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Thread: which one is more accurate
06-20-2012, 11:12 PM #18
Yes,You messure your machine, you said it is same as pilot, a table crank machine. But your machine is only a dropweight with fly clamp.
What is the different between the table crank machine and yours? you don't know. You are not good in phy/math. So you don't know the difference. Only said "they are same, they are same",hehe
06-20-2012, 11:19 PM #19
I know kwun is Administrator, if you ban me for these posts, it's ok. Then I know what the badmintoncentral is. I just know Gary Locke help someone to express himself opinion. I'm glad to talk about phy/math with know phy/math. Thanks for kwun's caculate about the error of the angle, it remind me the string length is different between dropweight and crank.
06-20-2012, 11:30 PM #20
I said they look similiar since I do not own a Pro's pro machine. Here's the originlal post,
"I saw it. I am saying my machine's base is similar to your pilot one, but my machine before the modification was a drop weight, clear?"
Yeah, you asked me the difference between the BASES of a Pro's pro crank and a Pro's pro drop machine, not the tensioning mechanism. That was very fair of you
Sorry guys, I felt I was feeding a troll...
06-20-2012, 11:33 PM #21
06-20-2012, 11:36 PM #22
06-20-2012, 11:49 PM #23
06-21-2012, 12:05 AM #24
Some one dispute me about my pic about the dropweight, said it is not mine, and it is stoled from pro's pro. And tell me that I was illegal according to the Clauses 217 in Criminal Law of the China .
Then I show him this pic that AEF's website stole the pic from pro's pro manual. Ask him to help me to prosecute them. Then my id is banned. I think everyone will understand what that mean whether he is a real foreigner or not.
can you help me to translate this matter into more exact english word? And let all the world to know what happend?
06-21-2012, 12:40 PM #25
Here many people using pro's pro machines, but at badmintoncn.com AEF's stuffs said what bad machine it is , and theirs are what good machine for higher price, is it? zombie0517, haha, it's funny.
06-21-2012, 01:45 PM #26
If string with Pre-stretch and tension adjustment for head/bottom/center/left-right, crank is better choice. Easy to operation.
If only string with one or two tension adjustment and have many experience about dropweight machine, dropweight is better choice with lower price.
Look at this video, he always adjust the tension head angle at least twice, and when he operate the rackets side, the arm is lower than H persition. That mean it need more experience for a dropweight machine.
And another thing you should notice is the chanllenger I has a ratchet tension system , challengerII has no that such as the alpha in this video. From this video if the machine has no that ratchet tension system, the arm position maybe not stable.
Also wrong concept "constant pull with dropweight" at the reply. Almost it is only a concept, no one can wait until the string be elongated. Almost all "DP is accurate than crank" supporter talk about this wrong concept, but most popular accurate stringing method is Pre-stretch and tension adjustment. The DP user didn't use this two methods?
06-25-2012, 12:58 PM #27
Assuming static analysis, we have equation as:
assuming 10 degrees of error margin (alpha and beta) cos(10) = 0.98481
f*r = M*g*R
Say, 26Lbs norminal tension would result 0.395 Lb difference, however, if we always set
level upward (using alpha), then the gradual string elongation will correct tension to approach
the set norminal tension, once the level reaches Horizontal, any string elongation will results
in tension loss, but maximum loss or gain is limited to 0.395LB.
I would say drop weight is damn good in accuracy. The way we are string the racket actually have more roles to play, such as avoid sharp angle pull. Case closed
06-25-2012, 06:05 PM #28
06-25-2012, 10:06 PM #29
I'm not a stringer. But this thread is amusing. There is one thing that I can conclude. Due to the drop weight being not horizontal at different part of the racket (different string length resulting in different stretched length causing different angle of the dropweight), this will result in uneven tension across the racket (it is very slight). This will even out after usage. Basically just string a bit tighter than you like. If the string loses it's tension over time, how much tighter than ideal tension to user depends on string.
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