Just got my 5412L compound miter saw, and was trying to go thru the
adjustment portion of the manual.

I put the combo square up against the blade and the table as per the
manuals instructions. The manual goes on to say "if the square does
not completely contact the blade, and adjustment must be made". My
issue is that the square contacts the blade at the bottom edge of the
blade, and nearest the arbor. In between, I see a little light peaking
thru.

Is this normal? Its a 12" saw, I was sorta thinking it might just be
because the blade is weaker in the middle and slightly bowed. I made a
couple test cuts and they seemed OK, but I dont have a really good
protractor to verify.

Thanks in advance!
-Chris

Check the test cuts with a good square. That's the proof of the
pudding! It seems a little odd that the saw blade is thinner in the
middle. Checking the square across the blade on the outside perimeter/s
of the blade would also work
Bugs

I'm not sure where your'e putting the edge of the square. Is it
possible there's some debris on the flat where the blade washer and nut
are, that might be deforming the blade, or that the blade *might* be
deformed at all? I think I'd take it off and check it on a flat surface
to make sure it's not deformed.

Then I think I'd check the cut by making a test cut on something as
tall as the saw could cut, then flip one side and see if there was any
light showing. On a perfectly straight up-and-down cut, the pieces
should fit together perfectly even when one piece is flipped upside
down.

Im following the Bosch procedure in their manual, and its not very
clear. For instance, they say to lock the sliders in the "back"
position, but the figure they refer to for squaring up to the blade
shows them in the "forward" position.

There is no debris in the middle of the blade, I made sure of that. I
havent tried removing the blade to see if its deformed. I suppose
thats possible, but Id find it odd. Then again, the fact that my
square touches at each end of the square but not in between the ends is
odd as well. I admit I dont have the highest quality square, but it
doesnt seem to be off (if I place it on the table, assuming the table
is flat, I dont see any spots where light gets thru between the table
and square).

Id have to go dig up a large piece of material. 12" saw has a pretty
decent max capacity. I suppose I can try a piece of 4x4 as a decent
test.

-Chris

wrote:
I'm not sure where your'e putting the edge of the square. Is it
possible there's some debris on the flat where the blade washer and nut
are, that might be deforming the blade, or that the blade *might* be
deformed at all? I think I'd take it off and check it on a flat surface
to make sure it's not deformed.

Then I think I'd check the cut by making a test cut on something as
tall as the saw could cut, then flip one side and see if there was any
light showing. On a perfectly straight up-and-down cut, the pieces
should fit together perfectly even when one piece is flipped upside
down.

It's the rare blade that is truly flat. With the pretension that is put on a
blade, it may well not be strait until at operating rpm. The instructions
are written for Joe carpenter, not Joe cabinet maker. Test cuts are the only
way to be sure. It just makes sense to remove all the variables from the
mechanism when setting up. This means rails all the way back and locked.


wrote in message
oups.com...
Im following the Bosch procedure in their manual, and its not very
clear. For instance, they say to lock the sliders in the "back"
position, but the figure they refer to for squaring up to the blade
shows them in the "forward" position.

There is no debris in the middle of the blade, I made sure of that. I
havent tried removing the blade to see if its deformed. I suppose
thats possible, but Id find it odd. Then again, the fact that my
square touches at each end of the square but not in between the ends is
odd as well. I admit I dont have the highest quality square, but it
doesnt seem to be off (if I place it on the table, assuming the table
is flat, I dont see any spots where light gets thru between the table
and square).

Id have to go dig up a large piece of material. 12" saw has a pretty
decent max capacity. I suppose I can try a piece of 4x4 as a decent
test.

-Chris

wrote:
I'm not sure where your'e putting the edge of the square. Is it
possible there's some debris on the flat where the blade washer and nut
are, that might be deforming the blade, or that the blade *might* be
deformed at all? I think I'd take it off and check it on a flat surface
to make sure it's not deformed.

Then I think I'd check the cut by making a test cut on something as
tall as the saw could cut, then flip one side and see if there was any
light showing. On a perfectly straight up-and-down cut, the pieces
should fit together perfectly even when one piece is flipped upside
down.

I agree that the correct thing to do is push the rails back, thats why
the illustration they refer to in the manual makes no sense to me, with
the rails all the way forward.

Ill pick up a better combo square and maybe a good protractor to make
sure the cuts are straight.

-Chris

CW wrote:
It's the rare blade that is truly flat. With the pretension that is put on a
blade, it may well not be strait until at operating rpm. The instructions
are written for Joe carpenter, not Joe cabinet maker. Test cuts are the only
way to be sure. It just makes sense to remove all the variables from the
mechanism when setting up. This means rails all the way back and locked.


wrote in message
oups.com...
Im following the Bosch procedure in their manual, and its not very
clear. For instance, they say to lock the sliders in the "back"
position, but the figure they refer to for squaring up to the blade
shows them in the "forward" position.

There is no debris in the middle of the blade, I made sure of that. I
havent tried removing the blade to see if its deformed. I suppose
thats possible, but Id find it odd. Then again, the fact that my
square touches at each end of the square but not in between the ends is
odd as well. I admit I dont have the highest quality square, but it
doesnt seem to be off (if I place it on the table, assuming the table
is flat, I dont see any spots where light gets thru between the table
and square).

Id have to go dig up a large piece of material. 12" saw has a pretty
decent max capacity. I suppose I can try a piece of 4x4 as a decent
test.

-Chris

wrote:
I'm not sure where your'e putting the edge of the square. Is it
possible there's some debris on the flat where the blade washer and nut
are, that might be deforming the blade, or that the blade *might* be
deformed at all? I think I'd take it off and check it on a flat surface
to make sure it's not deformed.

Then I think I'd check the cut by making a test cut on something as
tall as the saw could cut, then flip one side and see if there was any
light showing. On a perfectly straight up-and-down cut, the pieces
should fit together perfectly even when one piece is flipped upside
down.