How much time does it spin?
Many of the early Sword Launchers that came with Xeno Xcalibur were defective. There are was a revision made to fix the issue.
You may have the older dud launcher.
Apparently there are two of this thread. So I am quoting my answer onto the more popular thread.
(Dec. 19, 2017 12:02 AM)Flame-Byxis Wrote: [ -> ]Xeno Xcalibur has low stamina that is likely your problem. Does this occur with a Stamina Beyblade?
Adding onto that does this problem occur with a different launcher?