Replies

1. 
   boilerbay | Sep 10, 2009 10:36pm | #1

   Did you move the saw recently - especially by holding the table top for leverage? Maybe after a cold night. The top may have shifted. Common occurrence. If so, you may have to loosen the table top bolts -- usually 3, and realign / tighten.
   Don't over tighten -- cast iron breaks.

   Boiler

2. 
   SteveSchoene | Sep 10, 2009 10:44pm | #2

   If you have a cabinet saw, the top has shifted and you will have to realign it. It's pretty easy--there are 4 bolts that connect it to the cabinet and they get loosed and retightened.  It takes a bit of "futzing" just because the top can shift a bit as the screw tightens.  Make sure of the parallelism of blade to miter slots. 

   But, with a contractor type saw, the trunnions are connected to the table and have shifted and you have to realign in a more complicated process adjusting the trunnions relative to the table.  I haven't aligned a contractor's saw in a month of Sundays so I'll leave it to others to help with the fine points. 

3. 
   trialnut | Sep 11, 2009 04:38am | #3

   If there are loose washers that go on each side of the blade you may have swapped them. There would only need to be .008" difference in their thickness to move the blade over 1/64"

   Rich

   The Professional Termite

4. 
   KeithNewton | Sep 11, 2009 06:01am | #4

   Are you sure what you stated is true, or did you just notice that your regular blade is away from the kerf? The dado blade may have more set than the others.

   On my old sleds, I usually have a sacrificial piece of 1/4" mdf between the sled and parts to keep down the chip-out, and improve accuracy. If you have not moved the saw, or run your car into it, I wouldn't think you should be worrying about change. But maybe you should talk to your wife and or kids about parking near your saw. %]

   
   

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   Edited 9/10/2009 11:09 pm by KeithNewton

5. 
   JerryPacMan | Sep 11, 2009 03:05pm | #5

   Your arbor could have moved for various reasons.

    

   Life is what happens to you when you're making other plans.

   When your ship comes in... make sure you are not at the airport.

6. 
   9619 | Sep 11, 2009 09:27pm | #6

   Sean,
   as I read this thread, I was watching a rerun on TV of an episode of The Twilight Zone. There are many possible explanations of the phenomanon you referred to. :-)
   Mel

   Measure your output in smiles per board foot. 

7. 
   SteveSchoene | Sep 11, 2009 10:09pm | #7

   As you see the variety of possibilities, it would help us help you if you could provide some more info about your saw--make and model for example, how long you have had it, and when did you first notice the problem. 

1. 
   tdlugosh | Sep 11, 2009 10:34pm | #8

   Longshot, could you inadvertantly left a shim from your dado set on the arbor before instally the blade?