Anyone here tried this for enlarging patterns/plans? - Router Forums
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post #1 of 12 (permalink) Old 02-11-2018, 08:38 PM Thread Starter
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Default Anyone here tried this for enlarging patterns/plans?

Just ran across this. Not something I would use everyday, but would help a lot with one project of mine, dunno if it would work with any others or not, but would be handy to have available, just in case.
https://www.wired.com/2008/11/blockposters/
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post #2 of 12 (permalink) Old 02-11-2018, 09:16 PM
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I tried a program like that. I don't know if it was THAT program or one like it, but I found that home printers are not accurate enough to make tiled images, without changes in ink density and other issues that make them LOOK like they were pasted together out of 8.5x11" paper.

If you are just going to enlarge a drawing to make a pattern then this should work fine.

Another way to do it is to use a digital projector. Scan an image into a black and white line art image and project it onto the surface of whatever you are making, and trace it if necessary, or there are even photo-reactive paints that will turn colors based on the amount of light that hits them before they dry, similar to how you used to develop old photographs.

I have a 5x10 CNC table, so when I need to enlarge something, I just mount a Sharpie onto my carriage and let the machine draw it to perfect scale on the material.

I also have one of the 44"x60" digitizing tablets from Logic Trace Group, but I have not yet had the time to set it up. It sits there in my shop in the shipping box ... mocking me.

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post #3 of 12 (permalink) Old 02-11-2018, 09:35 PM
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Just how much bigger do you need to enlarge your drawing Theo?

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #4 of 12 (permalink) Old 02-11-2018, 10:05 PM Thread Starter
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Originally Posted by The Hobbyist View Post
I tried a program like that. I don't know if it was THAT program or one like it, but I found that home printers are not accurate enough to make tiled images, without changes in ink density and other issues that make them LOOK like they were pasted together out of 8.5x11" paper.

If you are just going to enlarge a drawing to make a pattern then this should work fine.
Right now I've got the pattern glued down to 1/2" plywwood, 48" tall, this is the beginning step in making a master. The pattern was copied, piece by piece and glued down, closely enough you can hardly see the joints, unless you look close. Well, that printer went south, and the computer the original was on joined the printer. If I could take a picture of it, then color the picture, that would help, but not doing well on coloring images. Also, would need to print each part on 8.5X10" paper - and my printer/computer refuse to let me enlarge. The first one I did, but 2' instead of 4' was hand painted - which is a bit of a PITA, but at least I know it will come out right.

So, if I can enlarge the picture of the drawing, that would be acceptable, can paint it at least. But would I be able to print individual parts, then glue them together, or would the whole thing need to be printed on a single piece of paper?

If nothing else, I can always trace the pattern, glue the tracing down, and paint. Which would mean I would have to trace every single one. And it is a bit complex. Aaargh.

Ah, just struck me. I can get a huge rubber stamp made, and simply stamp the design, then just need to paint.
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post #5 of 12 (permalink) Old 02-11-2018, 10:15 PM Thread Starter
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Just how much bigger do you need to enlarge your drawing Theo?
Well, as I said, the drawing/pattern is glued to my plywood, which will wind up being my master. So it just needs to be the same size. Which is 48" tall, and a hair under 11" wide.

What I really want to do it take a picture, chop it up, then print each section separately, at just the right size. Then can glue them down.

Which give me an idea. I'm thinking I can either take pictures of each section want to copy, save them, fine tune them a bit with edit, then print them out separately, trim them, and glue them down. Might have to change the size of my master a hair, but not a biggie that. Or, can trace the while thing out, cut the tracing up, take pictures of each piece, then print, etc.

And the flash quit on my camera, and my camera doesn't take that good of pictures. Damn, hate to put out money for a camera. Bah. Humbug.

Got a lot of homework to do on this one.

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post #6 of 12 (permalink) Old 02-12-2018, 01:01 AM
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Taking a photo and scaling it to the right size can be very tricky. If I'm not mistaken the camera has to be a specific distance from the piece and perfectly vertical and as the object nears the periphery of the field of view the lens will start to stretch the object. I used to have a good windows based CAD program and it would ask me what scale when I wanted to print something and one option was scale to actual size. On something like one of your canes, if you are using one of the old dot matrix printers with fan fold type paper it would print it as one continuous piece. With sheet printers then you get multiple sheets. I still have the printer but I can't run the program anymore but it was good for making full size patterns of legs and spindles.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #7 of 12 (permalink) Old 02-12-2018, 08:08 AM
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Where are you located JOAT? I would like to help you with this if you are anywhere close to me. (Franklin, KY 42134)

Can you post a photo of the pattern you are trying to reproduce so we can see what you are dealing with?

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post #8 of 12 (permalink) Old 02-12-2018, 08:10 AM
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if you prop up the plywood perfectly vertical, and take a photo of it with a high megapixel digital camera and telephoto lens from some distance away, you will get a good, proportional photograph of the image. The farther away you are, the less chance of distortion.

It is also possible to exactly reproduce the image using a hand document scanner and a jig to align the individual strip scans, to get the perfect trace.

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Last edited by The Hobbyist; 02-12-2018 at 08:12 AM.
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post #9 of 12 (permalink) Old 02-12-2018, 08:38 AM
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I have had good prints using a freeware program Easy Poster Printing. It takes a little time to learn to tweak to obtain correct scale / size.
Can be found at http://www.gdsoftware.dk/

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post #10 of 12 (permalink) Old 02-12-2018, 08:40 AM
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Lotta guys use Rapid Resizer.
https://www.rapidresizer.com
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