Problem with head compressed after strung

Discussion in 'Stringing Techniques / Stringing Machines' started by Shangri La, Jul 28, 2011.

  1. SteveI

    SteveI Legend

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    Hi,

    I was tracing the outline of the head before and after string. It was very clear that the head was rounding out. Not to mention the frame's overall length was 26.75 (Radical 1998 version) after stringing. The one that really hit me was the Dunlop MW 200G 100. I had that I picked it up brand new and was strung by my local ProShop. The other I had been stringing. The new one was 27.50 (Correct Spec). Mine were coming out 27.25 and the head looked like an O/S. I cut the strings out of the one I had strung.. and it came back to 27.50. The Head Pure Competition was the other model that had major Head Compression. That model was a Twin Tube and 21 mm beam.. flex was about 55 or less. Very soft frame.
     
    #51
  2. djdannyj25

    djdannyj25 New User

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    Hey guys, I've been stringing racquets for a couple of years and my APDGT has a length 26.4 now... None of my other frames have shrunk at all, but this is a little scary to me. The head is a lot more circular than my other APD's. I'm using a Klippermate.

    When you guys are saying stretch the frame, what do you mean by that exactly?

    Also, how do you properly mount a racquet? Like do I try to tighten a lot, or just enough to make sure it doesn't move? When I mount I usually mount the racquet tight enough so it doesn't move, but that obviously is not working.

    I've been searching these forums all night for a good answer and have not found anything that everyone agrees on.

    Any good advice guys? I really don't want this to happen to another one of my racquets.
     
    #52
  3. Irvin

    Irvin G.O.A.T.

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    I have nev used a KM but I would pull the top or bottom support from the bottom to make sure there was no play and measure the racket when mounted it should be 27".
     
    #53
  4. djdannyj25

    djdannyj25 New User

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    I've been remeasuring, and it turns out that my racquet is probably 26.8 or 26.9 inches long. The head is still noticeably wider though.

    Any other general information about mounting you can give me? I want to make sure I never have to worry about such a problem from developing. :D
     
    #54
  5. Irvin

    Irvin G.O.A.T.

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    No the supports just need to be tight enough to hold but not so tight you would strip the threads.
     
    #55
  6. djdannyj25

    djdannyj25 New User

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    Okay thanks for the good advice. :D
     
    #56
  7. taurussable

    taurussable Professional

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    crosses tighter than main to reduce compression kills the feel of the stringbed..
     
    #57
  8. Roadway

    Roadway Rookie

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    i care much about racquet deformation indeed. before very stringing i measure the hoop longitudinally and latitudinally. i use 6-pointed machine. if the mains and the crossess are in the same tension, the HEAD racquets (graphite edge and graphite edge TXE) become a little wider while the WILSON racquets (PS85) become a little narrower. in oder to compensate these i always string the crosses 2 kilos higher in HEAD and 2 kilos lower in WILSON.
     
    #58
  9. TheLambsheadrep

    TheLambsheadrep Professional

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    I've looked for posts and other info about stretching racquets to compensate for deforming, is there a visual example I can find anywhere?
     
    #59
  10. anubis

    anubis Hall of Fame

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    I have an inexpensive 2 point system. I have strung over 50 racquets on it and I still get deformation, it averages 1 cm difference length wise. I even get that if string crosses 4 lbs tighter. Doesn't matter if its a Head or a stiff Babolat. It still compresses by 1 whole cm
     
    #60
  11. Irvin

    Irvin G.O.A.T.

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    Measure you head height without strings, mounted, after you pull the first center mains and at various points in the process to id entry when and why your are losing that cm.
     
    #61
  12. BigEleven

    BigEleven New User

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    1 cm is quite a lot. What machine is yours?

    So far I have strung three rackets on my x-2: fischer pro #1, Yonex RDS 001 Mid, and a babolat PST Ltd. The fischer and Babolat were both shorten by about 0.5 cm while the Yonex was intact.

    I am pretty sure all the rackets were set up securely the same way on the stringer but have no idea why and how to prevent the deform.

     
    #62
  13. Irvin

    Irvin G.O.A.T.

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    This is rocket science guys the racket is shorter. So is the top / bottom of the mounts moving, or both? If they aren't the racket is slipping in the mounts.
     
    #63
  14. struggle

    struggle Hall of Fame

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    no, it is NOT rocket science. it's poor mounting and/or stringing technique. nothing more, nothing less.

    not trying to slam the OP, but it's really pretty simple. a well mounted frame will not distort (much) due to stringing.
     
    #64
  15. Irvin

    Irvin G.O.A.T.

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    Yes but I think the OP will be on his way to resolve the problem if he can identify the problem.
     
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  16. TheLambsheadrep

    TheLambsheadrep Professional

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    Anything guys?
     
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  17. Irvin

    Irvin G.O.A.T.

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    I just strung a head radical after string the mains it was compressed 5/16" stringing multi @ 56 lbs. After string the poly crosses @ 53 lbs it finished up 1/16" short. That is with normal tightening of the racket without stretching the frame to begin with.
     
    #67
  18. TheLambsheadrep

    TheLambsheadrep Professional

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    Yes, and it wasn't until recently that a stringer did that to my twin tube radical tours. Also, when I bought them about 6 years ago, I opted to have them strung before they were shipped and when they arrived they were quite circular. At the time I didn't know they weren't supposed to be like that.

    But like I said, a recent string job left one of my radicals pretty compressed. I have seen that you and others have talked about stretching racquets in other threads, but I can not find a thread/post devoted on explaining how to do it properly. If it's out there and I missed it, I apologize. I am a visual learner though, so if there could be a video made about this I wouldn't complain :) . All your other videos have been very helpful Irvin, thank you
     
    #68
  19. Irvin

    Irvin G.O.A.T.

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    I don't know there is a proper way to stretch rackets. If I were compressing a racket a little bit I may be inclined to stretch it a little bit to getting the right end result but you are talking about 1cm. That is not a little bit that almost 1/2".

    I used to string on a old stringer that had a rod that was placed at 3 & 9 while stringing to hold the sides in while the mains were strung. Maybe you could use scrap string to do the same thing. The first thing I would do is find out how and when it is compressing and work from there.

    All you higher end machine move the posts from the bottom (with micro adjustments at the top) when mounting rackets. You turn knobs connected to a threaded rod the move the supports in and out. You can try to do the same thing. Mount the frame and pull the mounting support from the bottom. This will help to pre-load the support by removing any lateral movement while you tighten the post.
     
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  20. Cfidave

    Cfidave Professional

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    That is exactly what I get on Radicals, after stringing at similar tensions. I have done them on 2 point mounts ( Prince ) and 6 point mounts. They always seem to come out that 1/16" short. I have not seen this on other racquets, although I don't check every single time. I don't believe it is the mounting system or mounting error.
     
    #70
  21. anubis

    anubis Hall of Fame

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    I don't know about the OP, but my issue was that the stringing machine just wasn't robust enough to withstand the pressure of the mains.

    Case in point, two days ago I strung a Babolat APD with 17g poly @ 50 lbs. Hoop compressed lengthwise by a full CM.

    yesterday, I picked up a used Gamma 4000 crank machine. After getting it all cleaned up (still need to calibrate it), I cut those Babo strings out and re-strung it. Same strings, same tension. This time, the hoop only compressed by 1 mm.

    IMO, it's not the stringer, it's the machine. I didn't do anything different, I just used a different machine.

    And BTW, crank machines are AWESOME compared to dropweights. so much easier. The whole job only took me 45 minutes, and I was VERY slow, as I was still learning how to use this machine (never used a crank before). I'm thinking that once I get proficient at it, I could probably string a racquet in about 30 minutes or so.
     
    #71
  22. Irvin

    Irvin G.O.A.T.

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    I think it's the stringer's experience and not the machine. I just can't see every racket strung on these lower end drop weights are compressed. There must be a solution.
     
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