[time-nuts] HP E1938 Web Page
SAIDJACK at aol.com
SAIDJACK at aol.com
Wed Aug 29 00:44:56 EDT 2007
In a message dated 8/28/2007 20:46:14 Pacific Daylight Time,
jgd at johngsbbq.com writes:
>Whythahell would anyone convert a nice compact and effectively infinite
resolution
>vector file into raster? The file size blows up to something huge and the
resolution
>is then fixed at whatever DPI was chosen. If the file needs to be
rasterized for
>printing then the proper place for that to be done is in the printer
driver.
>Presumably the printer driver writer knew how to optimize the conversion
for his
>hardware.
Hi John,
ok, I guess my comment about 600dpi PDF files being sufficient for the job
is not resonating here. Case in point:
At a previous employer, our boss insisted "vector is the only way to go" for
schematics and other images. So when we did documentation in Framemaker
(under Linux I must add) we added DXF vector files for the schematics as required.
The result was a disaster: Framemaker 6 totally butchered our schematics.
The DXF files themselves were not the issue.
I attached an example of the "index" page from that document to this email.
The font size and position was totally off as you can see. While I cannot
send out schematic pages, you can imagine how horrible the rest of the pages
look.
Attached also find the same page rendered in 600dpi PDF. Perfect.
All images rendered in 600dpi are pefect in that doc, the vector files are
at a minimum questionable in quality.
>Presumably the printer driver writer knew how to optimize the conversion
for his
>hardware.
While there are obvious applications for vector files, they can create huge
headaches due to bad printer drivers or renderers that "don't know" or don't
have the right font etc. Again there is no holy grail, just different
advantages for different situations.
Since we don't plan to re-build the E1938A PCB's here (or do we?) I don't
think vector files for simple PCB silkscreen images that are probably ok in
150dpi are an absolute must and raster files are "junk".
Some folks commenting here about the absolute need for vector files don't
even seem to have an E1938A or a need for it's documentation.
I personally would prefer some "low tech" JPEG pictures of the E1983A hookup
rather than "infinite" resolution HPGL files of silkscreens etc that are not
very helpful in using the unit.
bye,
Said
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