[PCB_FORUM] Re: excellent point Andrew!
- From: "Gene Carman" <gcarman@xxxxxxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Tue, 8 Jun 2004 10:43:27 -0700
Actually on the plus side for Allegro, they do have an excellent means of
height control... including both min and max height. Most other PWB tools just
have "height..." making it impossible to put comps under comps without rules
violations.
There are really two issues: actual component heights and what is allowed
where. As you mentioned: low to low, high to low, high to high; and of course,
what can goe under what.
Now if min/max height was just a variable... that could be read from your
catalog... after all, all 0402s are not created equal. (or worse, tant. caps)
-----Original Message-----
From: Kevin McCowan [mailto:kmccowan@xxxxxxxxxxxxxx]
Sent: Tuesday, June 08, 2004 10:34 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: excellent point Andrew!
Well, if we had part to part rulesets you could certainly do this.
You would just apply a rule based on how tall a component is.
2 short comps=close, 2 tall or a short and tall= far.
Let's see how they implement it in 15.5 and then we will be
able to see all of the ways they did it wrong.
Or not.
Kevin McCowan
Gene Carman wrote:
> again, simple rules for day to day needs.
>
> -----Original Message-----
> From: MAILER-DAEMON@xxxxxxxxxxxxx [mailto:MAILER-DAEMON@xxxxxxxxxxxxx]
> Sent: Tuesday, June 08, 2004 10:18 AM
> To: icu-pcb-forum@xxxxxxxxxxxxx
> Subject: [PCB_FORUM] Re: how do YOU handle component spacing rules?
>
>
> Hi Ed,
>
> Personally, I like the idea of DFA checks but my angle is in the third
> dimension. I'd like to be able to set up not only the types you've
> outlined, but rules for minimum spacing based on package height. Our CM
> needs more space between a 200mil high connector and an 0603 cap than
> two 0603 caps side by side.
>
> Any thoughts on creating rule sets based on height?
>
> Thanks,
>
> Andrew
>
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