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Table saw wont cut a "perfect" square?

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Forum topic by jonnybrophy posted 06-16-2017 04:26 PM 1262 views 0 times favorited 18 replies Add to Favorites Watch
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jonnybrophy

160 posts in 449 days


06-16-2017 04:26 PM

Topic tags/keywords: question tablesaw miter saw

Hey guys, following the purchase of my current contractors saw, ive been trying to tune it up to the best of my abilities.
Fence and blade are parallel to the miter slots, and everything seems good, however,
no matter what i do, I cant seem to cut a square piece of wood.

This happened with my old table saw too, what am i doing wrong? I cut one side, rotate, cut , rotate, cut etc
but it never turns out square( 4 90 degree angles)

P.S. I am using the delta sliding table attachment, and ive been trying to tune that as well. I used an anle finder between he front of the blade and the sliding table, and also the back of the blade and the sliding table. Both check out at 90 degrees.

Please help, thank you in advance

-- "If she dont find ya handsome, she better find ya handy"


18 replies so far

View jmartel's profile

jmartel

7530 posts in 1988 days


#1 posted 06-16-2017 04:29 PM

Small errors add up. Remember that you have 4x the error the way you are cutting.

-- The quality of one's woodworking is directly related to the amount of flannel worn.

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firefighterontheside

16943 posts in 1695 days


#2 posted 06-16-2017 04:32 PM

What he said. Try cutting a piece that is the width you want with the table saw fence. Then cut it to length(same as the width)

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

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jonnybrophy

160 posts in 449 days


#3 posted 06-16-2017 04:55 PM

Update:
Upon further inspection
three of the four corners are “90” degrees but one is at 92 degrees. I think i might be off by .25 of a degree. ( if my math is alright)

Is there anyway to reliably get 90 degrees dead on with my sliding saw (Delta 34-555)?
Thank you for the previous responses

-- "If she dont find ya handsome, she better find ya handy"

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firefighterontheside

16943 posts in 1695 days


#4 posted 06-16-2017 05:19 PM

If that sliding table has calibration adjustments, look up the 5 cut method for squaring a crosscut sled and adapt it for your purpose.

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

View Ruewood's profile

Ruewood

6 posts in 183 days


#5 posted 06-16-2017 06:34 PM

Well, unfortunately the smaller contractors table saws are not as precise as a larger cabinet saw, not discounting a contractor saw here. I would make sure your measuring devices (squares, dial indicators, etc) are accurate, when measuring off of the blade make sure youre not measuring off of the teeth but the face of the blade. Hope of some help

View Loren's profile

Loren

9631 posts in 3486 days


#6 posted 06-16-2017 06:39 PM

The 5-cut method will give you a waste
strip that tells you exactly how far off
you are. I haven’t done it in awhile so
I don’t remember for sure but I think if
the waste strip from the 5th cut comes
out with a 1/16” taper that means your
sliding table is off by 1/64”.

View TheFridge's profile

TheFridge

8323 posts in 1324 days


#7 posted 06-16-2017 07:19 PM

Look up William Ngs crosscut sled build video. He explains everything and how to do it precisely.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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jonnybrophy

160 posts in 449 days


#8 posted 06-16-2017 07:23 PM

Hello everyone, I am very sorry and now i feel like a dork, but….

Earlier this morning when i trying to adjust my sliding attachment to the right height, i accidentally knocked into the motor which must’ve upset the trunnions and moved the blade out of square.
I just found this out, and put it back in place.

Now i am much closer to a perfect square, however i am still off by a noticeable amount. I tried adjusting the sliding table adjustments but its still off and i backed off the positive stop for 90 degrees all the way back. I am thinking im going to have to mess with how it is attached to the saw.

Thank you everyone for your comments

-- "If she dont find ya handsome, she better find ya handy"

View avsmusic1's profile

avsmusic1

175 posts in 523 days


#9 posted 06-16-2017 07:44 PM

+1


Look up William Ngs crosscut sled build video. He explains everything and how to do it precisely.

- TheFridge


View BlasterStumps's profile

BlasterStumps

400 posts in 277 days


#10 posted 06-16-2017 10:40 PM

Thanks for posting this info. I plan to watch it a couple times at least. Very good.
Mike


Look up William Ngs crosscut sled build video. He explains everything and how to do it precisely.

- TheFridge


View Holbs's profile

Holbs

1723 posts in 1867 days


#11 posted 06-17-2017 12:10 AM

I will be doing the 5 cut method shortly myself. In the mean time… how are you measuring your parallel’ism from miter slots to blade, from miter slots to fence? Dial calipers to give that ultra fine measurements in the thousandth? If everything is aligned to 0.000-0.001, I dont see how you could be off 92 degrees on your 4th cut.

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter

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jonnybrophy

160 posts in 449 days


#12 posted 06-17-2017 12:17 AM

Im using a combination square -_-

I wish i had a dial indicator, but no money atm…

-- "If she dont find ya handsome, she better find ya handy"

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Holbs

1723 posts in 1867 days


#13 posted 06-17-2017 12:18 AM

local auctions. I have…6 dial indicators for $5 from a single lot. And I think Harbor Freight has the magnetic base ones for $20

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter

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Holbs

1723 posts in 1867 days


#14 posted 06-17-2017 12:21 AM

a word of note: if you have other machines as well as your table saw that need aligned, dial calipers are the true way to go. invest in 1 even if china one to hold you over.

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter

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jonnybrophy

160 posts in 449 days


#15 posted 06-17-2017 12:23 AM

Thanks Holbs,
One day I will own one of those mitutoyo calipers, one day…..

-- "If she dont find ya handsome, she better find ya handy"

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