Automatic gauge control

Benchmarks for Profile Control Systems

  • Time between switching on the profil control system and having the profile distribution at the half start-up sigma value
  • Minimal achieved sigma value
  • Ability to quickly adapt to non predictable changes in the process

Needs to fulfill the Benchmarks

  • The thickness gauge and the profile control system must be perfectly lined-up in machine direction
  • The basic centration of the die must be as good as possible
  • Take care that profile variations are a combination of Machine Direction (MD) variations and Transverse Direction (TD) variations. The Profile Control System can be effective to reduce only TD variations. Hence to get a flat film, MD variations should be also reduced.

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