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Need Help with Table Saw Cut Issues

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Forum topic by FourBWoodworks posted 02-12-2018 02:39 PM 428 views 0 times favorited 3 replies Add to Favorites Watch
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FourBWoodworks

1 post in 388 days


02-12-2018 02:39 PM

Topic tags/keywords: table saw saw arbor blade crosscut runout

I have a strange issue with the cuts on my table saw. I have an older 3 hp Delta Unisaw. The beginning of any cut has a slight bevel leaning to the right and the back of the cut piece has a slight bevel angle to the left. It’s like there is a twist in the end of a crosscut. This happens with ripping too. I have tested multiple Freud blades and get the same result with each one. I have tried full kerf and thin kerf blades and have tried multiple types of wood. I can’t figure out the problem. I have the blade set at 90 degrees and am sure it is set correctly. I use machinist squares and I have a Wixey digital angle finder to set it. My saw blade is parallel to the miter track within .0005” and has been rechecked many times with my dial indicator. The blade at 45 degrees is parallel to the miter track within the same tolerance. It was slightly off but I shimmed the front of my table and got it parallel. Runout on the arbor is .003” and around .008” at the end of the blade. There is no play at all in my arbor when I try to move it. I can’t figure this out. The angle is not very severe but it is very easy to see when making shoulder cuts on tenons as this causes there to be gaps. Any help would be appreciated.

http://i36.photobucket.com/albums/e44/Bradross20/A830F800-2B25-4D08-A388-4D4058667CD8_zpsm0ebv2b7.jpeg

http://i36.photobucket.com/albums/e44/Bradross20/C304E7F1-327C-45F2-B015-0C871373FBA8_zpsqpcv6ias.jpeg

http://i36.photobucket.com/albums/e44/Bradross20/B1CDAB62-DE3A-4239-B440-F4D381223FAD_zpsc0xljd2x.jpeg

http://i36.photobucket.com/albums/e44/Bradross20/A830F800-2B25-4D08-A388-4D4058667CD8_zpsm0ebv2b7.jpeg

-- Brad Ross, Four B Woodworks


3 replies so far

View Aj2's profile

Aj2

1885 posts in 2002 days


#1 posted 02-12-2018 02:58 PM

If it shows up during a cross cut I would look for a high spot around or on your throat plate.
If it’s showing up on rips same high spot + twist in wood or wonky fence.
I could not see any photos on the bucket.

-- Aj

View WhyMe's profile

WhyMe

1074 posts in 1765 days


#2 posted 02-12-2018 03:38 PM

Photos don’t work. Agree with above.

Edit: Got photos to show, took awhile to load.

Is there any play in the miter gauge in the table slot? May be it moves a little in the slot as you are pushing it through.

View Loren's profile

Loren

10477 posts in 3852 days


#3 posted 02-12-2018 04:07 PM

https://woodgears.ca/saw_arbor/index.html

If going to extreme measures to tune the saw
isn’t something you want to do you might
consider acquiring another saw. I have a
printer’s linotype saw that is crazy accurate
for crosscuts. They can be got cheaply, though
it can take awhile to find one. Because the
arbors don’t tilt there’s less to go wonky.

Saws by makers Inca and Ulmia are reknowned
for their accuracy in precision cuts. I’ve had
some Incas. The old Delta tilt top saws are said
to be good for joinery as well. Old variety saws
can be found for not too much money, though
some makes and models are sought after and
collectible. One drawback is they are very, very
heavy.

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