Hi,
When I run stock through my jointer, it vibrates almost very violently. It's not enough to throw the piece out of my hands but enough to make controlling the piece difficult if I were to face-joint it.
When your leg is asleep and you're trying to move it, your leg feels very tingly and limp. That's the kind of sensation I feel through my hands as I brace the stock while it initially enters the cutterhead.
I suspected the belt and took a video of the jointer running without the guard, fence, and fence assembly (link to the video below) so that it was visible.
It looks like it's loose. There's also some shallow tearing of the fabric that covers the belt but I'm not sure if this warrants a replacement.
I went into woodcraft to try face jointing on their Powermatic 6" jointer and the vibration through the feed was 3x more manageable. The powermatic jointer did use a helical cutterhead so it's not a direct comparison
but the cut quality was great and the vibration was minimal.
Best,
MT
https://www.youtube.com/watch?v=V1tvJgSLwp8