So my 8 year old powermatic 66 starting acting a little funny last month. A blade that used to make a mirror finish (absolutely zero blade marks) started leaving blade marks so I started with the obvious and got the blade sharpened. Got it back and it did the same thing, so I sent it to a better sharpening place with CNC machines and computer balancers and it still did the same thing when I got it back. That I went full blow crazy and basically overhauled the saw. I took it completely apart, replaced the arbor bearings, cleaned everything spotless, and put link belts on it.... still does the same thing.
I do notice a harmonic vibration with the saw running and I'm almost positive that is what is causing the blade to shake just a tiny bit. All of my blades do it so I know the blade isn't the problem. I have also noticed that the belt closest to the arbor visibly vibrates while the saw is running and the outter one is rock solid. I'm almost positive the pullys are lines up properly so this makes no sense to me.
I'm open to any suggestions. The saw used to cut flawlessly so this is really frustrating me. Now I just can't let it go. I'm really suprised the v-belts (power twist by fenner drives) are acting like they are.
PS... i'm new to sawmill creek and I love it. What a great community of people.