This first link explains the dangers of not having your blade parallel or slightly skewed away from the fence.
http://www.raygirling.com/kickback.htm
This link provides information on how you go about adjusting and fine tuning your table saw.
http://www.woodmagazine.com/wood/pdf...ds-038free.pdf
Quote:
Originally Posted by johnny means
Does this happen regardless of the width of the piece being cut? It is possible that your fence rail(s) may be tweaked. If so, you can get a "good" parallel reading on the fence near the blade, then the fence can skew a smidge once you've moved it out past the tweak point. The way to check this would be to make multiple cuts at different widths.
I'm aware of the notion that the fence should skew away from the blade, though I don't buy into that notion. But, even if you do, your material would still ride against the fence the entire length of the fence.Quote:
Originally Posted by Adam Wilson
If the both the blade and fence are parallel to the miter slots, shouldn't they be parallel to eachother? Both my blade and fence are within .005 to the miter slots.Quote:
Originally Posted by Myk Rian
This is a good possibility, I'm going to check this for straightness and see what I find.Quote:
Originally Posted by John Sanford
I feel more comfortable with a very subtle skew away from the blade but it is very small. Maybe 1/32 over the 10 blade dimension. More than anything this is to ensure it is not binding in any wayQuote:
Originally Posted by johnny means
You can't move the miter slots, so you have to make the blade and the fence parallel to the miter slots. I use a dial indicator and get exceptionally close alignments. I also check them periodically to insure that nothing has changed. Material pulling away from the fence usually indicates that the blade is angled away from the fence at the back ans is pulling the material away from the fence as the cut is made. If there is a splitter, it needs to be checked to insure it is aligned with the blade. The splitter can be pulling the material away from the fence as well. CHeck the splitter width relative to the blade. It should be just slightly thinner than the blade.Quote:
Originally Posted by Myk Rian
Actually in a cabinet saw it is the miter slots (i.e. the top) that you move to make parallel to the blade...Quote:
Originally Posted by Lee Schierer
My splitter is removed right now and my blade is within .005 to the miter slot. After cutting multiple strips of MDF last night I noticed little to no gap when using my featherboard and ensuring I feed the board in flat to the entire length of the fence before it reaches the blade.
I think the problem I have is due to some of my stock not being straight, and the way I feed the boards. If the stock isn't fully against the fence at the blade and at the very front, I will run into this problem.
is your blade sharp? A dull blade can pull on your stock, especially if one side of the blade has more build-up of resin/pich/whatever...
After reading this thread and just disregarding it, I did some TS work today. I never look at the end of my fence during a cut. My concentration is on the fence, prior to the blade, and the blade itself. Well, today, I looked at the far end of the fence. Guess what? My wood was not against the edge of the fence at the end of the fence. The fence was extending away from the cut. Problem? NO. Everything was cut square and parallel. So. I'm not too concerned what happens at the far end of the fence past the cut. I could be wrong though.
Just what happened to me.
Mark, if your fence is straight and your board's edge is straight, it would be impossible for the two to be in contact over any length without being in contact over the entire length. Basic geometry dictates that something is not straight. The question is when will it matter and will you know where and how to compensate. I once had to work with a jointer that sagged at the ends. Both tables were adjusted to the cutter, but not parallel to each other. Knowing what was wrong, I was easily able to adjust my technique to get to get flat boards.Quote:
Originally Posted by Mark W Pugh
Try a different blade, a new or recently sharpened blade?
Once the wood being cut is full engaged with the blade from front to back the wood will follow the blade not the fence, it can't do anything else. If the fence slants away from the blade on the out feed end then there will be a gap, it can't be any other way.
I don't think we are accurately measuring here? I would guess that the measurement reported is between the front and the back of the blade in reference to the table slots. It is nowhere even close to an accurate method. The best way, is to raise the blade high, then nest a precision steel straightedge against the teeth at the front and rear of the blade, then measure at the front and rear table edges to the miter slots AND the fence when locked. You are going to be plenty surprised I think. IF you decide to have the fence can't away from the blade, it should only be .005 over the whole distance front to rear of table!
In the absence of a good steel straightedge, you could use a good quality extruded aluminum level which is accurate enough for this task.
Operator error can be a factor.
You might try one of those accessories that clamps to the fence and pulls the stock in tight with canted wheels. Pushing wood in consistently against a rip fence is trickier than we may want to admit... minor errors don't interfere with many types of work, but I advise to be wary of blaming the tool anyway, assuming it's set up right enough. Tracking down tiny errors in machine alignment can be interesting but won't give "perfect" results without the most discerning user behavior.