when i play with my racquet, the main string move a lots, someone know why, my tought is that the cross strings are too loose but is there something with the grommet, mine are very old ?
It could be the tension is too low, however, no matter how high the tension is, the string could still move if the string is still new. There is no "cutting-in" to set the strings in when the strings are still new.
I highly doubt that it has anything to do with the grommets. I think you should provide a little more detail: string new or old ? tight or loose ? I personally think its the way you are hitting the bird. I find that players who do not hit the bird flat and instead slice it on angle results in main strings moving quite a bit.
