Re: gEDA-user: gerber outlines

2011-01-24 Thread Kai-Martin Knaak
Rob Butts wrote:

> So if in preferences I set the board size to 1550 x 1550 and draw on an
> outline layer a 1500 x 1500 outline the board size will be 1.5" x 1.5"?

Yes. (Unless you set the  unit to "mm"...)

---<)kaimartin(>---
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Email: k...@familieknaak.de
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Re: gEDA-user: gerber outlines

2011-01-24 Thread Rob Butts
   Thanks everybody!

   On Mon, Jan 24, 2011 at 12:53 PM, DJ Delorie <[1]d...@delorie.com> wrote:

 At fabs, there's almost always a human looking at the outlines.  In
 the no-touch cases I've seen, they always spec "the centerline of a
 10
 mil line" as the outline.  Our fab drawing says exactly that too.

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References

   1. mailto:d...@delorie.com
   2. mailto:geda-user@moria.seul.org
   3. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user


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Re: gEDA-user: gerber outlines

2011-01-24 Thread DJ Delorie

At fabs, there's almost always a human looking at the outlines.  In
the no-touch cases I've seen, they always spec "the centerline of a 10
mil line" as the outline.  Our fab drawing says exactly that too.


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Re: gEDA-user: gerber outlines

2011-01-24 Thread Stephan Boettcher

> ... you can either rename a layer ...

 ... you can either rename an unused empty layer ...

> ... that exclusively contains the objects in the outline layer. 

 ... in particular, no vias and pins.

> ... the width of the lines does not matter. The fab will cut the board
> at the center of the lines.

Is this universally true?  

At least our milling machine mills the outline on the outer edge of the
lines.  The guy who runs the machine says, he cannot easily tell the
programm to mill along a center line.

I prefer to keep the line width within tolerances to both sides, so if
the fab ignores my README specifying the centerline, it is no big deal.

-- 
Stephan 


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Re: gEDA-user: gerber outlines

2011-01-24 Thread Rob Butts
   So if in preferences I set the board size to 1550 x 1550 and draw on an
   outline layer a 1500 x 1500 outline the board size will be 1.5" x 1.5"?

   On Mon, Jan 24, 2011 at 12:29 PM, Kai-Martin Knaak
   <[1]kn...@iqo.uni-hannover.de> wrote:

   Rob Butts wrote:
   > The help link above makes it sound like PCB will generate the outline
   > automatically to the 'outline' layer absolute edge.
   >

 I tried to make the text more help text explicit:

   [2]http://geda.seul.org/wiki/geda:pcb_tips?&#how_do_i_make_a_board_outl
   ine_to_go_with_my_gerbers_to_the_board_maker

 ---<)kaimartin(>---
 --
 Kai-Martin Knaak  tel:
 +49-511-762-2895
 Universität Hannover, Inst. für Quantenoptik  fax:
 +49-511-762-2211
 Welfengarten 1, 30167 Hannover
 [3]http://www.iqo.uni-hannover.de
 GPG key:
 [4]http://pgp.mit.edu:11371/pks/lookup?search=Knaak+kmk&op=get

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References

   1. mailto:kn...@iqo.uni-hannover.de
   2. 
http://geda.seul.org/wiki/geda:pcb_tips?&#how_do_i_make_a_board_outline_to_go_with_my_gerbers_to_the_board_maker
   3. http://www.iqo.uni-hannover.de/
   4. http://pgp.mit.edu:11371/pks/lookup?search=Knaak+kmk&op=get
   5. mailto:geda-user@moria.seul.org
   6. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user


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Re: gEDA-user: gerber outlines

2011-01-24 Thread Kai-Martin Knaak
Rob Butts wrote:

> The help link above makes it sound like PCB will generate the outline
> automatically to the 'outline' layer absolute edge.
> 
I tried to make the text more help text explicit:
http://geda.seul.org/wiki/geda:pcb_tips?&#how_do_i_make_a_board_outline_to_go_with_my_gerbers_to_the_board_maker

---<)kaimartin(>---
-- 
Kai-Martin Knaak  tel: +49-511-762-2895
Universität Hannover, Inst. für Quantenoptik  fax: +49-511-762-2211 
Welfengarten 1, 30167 Hannover   http://www.iqo.uni-hannover.de
GPG key:http://pgp.mit.edu:11371/pks/lookup?search=Knaak+kmk&op=get



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Re: gEDA-user: gerber outlines

2011-01-24 Thread Stephan Boettcher
Rob Butts  writes:

> I'm trying to provide Dorkbot PDX with gerbers for a two-layer circuit
> board.  They require an outline gerber so I followed the
> http://geda.seul.org/wiki/geda:pcb_tips#how_do_i_make_a_board_outline_to_go_with_my_gerbers_to_the_board_maker
> instructions
> by naming the active layer which for me was the component layer 'outline'.

No.  You need to add an extra outline layer, which is empty except for
the board outline, which needs to be drawn as a closed seqence of lines
(and/or arc?).

> I then exported the gerber file and the outline gerber still shows nothing.
> The help link above makes it sound like PCB will generate the outline
> automatically to the 'outline' layer absolute edge.

No such automatism.

> Do I have to draw these lines in or does PCB do this and what should I see
> when viewing the outline gerber layer?

Yes, you need to draw them.

The fab gerber includes an outline trace, which is the 'absolute edge'
of your design when there is nor outline layer.

-- 
Stephan 


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Re: gEDA-user: gerber outlines

2011-01-24 Thread DJ Delorie

That's the way to do it.  Try checking the "all-layers" option.  Also,
watch out for spaces or capitalization in the "outline" name.


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gEDA-user: gerber outlines

2011-01-24 Thread Rob Butts
   I'm trying to provide Dorkbot PDX with gerbers for a two-layer circuit
   board.  They require an outline gerber so I followed the
   [1]http://geda.seul.org/wiki/geda:pcb_tips#how_do_i_make_a_board_outlin
   e_to_go_with_my_gerbers_to_the_board_maker instructions by naming the
   active layer which for me was the component layer 'outline'.  I then
   exported the gerber file and the outline gerber still shows nothing.
   The help link above makes it sound like PCB will generate the outline
   automatically to the 'outline' layer absolute edge.



   Do I have to draw these lines in or does PCB do this and what should I
   see when viewing the outline gerber layer?



   Thanks

References

   1. 
http://geda.seul.org/wiki/geda:pcb_tips#how_do_i_make_a_board_outline_to_go_with_my_gerbers_to_the_board_maker


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