What Is Film Force ? (film tension)

• Film force is the tension created in the film due to the films attempt to return to its original state after having been stretched.
• A rubber band is a good analogy.

Why Have Film Force ?

• A low film force inhibits the film from returning back towards its original state.
• Increasing this force will cause the film to stretch (post stretch).
  

How To Create Film Force ?

• Film Force is produced by creating a drag or tension between the load and the film carriage and can be produced both mechanically and electrically.
• Electrically reducing the film feed or speed of the film leaving the carriage compared to what the load demands increases the film force causes the film to stretch between the load and the carriage.
• Mechanically delaying the dancer arm which measures the speed demand of the load will reduce the film feed leaving the carriage which increases the force.