Greetings, I'm new here and glad to be part of the community.

I have a 10" Craftsman table saw (120V single phase direct drive), it's been working fine for about 3 years but lately it's developed a problem. It has a lot of vibration and noise when starting up. I mean enough vibration that the blade height adjustment shifts, and a pencil or small object left on the table gets jolted off. The vibration lasts about one second, once the blade is up to speed it works normally and cuts fine.

Removing and replacing the blade didn't help. The blade looks fine, no defects, and the motor shaft turns smoothly. I tried some compressed air on and around the motor to blow out any sawdust, it helped a little but after a few miter cuts the vibration was back.

Any ideas on what's happening? Thanks very much,

-Andy