Help me with printing a PDF? (speaker related)

[peace brainerd]

Lots of people much brighter than I am on this forum. I'm trying to print the following pdf... http://zaphaudio.com/WaveguideTMM-profile.pdf ...to correct scale. Printing to scale has to be one of the greatest frustrations. I realize that screen resolutions and printer drivers/software can really complicate this. But is it possible? I just want to get it about 98 percent accurate.

[jleaman]

Might help more if you post the printer and version of os your running!

[Flaesh]

100% & 98%

[planet10]

Standard procedure is:

1/ print the document
2/ take a ruler see how close it is
3/ take the measure and the data in the doc and do the math
4/ resize the document and print again
5/ repeat as needed

OS & printer is info not required. Having an ap that will scale the doc independently x & y is.

dave

[Inductor]

Originally Posted by planet10

Standard procedure is:

1/ print the document
2/ take a ruler see how close it is
3/ take the measure and the data in the doc and do the math
4/ resize the document and print again
5/ repeat as needed

OS & printer is info not required. Having an ap that will scale the doc independently x & y is.

dave

Another procedure (information), this one when you are sending the design to a scaled drawing (Architecture, Engineering) and when using "Free" Google SketchUp to buy the software. Then you get the LayOut (SketchUp) tool for data export/print and you print all the formats to scale, like the PDF's (being one of them).

[peace brainerd]

Thank you for removing last night's post. I really must stop drinking and posting. My apologies to everyone who had to witness that.

[peace brainerd]

Flaesh, please please tell me what program you used to create the file attached above? I've tried dia, sketchup, and half a dozen various pdf editing downloads from tucows and elsewhere to no avail. That file printed on my printer EXACTLY to the right dimensions. I've posted this question now on no less than five other forums and stumped everyone so far. Some have even suggested that you could not have done what you did. But you did. What did you do?

[planet10]

Adobe Illustrator would do it.

Photoshop would do it (althou not as elagantly)

dave

[Flaesh]

or Corel Draw, or another (?) vector graphic application..
or another perverted methods - e.g. print\scan\scale in Paint\print again..

[peace brainerd]

I realize that few people have many machine tools, but I'll mention this just in case anyone is interested.

I fabbed a very quick and dirty (but accurate) router bit out of angle iron. I've got a lathe, but I actually thought this might be easier, more repeatable, and, well, interesting to try.


click for bigger image

Just standard angle iron "wings" cut with the waveguide profile, tig welded onto a length of 1/2 inch rod. Welded one side - mounted it in the drill press - put the negative profile from the scrap I just cut out in a clamp to to set the exact height and angle of the wing - rotated the bit 180 degrees - set up the other wing against the clamped profile - and then tigged that on. Perfect. Got the edge red hot and oil quenched it. I had no idea if this would actually work in MDF so I didn't want to get too pretty with it.

The whole idea here was to be able to make a waveguide in any baffle with just a drill press. I stacked two 3/4 inch scrap of mdf and drilled a 1/2 inch guide hole through. I set up the fabbed bit so it was partly guided into the hole and clamped the mdf. About 700 rpm. I was worried that it would either take a very long time, or that the steel would dull very quickly. I was very pleasantly suprised. It did a fantastic job!

Now I can get started on this project in earnest.