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.
     
    #1
  2. jj300

    jj300 Semi-Pro

    Joined:
    Feb 21, 2004
    Messages:
    617
    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.
     
    #2
  3. Gamma Tech

    Gamma Tech Professional

    Joined:
    Oct 12, 2004
    Messages:
    809
    Location:
    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.

    bret
     
    #3

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