On 15 Oct 98 at 8:35, Hawes, Adam wrote:

> Dennis,
> You're not alone.......
> Composite layers are when the CAM software uses several layers to
> create one artwork layer i.e. what exists as one layer in Allegro
> e.g. your power plane is made up of several layers in the CAM
> environment. (forgive me if you already knew this!)
> The fabricator only has a limited number of layers available to play
> with and we have had a problem with RS274X, especially on boards
> with several PWR/GND layers, where the fabricator has complained of
> not having enough layers to complete all the composites.
If you have access to CAM350, Version 5 or know someone who has this
SW, then you can read in the gerber file(s) which make a
composite and "flatten" the composite to a SINGLE layer, made
of flashes, draws and polygons without all that stuff like positive,
negative etc.
The next step would be, if the manufacturer cannot handle RS274X
polygons (happens, if he has old DOS Versions of ECAM or many other
CAM sowtware from the early times of RS274X - they know mostly only
embedded apertures, but not all the other stuff from RS274X), the you
can with CAM350 5.0 convert these true polygons in the well known old
"painted" polygons, built with many strokes with an aperture you can
select before.
Regards
Matthias Mansfeld
-----------------------------------------------
Matthias Mansfeld Elektronik
* Printed Circuit Board Design and Assembly
Am Langhoelzl 11, D-85540 Haar, GERMANY
Phone: +49-89-4620 0937, Fax: +49-89-4620 0938
E-Mail: [log in to unmask]
Internet: http://www.mansfeld-elektronik.de

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