Bruce Horn

Thanks again all for your input. It turns out to be the connecting rod holes being out-of-round. I couldn't find a replacement so I made a new one. It weems to be working well now.

Thanks all for responding. I have a bit of experience. The blade "pings" like a guitar string. I have cut the same wood on my 16" Delta and have had no issue. The drift is extreme, as in I turn the wood but the blade still goes straight. It is a pinned blade, so it may not be tight in their seats. I did discover tonight that the bar connecting the upper and lower arms has a hole slightly out of round, introducing slight slop in the vertical motion, so maybe intermittent loss of tension?

I have a Craftsman 20" Professional, garage sale find, that doesn't track properly. When I try to cut a curve it wants to stay straight. The tension is tight and the blade is thin, 12tpi. The material is 3/4" pine. Any thoughts?