Opinions Wanted Need to cut an out of square frame

Melinda Tennis

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Hi Everybody, I have a large African batik that is 37 x 46 on one side and 36 x 44.5 on the other. I am going to attempt to do the math for the angles required. Any suggestions, other than ARE YOU CRAZY?
 
The simple solution to your problem is tell the customer you will charge 10 times more to cut the frame out of square as you will to float it on mat board.
 
Cutting the out of square frame won't be much of a problem; forget the math and cut one 44" leg .5" long (or was it short). The half inch won't cause the miter to be off but by 1 or so degrees. We've done it by accident many times I'm sorry to say and no one notices untill fitting.
 
Cutting the out of square frame won't be much of a problem; forget the math and cut one 44" leg .5" long (or was it short). The half inch won't cause the miter to be off but by 1 or so degrees. We've done it by accident many times I'm sorry to say and no one notices untill fitting.


It's 1" longer on the short side and 1 1/5" longer on the long side. That's more than just a little off!


No possibility of trimming the piece, eh? ... or wrapping it to hide the "out of squareness".

Other than those ideas, then I agree, the float idea is the best.
 
I did the math out on this (thanks high school geometry!)

You can see the angles in this image.

angle-measurments.jpg


As you can tell, the most that the angle varies from 90° is by .85°.... not very much and I doubt that you have equipment that's going to be precise enough to make a difference. I have to agree with Warren in this regard... it's probably easiest to just cut the different lengths at 90°.

Or skip that all together and float it... a much simpler option.
 
Both Warren and Azoq are assuming relative symmetry. In order to get a sense of the shape, we need to know the diagonal measurements as well. That will tell us the acute and obtuse angles for the frame. The easiest way to cut the angles is with a template scribed directly from the item and a table saw with a sliding bed. You will need to make 4 jigs, one for each corner.
 
Over-size it.

You can drive yourself nuts making those cuts... and have 4 different length
sides with 4 different angles....

and it will make the cloth look great. . . as long as someone is holding it.

But the minute you hang it on the wall.... it will NEVER hang straight... no matter
how you align it... it will always be out of alignment with the ceiling, floor, doors
and window. Your customer will hate . . you . . . for . . . EVER.

Don't ask me why I know that
 
I agree with Baer (#12).
But, if you do decide to do the cut, or if you ever have a cut thats off a bit, make this tool.
If the wood is 2" thick. Get a thin piece of metal (like a cake icing spreader). Adhere sand paper to the sides(about 120 grit). Put your end together & sand till they are flush.
 
Yep, a float with good, wide, borders (at least 100mm all 'round) in a square frame is definitely the best look. Anything out of square hung on a wall with square corners will look silly. I do this regularly with horribly out of whack papyruses and so long as the base of the image is parallel with the floor all is well.
 
Thank you

Thank you all for your suggestions. All very helpful. I have a very good saw and attachments to cut the angles, so thanks for the math. The batik is way out of square at the top, so I may be able to have 2 square corners at the bottom and the top going off into the sky. Most probably I'll float it and disguise the empty parts.
 
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