Re: gEDA-user: Printer calibration issue?

[DJ Delorie <dj@xxxxxxxxxxx>]

> I used method #1, and I also turned off the auto-scaling option in
> adobe (whoops). This brings the measurements closer, but I'll need a
> better printer, a better ruler, and better eyeballs before I can be
> sure the measurements are just right.

When you get those tools, the "calibrate printer" option is there to
tweak it the rest of the way.  Mine is off by 0.4%.

> To get back to my original question: If I crop the photo of the
> board as close as I can and set the board measurements to those
> listed on the website, could I start work on the art now and worry
> about printouts later?

Yes.  Note: trust the footprints and the PCB grid to be right; use the
photo for placement hints only.

> It is all thru-hole components and nothing really smaller than the R025
> footprint in PCB. In fact, I'd appreciate it if you would have a look at the
> page I'm using as a reference, and tell me what you think: perhaps the
> measurements aren't exact? Oh, and by the way the screenshot I use is
> actually from ExpressPCB, using the .pcb file available on the site:
> 
> http://lasertagparts.com/mt5xx.htm

The problem with those photos is that they're not straight-on.  I.e.
they're trapezoids.  You'll need to use gimp or photoshop to morph
them to rectangles and remove the "perspective", plus perhaps rotate
them a bit to make them properly orthogonal.

An alternate idea is to get expresspcb's proprietary software, run it,
and take a screenshot - and use that as a background in pcb.


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