Re: gEDA-user: Printer calibration issue?

[DJ Delorie <dj@xxxxxxxxxxx>]

To use the background image feature, you must do one of two things:

1. Crop the background image to the exact outlines of the picture of
   the board.  Then, when you set the PCB board size, the picture
   scales to the same PCB size.

2. Crop the background image to some multiple of the picture of the
   board; for example, twice the number of pixels as the picture
   needs.  Then, set the PCB board size to twice the needed board
   size, so that the PCB board size and the photo's size are both the
   same multiple of the desired board.

As for printing...

If you set the PCB board size to 3.1 by 1.65 inches (ignoring the
background image for now), it should print at exactly 3.1 by 1.65
inches.  Manually include a 40 pin DIP for calibration; even if you
get the board size wrong the DIP should print with 0.1" centers.

When you print from PDF, be sure the PDF viewer will not scale the
pages.  For example, Acroread has a "shrink to fit" option which
changes the size of the board.  You wnat "shrink to fit" and "expand
to fit" both OFF if you want accurate prints.


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