Pre Stretch

Discussion in 'Stringing Techniques / Stringing Machines' started by D Wilson, Jan 14, 2007.

  1. D Wilson

    D Wilson Guest

    I have a 5800 Gamma stringer and I was wondering how does the pre stretch button work.
  2. jj300

    jj300 Semi-Pro

    Feb 21, 2004
    assuming you select a percentage, ex 5%. The machine will pull 5% over your tension, for example if you set your tension at 60lbs, the machine will pull 60lbs +5% and it will then drop down to 60lbs again, and let you know that the pull is done. many stringers avoid the machine prestretch because it is not considered a "true" prestretch. A true prestretch involves stretching the entire string length at once so the prestretch is even across the entire length of the string. A machine prestretch works on every pull and therefore some lenghts of string will be prestretched twice.
  3. Gamma Tech

    Gamma Tech Professional

    Oct 12, 2004
    Pittsburgh, PA
    just to clarify this point (and D Wilson you can verify with a scrap piece of string) the machine would pull to 63lbs in this cases and then it completely releases the tension and re-pulls to 60lbs.


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