Dewalt DWS779 out of alignment

[bdbull]

I can't seem to get my Dewalt DWS779 properly aligned. I've gone through the adjustment procedures and everything measures out to be square, but I'm still having issues. I can cut a 0 degree miter on a piece of 4.25 baseboard standing up and it comes out perfectly. However, when I swing the miter to 45 degrees either way, it doesn't come out square. I can't seem to figure out how to fix it since everything measures perfectly square with my carpenter's square at 0 degrees. I'm very near to taking it back for a replacement.

Any help?

 

[ADSR]

How far is it off? I'm guessing the notch is off on the degree marker.

 

[bdbull]

Just realized I wasn't quite clear. When I swing it to 45 degrees either way, the bevel of the cut is no longer square. The finished cut looks as if the blade went down through the wood at a slight angle. I'd say it's off about 1/16" by the time the blade reaches the bottom of the 4.25" cut down through the baseboard.

 

[ADSR]

That's a tough one to get perfect. If you do take it back, you might get one that's even worse. How's the square and 45's on the flat? Cut a 0 on the flat, turn it over against the blade and see if there is a bevel to the cut.

 

[The Cobbler]

are you sure about your being off? a pc of baseboard might be deceiving. try doing the same cut with a pc of 1x pine or something to see.
if it is off, check the back fence to see if it's 90 to the table. that's all I can think of that must be off.

 

[bdbull]

are you sure about your being off? a pc of baseboard might be deceiving. try doing the same cut with a pc of 1x pine or something to see.
if it is off, check the back fence to see if it's 90 to the table. that's all I can think of that must be off.

Yeah I'm pretty sure. I'm trying to cope the ends by starting it with the miter saw. I make the first inside corner cut to expose the profile. Then I swing the saw the other way to cut out the back down to the curve. It's when I do this that I see the angle as I hit it right on the edge at the top and it's off by 1/16 by the time the cut gets to the curve.

 

[KnurledNut]

Its the removable fence wing. I had one with the same problem.
It was most noticable doing the pre-cope cut you are doing.
I could find no permanent adjustment.
A couple runs of painters tape across the fence will build it out enough to compensate.
I used the same tape to mark for crown, as i didnt have crown tabs.

 

[Wolfman6]

I have to agree that your fence is not 90* to the table or the relief cut on the back of your molding is making it lay back at an angle. Make sure the the fence wings are locked in place before your cut. If they are not tightened, they will not be at 90*.

 

[bdbull]

OK, I think I understand what you guys are talking about. I've been holding the baseboard pretty tight against the fence when making the cuts. If that's the cause, is it adjustable? I'm at work right now, but will check it out when I get home.

 

[The Cobbler]

the only way it would be adjustablele is to shim it I suspect . you want it 90degrees to the base of the saw . if it is out, I would warranty it tho .

 

[Itsjustdirt]

RETURN IT. No reason not to. Don't rig a brand new, quality tool.

 

[bdbull]

The camera on my phone is terrible, but you can see the tiniest gap in there.