These jigs are the bees knees - Page 20 - Router Forums
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post #191 of 221 (permalink) Old 09-17-2017, 09:45 AM
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Originally Posted by Joe Lyddon View Post
I didn't KNOW that!

I did not know how to calculate the Segment angles & how to compare to the MiterSet Standard jig...

I'm happy that I got both... I'll skip the Math part!

Glad it worked good for you!

I almost got to cleaning the shop... other things took priority...

Hope to get to it REAL SOON!

I have two wheels to be made too... I was thinking about maybe 10 segments...
They're not marked as such, but I'm assuming that the two unmarked holes on the bottom of the segment jig can be used to set the miter gauge to 90. I'll have to give it a quick check the next time I have it out.
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post #192 of 221 (permalink) Old 09-17-2017, 12:00 PM
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This is one of those topics that never dies. The idea of getting perfect miter angles is very appealing to anyone who has ever tried to do it without special jigs and tools. Certainly a worthwhile tool. One has to be thankful a tool maker is producing such a well designed and manufactured product.
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post #193 of 221 (permalink) Old 09-18-2017, 12:57 PM
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Segment angles are easy divide 360 by how many sides you have and the angle is half of that total because that angle is complementary angles. Which for a 8 segment angle is 45 and half is 22 1/2 degrees. For the oddball 7segment 51 .429 half that is 25.5 + .214 = 25.714 degrees.
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Last edited by roofner; 09-18-2017 at 01:02 PM.
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post #194 of 221 (permalink) Old 09-18-2017, 01:19 PM
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Segment angles are easy divide 360 by how many sides you have and the angle is half of that total because that angle is complementary angles. Which for a 8 segment angle is 45 and half is 22 1/2 degrees. For the oddball 7segment 51 .429 half that is 25.5 + .214 = 25.714 degrees.
I thought the calculation was:

Cutting Angle = (360/N)/2

N = # of segments.

I learned that from this thread...
What is your .214 for the 7 segment calc.?

The way you would set the MiterSet Standard angle?

Have Fun,
Joe

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post #195 of 221 (permalink) Old 09-18-2017, 04:50 PM
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Joe, number of segments is the same as number of sides. eg for a 4 sided shape or 4 segments 360/4 = 90 then divide by 2 = 45. So each segment needs to be cut at 45 which we all know.

For 7 sides 360/7/2= 25.71428571428571
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post #196 of 221 (permalink) Old 09-18-2017, 09:24 PM
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My calculations was based on the comments that was to 3 decimal points.
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post #197 of 221 (permalink) Old 09-18-2017, 09:39 PM
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This is why I ask why buy both ? I want to see you use the kludge bar set your angle to cut 7 segments.
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post #198 of 221 (permalink) Old 09-18-2017, 11:45 PM
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@roofner Why buy both? Because I can. That's reason enough for me. And, we are both right because you don't necessarily need both, although a tiny error is enough to ruin a frame, especially if you're fussy about miter fit.
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post #199 of 221 (permalink) Old 09-19-2017, 04:00 AM
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I bought the segment jig for the ability to cut"odd" segments if needed, but it appears that it will also work for those other common angles used - definitely 45 (picture frame), 30 (hexagon) and 22-1/2 (octagon) - and hopefully can also be used for squaring the miter gauge (haven't had a chance to check that yet) - so it appears that the segment jig gives you the best of both worlds.
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post #200 of 221 (permalink) Old 09-19-2017, 09:32 AM Thread Starter
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Quote:
Originally Posted by roofner View Post
Segment angles are easy divide 360 by how many sides you have and the angle is half of that total because that angle is complementary angles. Which for a 8 segment angle is 45 and half is 22 1/2 degrees. For the oddball 7segment 51 .429 half that is 25.5 + .214 = 25.714 degrees.
It's one thing calculating the angle but a totally different thing setting the mitre gauge where decimal points are involved, hence the beauty of these mitre gauges.

Harry



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