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What's the most accurate way to measure apex of the blade on table saw?

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Forum topic by Loki_Lumber posted 04-16-2018 12:55 PM 621 views 0 times favorited 10 replies Add to Favorites Watch
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Loki_Lumber

3 posts in 96 days


04-16-2018 12:55 PM

Topic tags/keywords: jig question measure table saw

I’m making a jig where I need to center something right over the cutting line and apex of the blade (center of arbor?)

I can take a rough eye-balled guess at it, but can’t think of a good technique for measuring this on my table saw.

Any suggestions?

Thanks,
-Loki


10 replies so far

View adot45's profile

adot45

108 posts in 678 days


#1 posted 04-16-2018 01:03 PM

I use a sled to true up segmented halves. If I understand your question.

-- David -- sent from my linux box

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PPK

1080 posts in 863 days


#2 posted 04-16-2018 01:19 PM

drop a framing square through the insert and center it on the arbor, then make a line on your insert where the square comes through?

-- Pete

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jbay

2430 posts in 953 days


#3 posted 04-16-2018 01:46 PM

Depends on the type of table saw you have.
On my Delta unisaw the center changes as the arbor is raised.

You can put a piece of veneer or laminate over the throat plate and raise the blade through it to the height you are going to use it at, then find the center of your cut.

View Dustin's profile

Dustin

535 posts in 794 days


#4 posted 04-16-2018 02:17 PM

I hope this is clear, but I have a suggestion:

Move your fence close-ish to the blade, butt a small piece of scrap ply against it and over the throat plate. Place a witness mark on the scrap and your fence for alignment later. Raise your blade to the necessary height to cut the scrap, use a square to transfer the edge of the cut to the edge of the board, and then onto your fence (masking tape is your friend). Split that distance to get your center, and you can use your fence to line it up. Make sense?

-- "Ladies, if your husband says he'll get to it, he'll get to it. No need to remind him about it every 6 months."

View Woodknack's profile

Woodknack

12061 posts in 2434 days


#5 posted 04-16-2018 07:14 PM

You can either remove the blade and make an L piece to measure equidistant points from the arbor. But you also need a way to align your stock. So if you set registration tabs equal distances from the arbor in all directions, you can align a square piece of stock. Is this for bowl making?

-- Rick M, http://thewoodknack.blogspot.com/

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Loki_Lumber

3 posts in 96 days


#6 posted 04-16-2018 07:26 PM

Thanks for the suggestions everyone, I got it figured out.

Woodknack – it is for bowl making, turned out great and felt safe during the entire process. Nice shallow cuts are the key, only took me about 8-10 min if that. Working out of the garage and don’t have the room/money to buy a lathe but really wanted to attempt making bowls. So far, so good.

View jbay's profile

jbay

2430 posts in 953 days


#7 posted 04-16-2018 10:33 PM

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Loki_Lumber

3 posts in 96 days


#8 posted 04-16-2018 10:37 PM

Nice! I’m working on building the second jig to cut the outside cope.

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jbay

2430 posts in 953 days


#9 posted 04-16-2018 11:03 PM

I just did some miter cuts. then embellished it with some walnut.

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Richard Lee

130 posts in 829 days


#10 posted 04-17-2018 12:00 AM

Coping like that scares me,if it were to grab !!!!
Nice bowl though.
You can also lower your blade and make your circle,measure the cut from the edge and move accordingly.

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