Gentlemen, I have an issue. After two days of trying to cut a compound miter, a task I thought would be a no-brainer, I left my shop weeping openly and without shame. The issue is that I do not know how to do what I want to do. Let me explain.
I want to make a serving tray with a 10° bevel on the bottom with standard 45° mitered corners. This should be a piece of cake; instead, it is a nightmare. I need your help. Teach me, mold me, show me the way.
I appreciate any help you can provide.
DrFry
Replies
Look for FWW #158, page 64. Steve Brown has an article explaining how to make the compound miter without using any math.
Got the article and will be trying it out tomorrow. Thank you so much.
Read article 154 on pages64-67 and made the block; bingo, bang, bongo, nailed it on the first attempt! Thank you so much.
Trying to cut it with what?
Table saw
Trying to do this project on the table saw.
Check out the compound miter calculator at this website. I think the N-sided Box calculator would cover your requirements.
https://jansson.us/jcompound.html
I tried that before I came here. I failed with the miter calculator. This is not to say that the next guy will not succeed, but I was unable to work the numbers successfully. Thank you for sending me the info on the calculator, though. Perhaps, once I have succeeded in this project, the calculator will make more sense to me.
You could try to jig it up. A tablesaw mitering sled with the uprights leaning back at the angle you want might-could-maybe do the trick. Drawing would not load earlier... here ya go.
I have this type sled. I am going to try it out with the block I made from Article 158, pts. 64-67.
Here is one more thing to check:
Even though your blade is perfectly parallel to the miter slots when it's at 90 degrees, it might not be parallel when you tilt it over at 45 degrees.
This was the situation with my Unisaw and the solution was to add shims between the cabinet and the table while testing with a dial indicator.
Other saws may have different adjustment procedures.
Just a thought.
Mike
Pictures here would be helpful, but if it is what I am picturing, a tablesaw isn't a very good tool for that job whereas a chopsaw is literally made to do exactly those kind of jobs.
One thought... Consider mitering the corners with square stock, gluing the whole piece up, and then doing the ten degree bevel after glue up.... That its what I do when making smaller picture frames and want a back bevel on the sides...
I went back to the online calculator and got from the Compound angle 2 calculator a blade tilt of 7,1 degrees and miter angle of 44,6 degrees. I then searched for other calculators and found one on the woodworkers guild of Georgia site and got 7,05 degrees on the blade and 45,4 on the miter, they however indicate how the angle on the miter is being taken and since 45,4 + 44,6 = 90, they used a different reference. I then went to woodgears who go by a table, again their reference in different but it’s about the slant angle, which is taken from horizontal so you have to use 80 degrees slant and you get 44,56 miter angle and 7,05 degrees blade tilt. All the same, different reference axis.
Thank you all for your kind attention to my issue. FWW article 158 @pages 64-67 did the trick for me.
I remain,
Richard-Wayne: Fry
Overseer
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