Burning angled cuts on table saw?

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Forum topic by ravensrock posted 03-21-2016 03:01 AM 707 views 0 times favorited 13 replies Add to Favorites Watch
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398 posts in 1191 days

03-21-2016 03:01 AM

Topic tags/keywords: question walnut tablesaw

Does anybody have any ideas why I’m getting burning when making 45 degree cuts on my table saw? I have a Sawstop PCS175 with a recently sharpened WW II blade. I’m making a box out of walnut and when cutting the mitered corners I’m getting burning and sometimes a lot of smoke. I doesn’t happen when making 90 degree cuts. Makes me nervous when smoke is coming out of my table saw especially after seeing a recent episode of Highland Woodworker on fire safety in the shop. Any thoughts?

-- Dave, York, PA, WildSide Woodworking

13 replies so far

View Aj2's profile


817 posts in 1346 days

#1 posted 03-21-2016 03:38 AM

Hi,Dave your tablesaws TOP may need to be shimmed in the front or back.Lots of info on web how it’s done for cabinet saws or trunnions.

View chiseler's profile


121 posts in 437 days

#2 posted 03-21-2016 04:18 AM

Are you sure your pieces are perfectly flat,A bowed or twisted piece will push up into the blade and cause it to burn

-- Scott.Triangle,NY Becareful and don't forget...They cut meat too!

View widdle's profile


2060 posts in 2547 days

#3 posted 03-21-2016 04:23 AM

Mabye try, rough it to within a sixteenth and then do your final cut..Although smoking sounds a bit extreme..

View chiseler's profile


121 posts in 437 days

#4 posted 03-21-2016 04:33 AM

Also check that your fence is parallel to your blade(better yet,a 1/64”wider in the back)When it’s tighter in the back it will show up worse when you drop the saw on an angle.

-- Scott.Triangle,NY Becareful and don't forget...They cut meat too!

View jmos's profile


754 posts in 1918 days

#5 posted 03-21-2016 12:32 PM


Have you gone through the procedure in the manual for adjusting the blade when it is tilted. It’s page 67 in the current manual. I just got my 3hp versions so I recently checked the set-up.

Your blade can be good at 90 and still off when tilted, leading to what you are describing.

-- John

View knotscott's profile


7432 posts in 2924 days

#6 posted 03-21-2016 01:28 PM

How thick is the material?

Walnut can burn easily. The WWII 40T can burn with thicker materials…gunk on the blade can exaggerate it. If the material is in the range of 1” to 1-/4”, it’d probably be fine during a 90° rip, but at 45° the material effectively becomes thicker, which can cause burning. As mentioned, the alignment could be off at 45° too. If the boards haven’t been flattened and straightened, the chance of burning increases a lot.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View ravensrock's profile


398 posts in 1191 days

#7 posted 03-21-2016 01:52 PM

Thanks for the replies. The material is 1/2” thick and perfectly flat.

widdle- I tried that on one of the cuts and it worked better. Good suggestion.

jmos- I haven’t gone through that procedure but will look at it. Maybe that’s the issue.

-- Dave, York, PA, WildSide Woodworking

View oldnovice's profile


5867 posts in 2916 days

#8 posted 03-21-2016 05:05 PM

You might also consider the feed rate since letting the blade rotate in one spot too long can have the same effect!

-- "I never met a board I didn't like!"

View firefighterontheside's profile


14305 posts in 1405 days

#9 posted 03-21-2016 05:13 PM

Is your throat plate level with the top?

-- Bill M. "People change, walnut doesn't" by Gene.

View Redoak49's profile


2181 posts in 1537 days

#10 posted 03-21-2016 05:15 PM

Can you post a picture of the piece and how you were cutting it.

View ravensrock's profile


398 posts in 1191 days

#11 posted 03-22-2016 01:39 AM

Yes the throat plate is level with the top. Maybe the blade hits the sides of the throat plate when tilted? Here’s a quick pick of how I had it set up. I noticed there was a little play in the auxiliary miter fence which might have played a role. The miters themselves actually fit pretty tight. I still have to check the alignment when the blade it tilted as jmos suggested.

-- Dave, York, PA, WildSide Woodworking

View bondogaposis's profile


4179 posts in 1899 days

#12 posted 03-22-2016 01:49 AM

Switch slots w/ the miter gauge and you will have better support behind your board. That plywood may be flexing.

-- Bondo Gaposis

View ravensrock's profile


398 posts in 1191 days

#13 posted 03-22-2016 01:51 AM

Good idea Bondo. I used a longer piece of plywood to support the full length of the board before I started cutting and I was getting some flexing.

-- Dave, York, PA, WildSide Woodworking

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