Stringbed frequency to monitor string tension

Discussion in 'Badminton String' started by visor, Feb 27, 2013.

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  1. visor

    visor Regular Member

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    Lol... 600 Hz?! Assuming linearity down that low and 30 Hz is equivalent to 1 lb, I'm guessing 10-12 lbs even!
     
    #261 visor, Feb 24, 2015
  2. craigandy

    craigandy Regular Member

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    I guess .75mm at about 18lbs.
     
    #262 craigandy, Feb 24, 2015
  3. craigandy

    craigandy Regular Member

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    30hz per pound where is that coming from. That would mean a 1200hz string job would be 40lbs!
     
    #263 craigandy, Feb 24, 2015
  4. blableblibloblu

    blableblibloblu Regular Member

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    ^not starting at 0hz...
     
    #264 blableblibloblu, Feb 24, 2015
  5. visor

    visor Regular Member

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    That's right... Here's a single string measurement that kwun did a while back on ZM62. As you can see, quite linear in the range we're interested in... 1 lb equivalent to 30 Hz.

    And these measurements match quite well with my experience with several good stringers.

    NB: these are more representative of stabilized frequencies, ie not right off the machine.

    uploadfromtaptalk1424809081273.png
     
    #265 visor, Feb 24, 2015
    Last edited: Feb 24, 2015
  6. bdave

    bdave New Member

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    Thought I'd share the stringbed frequencies I've been calculating for a while now. Especially if someone somewhere compiles these globally! I think it's a very good indication of consistency for my stringing jobs, and also, it helps to figure out approximate tension of stringbeds when someone asks how much it is.

    All of these were taken right off the machine (klippermate m140)
    Mains are always 1lb less than written tension, crosses 1lb more (ie 23 is 22x24)

    Here is the Excel doc: https://www.dropbox.com/s/ch3wxap58lnef2r/strings.xlsx?dl=0

    David
     
    #266 bdave, Feb 24, 2015
  7. craigandy

    craigandy Regular Member

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    Yeah thanks I have seen that. So how did you arrive at 10-12lbs?
     
    #267 craigandy, Feb 24, 2015
  8. visor

    visor Regular Member

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    Well, my experience with BG65(0.70mm) @ 24lbs is 975 Hz, so 375/30= 12.5 lbs lower.

    Of course, a 0.75mm factory string would be around 2 lbs more...
     
    #268 visor, Feb 24, 2015
  9. craigandy

    craigandy Regular Member

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    Ah I see thanks.

    I just was wondering since in my experience 28lbs is about 1200hz in bg65 .70 and 24-25lbs bg66um .65 is about 1200hz. So that would suggest 3 or 4lbs difference per .05mm guage increase.

    Given that 28lbs in .70 is about 1200hz, mater got 600hz which is half that, so gives you 14lbs then add on .05mm gauge(probable cheap racket gauge) gives you 17-18lbs which was quite away from your 10-12lbs.

    When I look at it now though there is not as much difference as I thought.
     
    #269 craigandy, Feb 24, 2015
  10. ucantseeme

    ucantseeme Regular Member

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    I finished 2 Adidas P350. One with BG65 blue and one with ZM 62 (2nd gen) yellow yet.
    BG65: Tension: 23x25 PS, 1123 Hz.
    ZM62: Tension: 22x24, 1172 Hz
     
    #270 ucantseeme, Feb 27, 2015
  11. visor

    visor Regular Member

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    Just had strung ZM62 silver 1st generation (=ZM60... even thinner than 2nd gen). At 23x24 lbs, it has stabilized at 1220 Hz after 1 wk.
     
    #271 visor, Feb 27, 2015
  12. ucantseeme

    ucantseeme Regular Member

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    Oliver Fetter Smash with BG80 Power @ 22x22: 1131 Hz
     
    #272 ucantseeme, Mar 1, 2015
  13. ucantseeme

    ucantseeme Regular Member

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    One of my BS10 again. BG80 Power 30x30 lbs: 1315Hz
     
    #273 ucantseeme, Mar 22, 2015
  14. Exert

    Exert Regular Member

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    Strung an ns 8000 with bg 65 black pinging at 1115.72hz? 24 x 26
     
    #274 Exert, Apr 2, 2015
  15. ucantseeme

    ucantseeme Regular Member

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    Right off the machine? Must be a flying clamp and crank job, right?
     
    #275 ucantseeme, Apr 2, 2015
  16. Exert

    Exert Regular Member

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    Yup right off & need to buy new clamps mine are slipping , mbs 6 tooth ones or should I get hiqua 6 tooth. Currently use pros pro ones
     
    #276 Exert, Apr 2, 2015
  17. ucantseeme

    ucantseeme Regular Member

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    Can't help you. I don't have any experieces with the mbs or hiqua ones. I can only recommend the YY's. They can handle 26lbs with ease. For anything above I use my fixed clamps.
     
    #277 ucantseeme, Apr 3, 2015
  18. Exert

    Exert Regular Member

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    Ah it's okay thanks , I just ordered mbs ones should be fine.
     
    #278 Exert, Apr 3, 2015
  19. ucantseeme

    ucantseeme Regular Member

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    This one broke yesterday. Now 30x30 BG Power on the same BS10 again. 1324Hz right off the machine. Should be a constant and reproduceable result.
     
    #279 ucantseeme, Apr 8, 2015
  20. ucantseeme

    ucantseeme Regular Member

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    Finished my MX80OC yet to beat up some juniors tomorrow. BG80 @30/31. Pings with 1329Hz.
     
    #280 ucantseeme, May 7, 2015
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