New...Miter a 30 degree angle?? - Woodworking Talk - Woodworkers Forum
 
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post #1 of 6 Old 05-13-2009, 09:10 PM Thread Starter
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New...Miter a 30 degree angle??

Hi registered here for an answer hopefully.

I have 2 doors that meet to for a 60 degree corner (measured with a protractor). Kept trying the 30 degree setting on my Compound Miter Saw...only to go searching to learn it is from 90 with the piece.

So, here I was cutting 60 and 120 degree angles. I have that part down. So, since my saw stops at 45, and I need 2 30 degree angle is there any way to do other then using my protractor, making a mark, a vise, and my manual saw?

I tried coping...and I did it, but didn't work, the upper part (thicker [its door molding that is stepped inward]) hit and the bottom had a gap, perhaps I didn't angle the cope...but I have my Miter Saw I want to use it!

To Summerize: need 2 30 degree angles from a 10" Ryobi Compound Miter Saw.

Thanks!
Shane
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post #2 of 6 Old 05-13-2009, 10:02 PM
where's my table saw?
 
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Shane check out this thread

It's similiar to your situation. You need to make a 30 degree backer block instead of the 45 degree as shown. Then set your miter saw to 30 degrees. That should do it. bill
Angles and setting on the miter saw

bill, you dummy! If he could make a 30 degree backer block, on the miter saw, then he wouldn't need this advice in the first place!
Reluctantly, bill

There is no charge for the free advice, but you get what you pay for ... just sayin'

Last edited by woodnthings; 05-14-2009 at 11:08 AM.
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post #3 of 6 Old 05-14-2009, 01:47 AM Thread Starter
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Thanks Biil.
Looking at your example, every time I think I have the logic worked out I get confused.

So I can't make a 30 degree backing plate, other then by hand.

But if I understand the math right, making that leaves me 60 degrees to 0/90. So, then setting the table rotation to 30 cuts that in half and a perfect true 30 degrees.

Problem is I can not cut that (I can not use a saw to cut wood, only my flesh it seems or gloves if I wear them).

So I would guess my next best bet is to use the 30 degree setting, actually cutting a 60 degree angle, put the table/deck back to 0/90 and just cut that 30 degrees that way, by putting the work piece in vertically. Which brings up the issue of supporting it so it doesn't kick into the blade.

This has got the be the easiest looking corner that had been my nightmare to spackle, paint, and now try and cut a piece for.

I really do appreciate the help!
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post #4 of 6 Old 05-14-2009, 07:38 AM
where's my table saw?
 
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Thumbs down Shane, sorry I goofed!

You need to make a 45 degree backer block, like in the photo, then set your miter saw to 15 degrees. That will make a 30 degree angle on your workpiece. 45 + 30 +15 = 90. The miter saw will cut a 45.
And as you say it's difficult to hold on to it any other way. sorry, but I knew this was confusing! bill

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post #5 of 6 Old 05-14-2009, 09:55 AM Thread Starter
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Haha Wow...that was simple...45 -15....30 I don't know why I did see that and I went the whole complicated process of 60.

I think it has to do with making cut after cut, and scrap going from 2 feet, to 1 foot, then a few inches, all pulling your hair out!

You have been an amazing help, now I get to try this (after I go buy a 2x4 or 2x6 for a backer)!
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post #6 of 6 Old 05-14-2009, 11:07 AM
where's my table saw?
 
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Are you mitering this vertically?

That is standing on edge rather than laying flat and that's why you want a thicker/taller backer board? Maybe a temporary table out of plywood to support your longer workpiece. Of course it will get cut off, but if it's held to the mitersaw table with clamps or screws from the bottom that will help support it. And wouldn't you know right where you want to stand to use the saw is where the workpiece projects. Well, you get the idea now, later. bill

There is no charge for the free advice, but you get what you pay for ... just sayin'
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