On the contrary Master Tan, there is enough room between the strings, just enough...I measured the cross string and moved the adjacents strings away accordingly. Panda smaaaart!
Which cross string or strings did you move and which cross string did you measure? Did you use a clamp to hold on to the moved strings?
I measured the few strings right in the center of the racket. There's no need to clamp the moved strings, they do not touch.
I thought it was all in my mind when I told people Ashaway MP played a LOT thinner than 0.70. Good to know it's not, but it makes me wonder just how thin it is when I pull it to 31... I might expand on this my testing some otherwise useless scraps of fresh string at various tensions - if I can borrow my father's friend's vernier again, that is...
I got this from Steve Crandall from Ashaway after I forwarded Dink's post: Hi, We use a hand held Micrometer.It's tough to get an accurate reading on a multifilament string.By nature they are not round.A caliper is very accurate but too time consuming for the manufacturing process. MicroPower Ti (white) is very thin.That may be what they measured. Best Regards, Steve
I just measured MP White at 30lbs. on my 2U Ti10 and the thickness averaged out to be 0.65-.66mm. I suspected this because when tensioned, both MP White and BG66 looked and felt very close in diameter. This is why I did this test in the first place.
Now some people say a micrometer is more reliable, because of the slip-clutch you can compress the string... And compression would, understandably, mess up all readings... but then, all ratings wouldnt be consistent to the 0.01 degree (he's never off more than +-0.01mm) the same goes for the fact you could hold the micrometer at a cut angle, and measure it different.. yet again, dinky is way to consistent, (and because the strings bend a little, this problem neglects itself..) Thirdly, some say you should calibrate it... but then, Dinky's ratings pretty much confirm all rumors.. and, even if it isn't calibrated, the difference between the 0.71 and 0.72 would be the same, even if the actual ratings are 0.69 and 0.70... Basically, This is is sound testing, if you ask me... Dinkalot the science panda Now, what I'd be curious about, if you tension a string (just tie it off at a support, no need for a racket) and tension it 23, 25, 27, 29, 30 lbs etc. how the thickness will vary... will only take a minute of 5... But I don't have such a nice tool.. I'd have to steel one from the university I'd hate to explain to everybody why I got expelled
You can get the better grade Mitutoyo calipers and handheld outside micrometers for less than US$100 each. Go for the vernier type as they have better resolution. They are very useful tools which can come in handy for a variety of uses. A micometer is safer and more accurate to measure badminton strings and frame/shaft because it won'tl knick/bruise paint and strings and coatings that calipers tend to do. A caliper also measures internal diameter and internal length. These two tools are very useful for racquet manufacturers, machine shops, and the home handyman.
Yeah, I can take the string into a univ physic lab and ask for the laser caliper. I can tell you that Dinker's (not the winker) measurement is pretty close to what we have found on BG65 under 0 tension. As I said before that Yonex string QC is done during the production process and the string is under some tension and that is where the measurement was done.
now, how about tolerances? Dink has the effort to produce some reference for us to view. plus minus couple of 0.05mm, shall be fine. can i sue manufacturer if their specification is out from printed-label??
Yonex under tension I just have just strung my W7 with BG-80 at 26/29 (crank) and taken some readings: mains are 0.69 at the centre, graduating to 0.72 at the sides, while crosses are between 0.67 and 0.68. Since it is ostensibly 0.68mm, it would seem that BG-80, at least, assumes a crank tension in the high twenties (or an electronic in the mid twenties). Makes sense, as their rackets are warrantied up to somewhere in this band.
Ashaway UK picked up on this thread (way back when) http://ashawayuk.blogspot.com/2008/04/independant-badminton-string-comparison.html P.S. Hi again everybody
WB neil. I personally don't follow or believed the stated diameter of any brands of string. I just know what strings do what and nots, and how they're compared wtih each others. However, yonex should be embarassed to have such huge deviation of diameter from the specs stated on package. Japan products are often revelled for their high quality and tight tolerance to specification. If they can make their racket color pattern so detailed to thwart counterfeiting, surely they can make string diameter more closer to specified dia. If yonex had just stated their string specs in AWG (20,21,22), that is fine but stating actual diameter and can't meet them? --> evil.
just a quick note I dug out an old imperial micrometer and tested some BG65 I was stringing (calibration: zero looked dead on) untensioned BG65 (black) at various places 28.7, 29.3, 29.2 thousandths of an inch ~ 0.729, 0.744, 0.742 mm BG65 (black) @ 16lb 27.5, 28 thousandths of an inch ~ 0.699, 0.711 mm not a particularly thorough test, but some backup for the claim that Yonex's thicknesses are measured under tension
by your account, shouldn't racket manufacturers categorize their racket weight and balance OF A STRUNG RACKET
the best policy is the declare specifications 'as is condition' of a sale product. karakal could say 70 gram too if grip and paints were removed, maybe sub 70 gram too if grommets are excluded as well.
yes u can sue if u can show the court the wrong diameter caused u mental anguish that led to personal financial failure.
Well, Does it matter? as long as it's consistent it's fine. Best would be if all brands were on the same page, but you can't have it all Give a man 2 rackets, one says frameweight 70, other frameweight 75. Give the same man, the same two rackets, but now call them 80 grams and 85 grams (respectively) 'unstrung weight'. ...Does it matter? Now, the confusion comes when the man gets a 70 Frameweight and a 90grams unstrung weight, or something like that.
