I am trying to cut a compound bevel cut with my miter saw. I am making frames to hold lattuce on a decks railing. Where the rail top meets the post it is connected to at 39 degrees, at this meeting point I need to cut an angle from each piece to complete the 90 degree corner. I remember there was a formula,.. can anyone help?
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Replies
Not sure I understand the Q.
If the corner is 90° why would the rail meet it at 39°
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Under general discussions there is a thread "finding angles" where a few of us are talking about it. I have a drawing there also.
I think he's got a 39 degree cove meeting in a 90 degree corner. Others seem to be telling him to stand the cove up and cut it, rather than cut it laying on its back.
Having miscut my share of miters, it all gives me a headache.
If I understand you right the cuts should be the same as crown moulding.
Hence,
miter = tan-1( sin(material angle 39°) / tan( wall angle 90° / 2 ))
bevel = sin-1(cos(material angle 39°) * cos( wall angle 90° / 2))
Miter=32.18°
Bevel=33.33°