I've had the HF dust collector for about 7 months now with no issues. Went out to the shop yesterday to work and fired it up and it started making a vibration/resonant sound. It didn't sound like the impeller was hitting anything or scraping but there's a vibration coming from the motor. I've tightened down every bolt I see, but can't quite figure it out. I've recorded it here:
https://clyp.it/xgu4bvyu
Has anyone experienced this before? Trying to see if there's an easy solution before I have to figure out who to go through for the warranty.