Homebrew PCBs

Hello Steve,

  Saturday, March 19, 2005, 2:36:30 AM, you wrote:



S> That can make a really huge file if your board is very big. 4x5 inches
S> at 1200dpi is 20 x 1,440,000 = 2.88 x 10^10 or about 30 Meg (assuming
S> greyscale). If your laser printer does not have 30 Meg, it won't print.

S> Someone who knows tell me- is the file converted to BW by the driver
S> or the printer itself?

S> Vector formats are superior to raster, if you can use them.

S> http://www.polyphoto.com/tutorials/VectorVsBitmap/

S> Steve Greenfield



  For PCB artwork, if you must use bitmap images, make them BW. They occupy less space. 4"x5" BW occupies some 3.4 Meg, GREYSCALE-4bit 13.7 Meg, GREYSCALE-8bit 27.4 Meg.

Think of ONE reason for having the PCB artwork made as greyscale image!

All written above was just tested on my computer.

For making my prototype boards, I print the copper layers through the PostScript printer driver to a PS file which I import to CorelDraw, tweak a little (fonts, logo, etc.) and then I give the CDR file to a friend running a prepress company to produce the graphic film. (You've guessed good - I use photo method for board production).


-- 
 Sincerely,
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