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how to get perfect 45 degree cuts on Grizzly G0771

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Forum topic by gn1weirdness posted 09-24-2015 07:56 PM 723 views 0 times favorited 7 replies Add to Favorites Watch
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gn1weirdness

15 posts in 479 days


09-24-2015 07:56 PM

So I am working on making some boxes out of thin stock. The saw has markings on the degrees, but they seem HORRIBLY inaccurate. All my cuts seem to be taking away more stock than needed so I get imperfect 90 degree walls when matching pieces up.

It is not the end of the world, but it is unsightly to see the small gap in the edges when glued up.

Does anyone have a reliable way to measure 45 degree angles of the saw blade? Also I assume a flat tooth blade wouldn’t be the issue, but mine as well throw that in there. I am using a 10” Freud flat tooth blade.

Thanks a ton in advance.

I do have a number of tools that measure 45 degrees, but it’s hard to tell as the blade only comes out of the saw so far and I am unsure if it is actually accurate or not. I can just do test cuts until it is close, but this is just needlessly wasting lumber.


7 replies so far

View OggieOglethorpe's profile

OggieOglethorpe

1213 posts in 1578 days


#1 posted 09-24-2015 08:02 PM

1.) Are you sure the parallel sides are identical lengths? If they aren’t, you’re screwed when 4 sides come together.

2.) Are you sure whatever fixture is holding the stock being cut is moving true through the cut?

3.) Are you using a good condition blade, with no oddball or bent teeth? Does the blade have a flat plate that you can reference?

4.) Are you relying on the saw’s 45 degree stop, or checking with a good reference, like a decent combo square?

View MrUnix's profile

MrUnix

4247 posts in 1667 days


#2 posted 09-24-2015 08:13 PM

RTFM!!!

That saw has both 45 and 90 degree stop adjustments. Once you get it dialed in, you just crank until it stops and it will be dead on every time. If’s all explained in the manual... you can skip right to page 59 (Blade Tilt Calibration) if you are impatient :)

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View splintergroup's profile

splintergroup

832 posts in 690 days


#3 posted 09-24-2015 08:16 PM

Best bet for cheaply setting blade accurately to 45 or 30 degrees is to use an inexpensive plastic drafting triangle.
Look at a stationary store or a better stocked school supply area. Under $10 and typically dead-on accurate.

For bevel cuts, Raise your blade fully and tilt until the triangle edge is flush with the side of the blade (make sure the triangle is resting between the blade teeth.

For miter gauge setup, place the triangle between the miter and the blade, adjust until flush.

Oggie stated the other details, keep the workpiece secure to the miter gauge and use a stop block for equal length parts.

View jmartel's profile

jmartel

6579 posts in 1618 days


#4 posted 09-24-2015 08:32 PM

Pick up a digital angle gauge.

http://www.amazon.com/Wixey-WR300-Type-Digital-Backlight/dp/B00T6YZ0K6/ref=sr_1_1?ie=UTF8&qid=1443126666&sr=8-1&keywords=wixey+digital+angle+gauge

The stops on the saw are adjustable. Use the gauge to get to 45 deg, test cut and make sure everything fits right, and then move the stops so that you can easily get back to 45 deg. You will still want to check it each time, but that will get you the 45 deg angle you need.

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

View gn1weirdness's profile

gn1weirdness

15 posts in 479 days


#5 posted 09-24-2015 08:32 PM

Brad,

I have many a time. I think it might have been the stock not being dead on with each edge as one suggested.


RTFM!!!

That saw has both 45 and 90 degree stop adjustments. Once you get it dialed in, you just crank until it stops and it will be dead on every time. If s all explained in the manual... you can skip right to page 59 (Blade Tilt Calibration) if you are impatient :)

Cheers,
Brad

- MrUnix


View Redoak49's profile (online now)

Redoak49

1965 posts in 1456 days


#6 posted 09-24-2015 08:54 PM

Many good suggestions….

—Opposite sides must be exactly the same length
—Sides all the same width and parallel
—use a sled to cut
—I use a digital tilt box to start, make trial cuts and adjust
—I use blue masking tape to clamp sides together for glueing.

I find that it is difficult for to get it done but such a good feeling when I get it right.

Good Luck

View gn1weirdness's profile

gn1weirdness

15 posts in 479 days


#7 posted 09-24-2015 09:25 PM

It seems that the stock was just out of parallel :: (

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