Length of string does not change the tension on the string. It (longer string) will change (Make DT lower) the dynamic tension but not tension. Tension in the string is equal to the force applied to the ends. If you pull 2 string you will have half the Wise tension applied to each string.
Not really. In this case you pull the racket with 100 lb against the 12 o'clock fix point on the machine. If you're pulling normally only 55 lbs.
I'm still not sure, as when you pull the second main at 50lb there's already 50lb on the first main = 100lb at 12 o'clock?
I will do some tests with my load cells!
Probably. But I can't tell anything from the vid. It just looks like double pulling to me. wise pulls on a metal thing that has 2 strings attached. How is that different than putting the strings directly to the wise?
He has a linear gripper connected to a U bolt. The two strings from the racket (1 in your case) go into The linear gripper. Then there’s a loop OG string anchored to the from of the wise (it looks like,) loops around the U bolt, and into the wise. Tension on racket side of linear is almost doubled with the pulley leverage. A pulley in place of the U bolt would have been more efficient.
sorry I dont see it. The description doesn't follow either. What is "loop OG string anchored to the from the wise" mean?
Freeze the frame at 15sec in the second film.
Just look at picture of video in post 21. There is a bar from LO tension arm Where a loop “of” string is connected (not OG.) that string goes through the U bolt and to the wise gripper. Once the string is taught every 2 cm of Wise gripper pull pull the U bolt 1 cm closer giving you a 2x advantage (minus friction.) Assuming you put a string string in the gripper with the U bolt and set tension to 60 your reference tension is doubled to 120. There is 60 lbs on pull on the vertical bar and 60 lbs on the wise minus the friction of the string going around the U bolt.
How could everyone use it? Don't you need a bunch of things that most people wont have?
I concur.
There are already methods that can accomplish that (even if you don't have, or choose not to use, a starting clamp).
I’m sure it could be made simpler. But the real question is will the machine, racket, string, clamps, and bases handle the extra tension you will be able to pull? I’m sure you have more drawback, wear, and tear on your clamps and bases at 86# than normal. What going to happen if you bump the tension up 50%?
Unless I’m mistaken there are 2 linear grippers in this setup. There is a linear gripper on the Wise and another linear gripper the U bolt is connected that pull the string from the racket. The Wise gripper has normal tension which is 50% less with the diablo and the other that pulls the strings from the racket has 100 more tension than what is set on the Wise. So the second linear gripper has 4x the pressure of the wise which could easily damage the string.
Complete surface area does not count only the portion that contacts the string.
6 times more length? How do you get that? The string from the racket does not go around the diablo which drops the tension between the diablo and gripper by 50%. Your still doubling the pressure on the 2 string you’re pulling.
I suspect there are other factors at play here.
I can’t remember ever having a string break at a point where I used a starting clamp. I have damaged string with a bad clamp but I replaced the string before I finished the racket. If a starting clamp is damaging a string you either have a poor quality clamp or you’re using it wrong.
