Stretch on first pulls

Discussion in 'Stringing Techniques / Stringing Machines' started by JasperJ, Dec 11, 2013.

  1. JasperJ

    JasperJ New User

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    Sometimes when stringing a soft/elastic multi, the string stretches too much to reach the desired tension on the first pulls. Do you guys keep pulling the string until it no longer stretches, do you pre-stretch, or would you prefer another technique?

    Thanks!
     
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  2. Irvin

    Irvin G.O.A.T.

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    That's never happened to me but I'm not using a drop weight and I assume you are. The more a string stretches the farther down the weight falls and the farther the weight falls past horizontal the less tension you will have.
     
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  3. JasperJ

    JasperJ New User

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    Forgot to mention that it's indeed about a dropweight machine.

    What would be the best way to handle this? Just keep re-pulling the string until the weight doesn't drop all the way down anymore?
     
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  4. Irvin

    Irvin G.O.A.T.

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    I wish I had more experience with a drop weight machine. If I had one I would work on trying to knowing what it takes to getting bar level as quickly as possible. As I string now I don't watch to see how much stretch there is in a string. It could be anywhere between .25 to 2" I have no idea. But one string will stretch the same every time. After that initial stretch of about 5 seconds there is very little if any stretching.

    Long story short you have to work on getting the bar level in about the same amount of time every time is you want consistency. Also using two clamps all the time would help a great deal.
     
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  5. JasperJ

    JasperJ New User

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    After the first 2 mains the stretch is pretty consistent for the rest of the string and the weight levels out quite nicely. The problem is that on the first 2 mains the string stretches so much that it takes about 4 pulls on the same string to get rid of the extra stretch and have the weight not max out all the way.
     
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  6. Irvin

    Irvin G.O.A.T.

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    Reminds me of a video made by YULitle where he suggestion pulling hard weaves twice. His reasoning though was not correct. If you have a constant pull it does not matter if you pull once or twice.

    String has memory and when you tension the string it wants to stay in the relaxed position and after the string is stretched it wants to say in the stretched state. Now I have to start assuming again but I don't knot what your using or how you start your mains.

    On your initial stretch of the center two main no portion of the string has been stretched before therefore it will stretch longer than all subsequent strings. When you tension a string you also prestreched the next string (that portion of string between the frame and the tensioner.) but on the first main there is no pure stretch.

    I would suggest on the first mains you tension the center mains and just let the weight drop as far as it wants for the first 5-10 seconds. Tension at this point is not relavent just let the string stretch. You may want to pre-run a few strings while waiting. Then string your racket normally.

    Depending on how you start your main you could also be part of the problem. I have seen where some stringers clamp the center two mains in the center of the racket and then tension the second main. IMHO that's a big mistake, because you have to pre-stretch the second main, half the first main, and half the two center mains together. It would be must better to use a starting clamp or a start pin to start those mains.
     
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  7. oest10

    oest10 Semi-Pro

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    Not that I think you are doing something wrong but do really good check on your clamps and any slipping in the tensioner. The first 2-3 mains the tension difference (since it starts from nil) is the biggest and in my personal "dropweight stringer" experience those are most prone to any slipping.

    If you are positive this is not the case (but 4 pulls?! Never seen that much play on a string) then youll want to start with the weight "more" towards the top, so that you lengthen the pull further. If you know it is going to take a big drop you should be fine starting from the top.

    If all of this is insufficient, prestretching will help you a lot!
     
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  8. oest10

    oest10 Semi-Pro

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    I think even with a CP tensioner the pulling twice technique does have its positives. The moment in between the two pulls, in which the string "loosens" up a bit will lower the friction for a moment and from there it may slide better through the mains on the second pull.
     
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  9. JasperJ

    JasperJ New User

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    I'm using a Stringway ML90 with flying clamps. I clean them regularly, as in every 4 rackets or so. I check the clamps for slipping the other day by marking a piece of string. I'll do that again and check the tensioner for any slipping aswell.

    I'm only really experiencing this problem with really soft strings like Wilson Sensation.

    What do you guys reckon is the better way to start the mains with flying clamps? Place 1 (starting)clamp on 1 main outside the frame and pull the other and then clamp it and so forth? Or the way YuLitle explains in his video where he pulls the first 2 mains and then puts a clamp on the inside of the frame as far away from the tension head as possible?

    http://www.youtube.com/watch?v=KO9qWaom4cg
     
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  10. Irvin

    Irvin G.O.A.T.

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    Both options are acceptable but the starting clamp method is much quicker, and does not clamp the center two mains two times just below the head of the racket. If shearing is a problem for you I would use the starting clamp method.

    EDIT: If you have a racket that start at the throat I would start with the first and second mains on one side and work to the other so I did not have the starting clamp on the head if the racket on a center main. That is where shearing normally occurs.
     
    Last edited: Dec 12, 2013
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  11. Tamiya

    Tamiya Semi-Pro

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    your string is slipping, Sensation has a waxy slippery outside.
    Usually gotta clamp mine nearly so tight it leaves white crush marks
    but it doesn't seem to hurt string's longetivity IMHO.
     
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  12. Muppet

    Muppet Hall of Fame

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    Irvin,

    I have been wondering for quite a while why I get so much power out of the sweet spots of my Dunlop 200 series racquets. I start my middle mains by pulling both at the reference tension (half the weight on each string.) I'd like to tone down my racquets' power. Do you think it would help to do a preliminary pull of both middle strings at the machine's maximum tension (78 lb) for about 10 seconds, then proceed as I have been at reference tension (varying between 48 and 58?)
     
    Last edited: Dec 19, 2013
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  13. Irvin

    Irvin G.O.A.T.

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    I'm not sure how you're talking about tensioning your strings but I would not pre-stretch the strings at maximum tension. This would put a lot of pressure on the racket and strings and depending on what type of strings you're using it could take all the life out of the strings.

    Raising tension will decrease your power but I would try using a less powerful string.
     
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  14. Muppet

    Muppet Hall of Fame

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    Thanks Irvin, I have some other strings I can try.
     
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  15. Irvin

    Irvin G.O.A.T.

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    You may want to start with full bed poly just to see what happens. You could also try raising the tension on your mainst up to 53-55 range with your hexy fiber hybrid.
     
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  16. Muppet

    Muppet Hall of Fame

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    Full poly is good on my Aerogel 200, but not on the MW 200G 95. But a hybrid is great on the MW. I tried raising the tensions on my signature setup to 50/55, but the Cyber Flash wore into the Hexy Fiber too quickly. Maybe I should change out my cross string for something else. I just received a set of Volkl Psycho 17 from TW, which I can try in the MW at 51/55. Do you think that's enough of an increase for Cyclone 17 @51, from Cyber Flash 17 @48, hybrided? I also have Mosquito Bite/Dunlop Pearl 17 that I plan to try in my Bio 200. I was thinking about 49/53, but maybe I'll go higher on that one too.
     
    Last edited: Dec 20, 2013
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  17. Muppet

    Muppet Hall of Fame

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    I'm switching over to the 'starting clamp on the second main' method for starting my mains. I often use very elastic multis and syn guts in the mains and this method looks like it will pre-stretch all of the mains as I go. Thanks for the vid Irvin.
     
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  18. Irvin

    Irvin G.O.A.T.

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    'Muppet' you're the only one that can tell what string and tension you need.
     
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  19. Muppet

    Muppet Hall of Fame

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    Irvin, do you have the link to that Youtube video of the 'starting clamp on second main' handy?
     
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  20. Irvin

    Irvin G.O.A.T.

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    I will look for it.
     
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  21. Irvin

    Irvin G.O.A.T.

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    Is this the one you're talking about?

    http://m.youtube.com/watch?v=mUqVqV...top_uri=/watch?v=mUqVqVz0oPk&feature=youtu.be

    I caught a lot of flack on that video when I introduced it. Let me give you a little history. I would rather not place a starting clamp on the outside of the racket at the head because you are putting a lot of stress on the string right where there could be shearing. So I started on the second string so the starting clamp is at the bottom.

    Just in case you're interested here is the thread I caught the flack in.

    http://tt.tennis-warehouse.com/showthread.php?t=458135
     
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  22. Muppet

    Muppet Hall of Fame

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    Not exactly the one I saw. Maybe it was a video with flying clamps. This was helpful though. But I tried crossing a clamp over to the other side unsuccessfully. But there's a way I can do it without crossing over. My only reservation is that it will be difficult to place the center mark on the string at what would ordinarily be the starting loop. But I can live with that.
     
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  23. Irvin

    Irvin G.O.A.T.

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    I have no idea what you're talking about.
     
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