Trying to figure compound miters

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Forum topic by pops64 posted 07-02-2014 07:40 PM 880 views 1 time favorited 4 replies Add to Favorites Watch
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3 posts in 1425 days

07-02-2014 07:40 PM

I’am trying to make a 4 sided lamp shade with a 20 degree slope and been trying to get the blade angle and miter gauge angle . I’ve been doing trial and error and cant get it just right do not want but joints . downloaded 3 different charts for this and each one is different . I made one of these 30 yrs. ago in wood shop and cant remember the numbers. and dont know which chart to trust. If someone knows please help this is a gift and I’am running out of time. thanks pops

4 replies so far

View LeTurbo's profile


226 posts in 1586 days

#1 posted 07-02-2014 08:09 PM

View NoThanks's profile


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#2 posted 07-02-2014 08:18 PM

I get 43.22 deg miter
14 deg bevel
on 2 different calculators

-- Because I'm gone, that's why!

View pops64's profile


3 posts in 1425 days

#3 posted 07-03-2014 12:13 AM

thanks guys I’ll try these numbers there different from the charts Ifound.

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1062 posts in 2850 days

#4 posted 07-03-2014 12:23 PM

I had a similar challenge, LJ Dallas sent me to this link, worked like a charm, but, of course, it also showed me how out of whack the scale on my MS was, It took 4 prototypes to get to the settings to dial in for my final piece, but then I’m nowhere near a machinist for accuracy, 1/2 degree angles are tough.

Compound Miter calculator

-- I've decided 1 mistake is really 2 opportunities to learn.. learn how to fix it... and learn how to not repeat it

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