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  1. #1
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    Default 'Yonex Master Stringer' technique and knot

    I found this video of a 'Yonex master stringer'.
    He does a few things that surprise me.
    - He double pulls the first two mains, the last two mains and the first two crosses.
    - skips the 2nd last cross and then comes back to it after pulling the last cross

    Does anyone have any insight as to why he does these things?
    Also, what type of knot is he using?


  2. #2
    Regular Member Mark A's Avatar
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    Quote Originally Posted by mzc888 View Post
    He double pulls the first two mains
    Saves having a string jump from zero to full tension when the stationary clamp is released - a lot of breakages happen at this point.

    the last two mains
    No idea - you're going to lose tension from the knot, so why compound the problem by double-pulling? Could be a remnant from proportional stringing, I suppose.

    and the first two crosses.
    The YY stringers at the All England were doing this - reduces stress on the starting knot (but it's another thing I never do).

    skips the 2nd last cross and then comes back to it after pulling the last cross
    This is so he can tie off at the second-to-last main instead of A5 (as is usual). Yet another thing I disagree with.

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    uhhh..he cheats quite a bit when tensioning the mains..lolz still only lil shy of 15 mins cutting so many corners lolz xD

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    the last two mains
    No idea - you're going to lose tension from the knot, so why compound the problem by double-pulling? Could be a remnant from proportional stringing, I suppose.
    On high tensions i have often the problem, that the string is cutting into the frame (inside) on the last main (even if the grommets are in good condition), because the angle is the sharpest one. So if you string on 29 lbs with 20% prestretch (~35 lbs) the stress on the grommet and frame is a lot.
    On "higher" tensions (above 24 lbs) i always pull the last two mains...
    I tried a lot, but above 24 lbs it is the critical limit for some rackets (also yonex after some restrings on high tensions)...

    For example:
    Victor Light Fighter 7000 on 24 lbs with 15% prestretch
    Name:  lf7000.jpg
Views: 1199
Size:  29.3 KB

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    Regular Member Mark A's Avatar
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    Quote Originally Posted by Alex82 View Post
    On high tensions i have often the problem, that the string is cutting into the frame (inside) on the last main (even if the grommets are in good condition), because the angle is the sharpest one. So if you string on 29 lbs with 20% prestretch (~35 lbs) the stress on the grommet and frame is a lot.
    On "higher" tensions (above 24 lbs) i always pull the last two mains...
    I tried a lot, but above 24 lbs it is the critical limit for some rackets (also yonex after some restrings on high tensions)...

    For example:
    Victor Light Fighter 7000 on 24 lbs with 15% prestretch
    Name:  lf7000.jpg
Views: 1199
Size:  29.3 KB
    Makes sense, but I have never had a string pop on those grommets. Those are the areas where the string bends most, though.

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    Quote Originally Posted by Mark A View Post
    Makes sense, but I have never had a string pop on those grommets. Those are the areas where the string bends most, though.
    Thats not the problem! Look at the last main exactly. The String is cutting into the frame!

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    Regular Member Mark A's Avatar
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    Quote Originally Posted by Alex82 View Post
    Thats not the problem! Look at the last main exactly. The String is cutting into the frame!
    In which order do you do your last three mains?

    B9->B12->B10->knot, or
    B9->B10->B12->knot?

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    B9->B12->B10->knot

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    Regular Member Mark A's Avatar
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    Quote Originally Posted by Alex82 View Post
    B9->B12->B10->knot
    Hmm... bang goes that theory, then.

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    Quote Originally Posted by Mark A View Post
    Hmm... bang goes that theory, then.
    Which theory? Mine?

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    Regular Member Mark A's Avatar
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    Quote Originally Posted by Alex82 View Post
    Which theory? Mine?
    Mine - I thought you might have been doing 9-10-12, in which case the stress on that outermost grommet would have been increased even more.

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    Back to topic:
    What type of knot is that? Looks not so bad...

    And:
    and the first two crosses.
    The YY stringers at the All England were doing this - reduces stress on the starting knot (but it's another thing I never do).
    i do this if the tension is also over 24 lbs OR if i (must) make the knot on B7 instead of B6. For me it prevents that the starting knot sunks into the grommet and puts too much stress on the main string...

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    It might look bad, but providing the grommet is in good condition and well placed, it shouldn't be a problem. Not a lot you can do other than replace damaged grommets here.

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    Regular Member Mark A's Avatar
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    I think I'm going to try this double-pulling on the first two mains and see what effect it has on tension loss - if it's minimal (or, preferably, non-detectable), the safety gains will be worth it.

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    the plucking of the string is odd. it looks like he is trying to see if the tension has settled by listening to the pitch. which makes very little sense for 2 reasons:

    1. he is using a protech 8. tension will be spot on.
    2. the length of the string isn't constant due to the shape of the racket, the pitch will change slightly.

    or maybe i am reading too much into what he is doing and perhaps it is just a pointless habit?

    his weaving is slow. his 14mins string job would've been cut down by another minute if he can weave as fast as @kakinami , @Ah_Shum or Walter. using the thumb going backwards isn't gonna be fast enough, index finger moving forward is much more agile.

    having said that, there are a few similarities between his pattern and mine. looping back from cross top and the tie off point.

    the knot is the sausage bun knot that AK has demonstrated before.

    i really should do a video of my current flow. it has evolved quite a bit since i last made a video!

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    just to clarify on the weaving. his main weave is fast. sub 5 mins, but the cross is slow. nearly 10 mins. usually the ratio is around 1:1.5, but his is almost 1:2

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    Quote Originally Posted by Mark A View Post
    I think I'm going to try this double-pulling on the first two mains and see what effect it has on tension loss - if it's minimal (or, preferably, non-detectable), the safety gains will be worth it.
    I don't have fixed clamps (I use a starting clamp outside the frame) so i don't think i have this problem ... but from what i can work out, wouldn't it be better to clamp main a1 at the top, then pull b1 at the bottom (so you pull through the top centre grommets) and clamp. Then pull b2, and move that bottom clamp to the top (now both clamps are next to each other). Finally pull a1, but as the tension head takes up the slack release the clamp so that the entire length of the string gets the prestretch.

    That way, all of the centre main strings get the same pull, the same prestretch, and (most importantly in my view) are all clamped the same distance from the frame.

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