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Printing CAM Artwork in negative [message #165036] Wed, 03 February 2016 20:17 Go to next message
walid hosseini[1]
Messages: 3
Registered: February 2016
Junior Member
How can one go about printing both top and bottom sides of a board in
negative (e.g. PS_INVERTED device) so that they both appear next to each
other in one file?  If this is not possible directly within Eagle, is
there some post processing of the Postscript files that can achieve
this, so you don't have to put your transparency material through the
printer twice - or waste two sheets?

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Re: Printing CAM Artwork in negative [message #165041 is a reply to message #165036] Thu, 04 February 2016 08:21 Go to previous messageGo to next message
Joern Paschedag
Messages: 1432
Registered: August 2008
Senior Member
Am 03.02.2016 um 21:17 schrieb walid hosseini:
> How can one go about printing both top and bottom sides of a board in
> negative (e.g. PS_INVERTED device) so that they both appear next to each
> other in one file? If this is not possible directly within Eagle, is
> there some post processing of the Postscript files that can achieve
> this, so you don't have to put your transparency material through the
> printer twice - or waste two sheets?
>
> --
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> https://www.element14.com/community/message/173349
>

When I do eurocards myself I generate a second file and switch off the
corresponding schematics. With all layers on I mirror the top side and
place it next to the existing board.
After turning off unnecessary layers and doing a ratsnest I'm ready to
print.

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Mit freundlichen Grüßen / With best regards

Joern Paschedag
Re: Printing CAM Artwork in negative [message #165042 is a reply to message #165041] Thu, 04 February 2016 08:41 Go to previous messageGo to next message
Clem Martins
Messages: 251
Registered: December 2014
Senior Member
https://www.sparkfun.com/tutorials/111 see top comment

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Re: Printing CAM Artwork in negative [message #165048 is a reply to message #165041] Thu, 04 February 2016 15:30 Go to previous messageGo to next message
walid hosseini[1]
Messages: 3
Registered: February 2016
Junior Member
Thanks, and this is the normal way of printing artwork.  The question I
had was about printing both top and bottom simultaneously on one sheet,
in negative, so you don't have to feed your sheet into the printer
twice.

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Re: Printing CAM Artwork in negative [message #165054 is a reply to message #165042] Thu, 04 February 2016 21:25 Go to previous messageGo to next message
walid hosseini[1]
Messages: 3
Registered: February 2016
Junior Member
I actually figured out a nice clean way to do it. I just generate the
two negative images in two postscript files.  They look like this:
[TopAndBottom.png]
The two postscript files define some reference points and a bunch of
common functions for drawing lines, octagons, etc.  So, I just extend
the top side artwork 2X to the left, and draw the bottom side artwork in
that space.  The whole thing is done in a bash script, and the result
looks like this. 
[Combined.png]
This makes it very easy to print the artwork without wasting film, and
also to align the two sides just by folding the slide over on itself.  
Note also that there is no conversion to and from any file format other
than postscript, so there is no risk of messing up the scaling or aspect
ratio.

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Re: Printing CAM Artwork in negative [message #165055 is a reply to message #165054] Thu, 04 February 2016 22:37 Go to previous messageGo to next message
Clem Martins
Messages: 251
Registered: December 2014
Senior Member
Glad this post led you to a good solution.

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Re: Printing CAM Artwork in negative [message #170319 is a reply to message #165036] Tue, 25 April 2017 05:07 Go to previous message
jeni smith
Messages: 1
Registered: April 2017
Junior Member
Welcome to printing.com, the home of low cost, hi-definition print with beautiful design from local printing.com studios. Printers Birmingham (http://printing.com/uk/studios/birmingham-central)

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