it is measured, what goes wrong when it is unstable, and how it is controlled.
Why a constant brake torque does not give constant tension, how load cells measure force and why wrap angle matters, the difference between open loop and closed loop, taper tension at the rewind, and how to arrive at a defensible tension setpoint.
Read the GuideWrinkles, web breaks, unstable winding and registration error traced back to their tension causes, with the selection data needed to fix them.
Read ArticleStatic generation on moving webs, where it causes problems and how it is removed or applied.
Static source, material, web width, line speed, installation distance, and when detection is worth adding.
Read ArticleHow to tell static-related dust attraction apart from surface contamination, cutting dust and process debris.
Read ArticleSend the web path, material, width range, line speed and the machine section you want to control. KENDORIC will review the application and come back with a practical configuration.
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