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Why cant i cut 45 degree cuts for a box?

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Forum topic by Cole Tallerman posted 653 days ago 3360 views 0 times favorited 51 replies Add to Favorites Watch
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Cole Tallerman

389 posts in 783 days


653 days ago

So I just got a new sawstop contractor saw, and i cant seem to get perfect 45 degree cuts. I made a jig for picture frames that cuts at perfect 45 degree cuts but when i tilt the blade as if to cut the angles for a box, the joints don’t line up. I made a cross cut sled just for this but the blade angle needs to be at 45. All i do is i turn the hand-wheel untill it stops turning because sawstop claims that everything is aligned and so far, everything is. Do I need one of those digital blade angle readers? Also, when i feel like ive hit the 45 degree stop, With a little more effort the hand wheel will turn another half turn. Is there something wrong with the angle stop?

Thanks in advance!


51 replies so far

View DS's profile

DS

2131 posts in 1018 days


#1 posted 653 days ago

Um yah, you’ll probably want to check all your new saw’s setup, especially the 45 degree hardstop adjustment.

It will be worth it, regardless of the company statements.

FWIW, my new saw took almost a week to settle into the new environs, so I repeated the initial setup at that point too.

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

View paratrooper34's profile

paratrooper34

760 posts in 1549 days


#2 posted 653 days ago

My experience with table saw blades have taught me to use a square or something like that when setting the blade angle. Whether it is 45 or 90, whatever. The scales on the saws are just not accurate enough to guarantee setting the blade by them. For rough measurements, they are good. For stuff that matters, use external reference.

-- Mike

View Cole Tallerman's profile

Cole Tallerman

389 posts in 783 days


#3 posted 653 days ago

I checked everything except the blade stop and it was dead on. I will try this weekend. What would you suggest i use as a true 45 degree angle? ive used the head of a combination square before.

View Don W's profile

Don W

14622 posts in 1165 days


#4 posted 653 days ago

I don’t own a saw stop, but I’ve yet to see a table saw (or any piece of machinery) with that kind of precision built in. You’ll need something to set the blade exactly. one of those digital blade angle readers would be one option. A good 45 degree scquare would work as well.

-- Master hand plane hoarder. - http://timetestedtools.com

View CharlieM1958's profile

CharlieM1958

15655 posts in 2816 days


#5 posted 653 days ago

Yep, you definitely cannot bank on just turning the crank until it stops.

I don’t know about the Sawstop, but with my saw, even when properly adjusted, I can throw the angle out of a perfect 45 just by turning the handle too hard or not hard enough. I always use my digital angle gauge to be sure.

-- Charlie M. "Woodworking - patience = firewood"

View Cole Tallerman's profile

Cole Tallerman

389 posts in 783 days


#6 posted 653 days ago

What digital angle gauge should i use? I just spent $2,000 on a table saw so im not looking to break the bank

View patron's profile

patron

12955 posts in 1939 days


#7 posted 653 days ago

if you have a good square

cut a board at the 45 angle
and taking the other piece
mate it to the first angle
if it is square
you got 45

if not tweak till they do 90*
(i’m sure there is an adjustable stop bolt
for the stop)

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View Don W's profile

Don W

14622 posts in 1165 days


#8 posted 653 days ago

then a plane and shooting board wouldn’t be a bad idea either.

-- Master hand plane hoarder. - http://timetestedtools.com

View shampeon's profile

shampeon

1275 posts in 781 days


#9 posted 653 days ago

One of those $20-30 digital angle gauges are pretty much perfect for this. Like a Wixley:
http://www.amazon.com/Wixey-WR300-Digital-Angle-Gauge/dp/B001PTGBRQ
I got mine for like $19 on sale.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

View a1Jim's profile

a1Jim

111999 posts in 2175 days


#10 posted 653 days ago

When cutting on a miter gauge your material will tend to crawl (move) this can change the angle and the length, it’s very critical for parallel sides to be exactly the same length.

-- http://artisticwoodstudio.com Custom furniture

View lab7654's profile

lab7654

250 posts in 845 days


#11 posted 653 days ago

I use a speed square, those are long enough to give a good idea of where you are at. They are usually pretty dead on when it comes to accuracy, even the cheap plastic ones.

-- Tristin King -- When in doubt, sand it.

View 47phord's profile

47phord

174 posts in 835 days


#12 posted 653 days ago

I always set my saw with a metal framing square I bought years ago. It’s dead-on, and I know that my saw is set right the first time.

View knockknock's profile

knockknock

182 posts in 771 days


#13 posted 653 days ago

Tallerman said: “ive used the head of a combination square before.”

As long as you combination square is not poorly made, remove the ruler and the head should have a good 45.

View crashn's profile

crashn

518 posts in 1063 days


#14 posted 653 days ago

what you did not mention is that are your cuts short (less than 45) or long (more than 45). Even when set with a guage, square or digital tool, make test cuts in scrap and sneak up on the perfect angle.

-- Crashn - the only thing I make more of than sawdust is mistakes

View GarageWoodworks's profile

GarageWoodworks

419 posts in 754 days


#15 posted 653 days ago

I NEVER trust my positive stops for blade bevel angles. It wouldn’t take much sawdust to throw off your positive stop in your table saw.

The fastest and most accurate method for checking 45 is to use a dial indicator and an accurate 45 degree reference.

-- Subscribe on YouTube: http://www.youtube.com/user/GarageWoodworks?feature=guide

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