Abstract: A system for monitoring the percentage of stretch of a stretch wrap film in a stretch wrapping machine includes a first sensor associated with the stretch wrap roll and configured to generate a first signal as the film travels from the roll to the pre-stretch roller assembly, and a second sensor associated with the load and configured to generate a second signal as the film is wrapped around the load. A processor is operable to: a) calculate a pre-stretch length of the film based on the first signal during a time interval; b) calculate a stretched length of the film as the film is wrapped around the load on the rotating platform during the time interval; and c) calculate a percentage stretch of the film based on the pre-stretch length and said stretched length.

Abstract: A system for monitoring the percentage of stretch of a stretch wrap film in a stretch wrapping machine includes a first sensor associated with the stretch wrap roll and configured to generate a first signal as the film travels from the roll to the pre-stretch roller assembly, and a second sensor associated with the load and configured to generate a second signal as the film is wrapped around the load. A processor is operable to: a) calculate a pre-stretch length of the film based on the first signal during a time interval; b) calculate a stretched length of the film as the film is wrapped around the load on the rotating platform during the time interval; and c) calculate a percentage stretch of the film based on the pre-stretch length and said stretched length.