> From: Francisco Sim�es [mailto:[EMAIL PROTECTED]]
> Sent: 06 July 2001 06:01
> To: Protel EDA Forum
> Subject: [PEDA] Schematic directives
>
>
> Hi group.
> I�m new to Protel and I�m facing the following problem:
> Every time I try to use schematic design directives, in order
> to define track widths and via diameters in the schematic
> window, for the PCB layout, nothing happens.
> On the properties dialog box for directives, I fill the track
> and via�s fields, with values beeing folowed by the sufix mm
> (I work in the metric system), and if I reopen this same
> properties dialog box, my values will be missing, and the old
> default values will insist to reapear.
> If I dont use any sufix, my values will stay there.
> By not using any sufix, the imperial system is assumed, I supose.
> So, my first tought was:
> "Well, there�s some bug unabling me to use the metric system
> here, so I will use imperial units instead". But doing this,
> will not cause any effect on the PCB layout after updating
> and autorouting my design.
> What could be happening here?
> Could it be some kind of a bug, or am I missing anything else?
> I�ll apretiate any help.
Francisco
Protel has never had metric support within schematic. At least not from P98
onwards when I started using it.
For normal drafting I can see their rationale as no dimensions need exist in
schematic and therfor no units support.
But as this applies to objects within the SCH you can not use metric values
in PCB directives.
Coming from a background of using software that allows for complete Design
Rule set and individual net attributes [PCB directive] to be defined within
schematic, included in Netlist and auto-loaded into PCB I find the lack of
that feature leaving Protel SCH capture wanting.
The ability to define complete DR sets and make use of PCB directives
properly, is one of the most counter productive features within the Protel
enviroment. Why have automated netlist transfer and forward/back annotation
but must define DR manually in PCB package while reffereing to SCH. For
those of us who may have SCH and PCB as 2 different departments its a
nightmare as manual documntation [outside normal RCS] becomes a bind.
Best Regards
John A. Ross
RSD Communications Ltd
8 BorrowMeadow Road
Springkerse Industrial Estate
Stirling, Scotland FK7 7UW
Tel +44 [0]1786 450572 Ext 225
Fax +44 [0]1786 474653
GSM +44 [0]7831 373727
Email [EMAIL PROTECTED]
WWW http://www.rsd-communications.co.uk
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