I've just put my used Powermatic 64 Artisan's Saw together. When the belt is attached to the motor, it makes a sound that seems like something is unbalanced. When the motor spins freely without the belt attached, the sound goes away.
I have uploaded a video to youtube demonstrating both of these sounds: https://youtu.be/55UqASDmyec
Is the sound that the saw makes under load of the belt (note: there is no blade in the saw yet) normal, or is there something I need to look into? If so, what?