I have owned one of these for two years and as a hobbyist, have put about one hour on it. I am a tool addict. Anyway...
When I run this machine, it sounds like there is a bearing rolling around in the area of the lower Wheel shaft/bearing assembly. Sounds like I am running the clothes dryer with a golf ball inside. The rapping sound is random but constant - reagardless of wether or not I am running wood thru. It has been used for 1" X material so far.
Anyone have any experience with this? I would be thankful for any feedback.