PCB design tool that I use previously, automatically included board outline in one photoplot file only.
It was drill drawing image.
All other photoplots were generated without board outline.
OrCAD PCB Editor doesn't include board outline in default films for all etch subclasess.
Is board outline required in at least one photoplot file?
Are corner marks placed on all layers useful (helpful) for board fabricators?
That would be correct,
The Board Geometry Outline on an etch layer would end up as a sliver of etch around the board edge, this would be undesireable.
You can add another film to the output to include the Board Geometry>Outline class / subclass and provide this with the etch data and, indeed, with any other films that you want to output. Since the Board Geometry>Outline has a 0 width, you will need to provide a value for the "Undefined Line Width" for the film.
You might want to clarify with you fabricator, what data he is expecting you to provide.
In reply to oldmouldy:
Hi, i tried to include the BOARD GEOMETRY/OUTLINE in the top and bottom film and set "undefined line width" to 1 in the artwork control box but when i try to view the gerber, i cant see the board outline. My PCB house told me that they cant see the board outline.
Do i need to include another film just for the board outline or can i just add the BOARD GEOMETRY/OUTLINE subclass to the top and bottom film. But i stil cant see the board outline... how should i go about this?
In reply to hohk:
Try making the width bigger. It would depend on your design and artwork units. You say 1. If that is in mils then I would set it to at least 6 mils. A tip might be to create a TOP.art which includes etch/top pin/top via/top. BOTTOM.art which has etch/bottom pin/bottom and via/bottom. CRT.art wihich includes board geometry/outline. You might also need to include a soldermask top and bottom and a silkscreen. Have a look at Kraig Mitzners new book Complete PCB design using Orcad Capture and PCB Editor. Not only does he talk you through the software side. He also explains manufacture, board setup etc.
In reply to steve:
Hi Steve,when i created the board outline artwork (film with only the board geometry/outline subclass) and with "undefined line width" set to 10 just to test(my system and output units are in mm), i still cant see the board outline in the gerber viewer.
Can you take a look at my .brd? I missed out something? Thanks.
This is really strange. The Board outline artwork was being created but it but when you examine the art file it was empty. I managed to cure this by adding a photoplot outline. To do this add rectangle then change the class/subclass to manufacture/photoplot outline and draw the rectangle to enclose your board outline. Then your artworks will be created. I would suggest changing your undefined line width (as you have mm you probably only need 0.5 or 1mm as the thickness).
If anyone has suggestions I'd be interested to see..... I tried increasing page size both in design and artwork, moving origin. Recreating the board outline and the artwork....... The only cure was the photoplot outline.
I also have been trying to find a way to produce a board outline in gerber format. I was unable to get the outline to appear using the photoplot outline technique. Has anyone found a solution to this problem yet?
Good Day to all!!
I am creating Negative art file but ,I can't go threw it,
Please send us its topology to create.
WARNING: database resolution exceeds the resolution of the
output coordinates (see FORMAT in parameter file).
Some roundoff of coordinates may occur unless the number
of decimal places in the output file is increased."""
""ARNING: for raster artwork formats, artwork accuracy must be
at least one place greater than the database accuracy, up
to the maximum accuracy allowed by the selected output format.
Increase the accuracy by increasing the "Decimal Places" in
the FORMAT section of the artwork parameters and then rerun
The current output is rounding down the data. Failure to change
the format may result in inaccurate arc coordinates in the output
files and possible shape/void plotting failures.
there is some minor eror bt i can't solve it.
TYPE SIZE/NAME ROT MIRROR MODE
RECTANGLE 0.12283 x 0.08346 0.000 NO DARK
TOP created with warnings
PROCESSING FILM < BOTTOM >
TO FILE < C:/Cadence/SPB_16.5/tools/capture/allegro/BOTTOM.gtd > ...
FILM PARAMETERS :
Undefined line width 0.00
Suppress shape fill on neg film NO
Mirror code NONE
Rotate angle NONE
Offset x: 0.00
Offset y: 0.00
Plot negative YES
Suppress unconnected internal pads NO
ERROR: aborting film - Layer polarity of layer ETCH/BOTTOM does not
match film polarity of Negative. DRC may be unreliable.
CIRCLE 0.10000 DARK
RECTANGLE 0.12598 x 0.08661 0.000 NO CLEAR
Error in BOTTOM--halting output. Artwork file not generated.
*** ERROR with BOTTOM
TOP created with warnings
*** ERROR with BOTTOM