That does exactly what I was looking for.
Thank you very much.

-----Original Message-----
From: Ian Capps [mailto:[EMAIL PROTECTED] 
Sent: September 1, 2004 7:27 AM
To: Protel EDA Forum
Subject: Re: [PEDA] Net with large clearance and polygon


I just checked with 99SE. It can be done.
Add a clearance rule as follows
A = Object Kind: Polygon
B = Net : ETH
Clearance = 12 mil
Same Net only.

It works for me any how.

Ian Capps

----- Original Message ----- 
From: "Cam Andruik" <[EMAIL PROTECTED]>
To: "'Protel EDA Forum'" <[EMAIL PROTECTED]>
Sent: Wednesday, September 01, 2004 6:16 AM
Subject: Re: [PEDA] Net with large clearance and polygon

> Thanks, JaMi for your detailed reply.
> When I wrote "rule for polygon clearance of 12mil", I was referring to 
> a "Clearance Constraint" for Object Kind = Polygon. I cannot get 
> Protel99SE to do what I want so I will draw what I want with Fills, 
> Circles, and Tracks.
> Thanks for the suggestions.
> Cam
> -----Original Message-----
> From: JaMi Smith [mailto:[EMAIL PROTECTED]
> Sent: August 31, 2004 12:02 PM
> To: Protel EDA Forum
> Cc: JaMi Smith
> Subject: Re: [PEDA] Net with large clearance and polygon
> Cam,
> Firstly, what "rule for polygon clearance of 12mil" are you talking 
> about? There is a rule under "Manufacturing" for "Polygon Connect 
> Style" and also one for "Power Plane Connect Style" and also "Power 
> Plane Clearance", but not one for "Polygon Clearance".
> You may be speaking of some specific "Clearance Constraint" that you 
> have set up that you have named "polygon clearance", but you will have 
> to
> that one to me.
> I believe that the simple answer to your question would be to set the 
> "Polygon Connect Style" rule under "Manufacturing" to "Relief 
> Connect",
> then than set up an additional "Clearance Constraint" rule which 
> applies
> "Scopes" of "Board", "Board", and the "Connectivity" of "Same Nets", 
> with the clearance of 12 mils, and enable this Clearance Rule at the 
> same time that you "Pour" your Polygon Planes with a "Clearance 
> Constraint" rule enabled which applies to "Scopes" of "Board", 
> "Board", and the "Connectivity" of "Different Nets" with the clearance 
> set to 97 mils (i.e. enable both rules, but only these two rules, at 
> the time of the "Pour" of the Polygon Plane).
> If that fails, read on.
> I am not quite sure that what you want can be done in P99SE with a
> "rule" that would be set up by "class" etc., that wouldn't apply to 
> the whole net EARTH as a whole, or otherwise be complex enough to 
> screw up.
> I encounter the problem all of the time, where I want my Polygon 
> Planes to have a larger clearance or setback than my normal 
> clearances, which sounds something like what you are trying to 
> describe below.
> The trick is to remember that a Polygon Plane clearance is really 
> pretty "dumb", in that it is actually defined by the "clearance rule" 
> ("Clearance
> Constraint") in effect at the time of the actual Polygon "Pour" (i.e.:
> time you generate a Polygon or "Re-Pour" ("Rebuild") it).
> I generally make a "Design Rule" for "Clearance Constraint" which I 
> name "Clearance PP (for Polygon Plane)", with the "Scopes" of "Board", 
> "Board", and the "Connectivity" of "Different Nets", and the specific 
> clearance
> I want, which in your case would be 12 mils, but in my case it would 
> be larger than the normal clearance for everything else.
> Normally, this "rule" would be "off" (no "check" in the "Enabled" box) 
> for normal routing and board work, but then when I am ready to make my 
> Polygon Planes, I disable (turn off) all of the other "Clearance 
> Constraint"
> and enable (turn
> on) only my "Clearance - PP (Polygon Plane)" rule, and than make or 
> "Pour" my Polygon Planes.
> Again, please remember that every time that you "Pour" or "Re-Pour" 
> (Build or
> Rebuild) a Polygon Plane, that it "Pours" at the "Clearance 
> Constraint" in effect at that time, and that this means that if you 
> have a Polygon Plane already set up, and you double-click on the 
> Polygon Plane to open it's Dialogue Box for any reason, that if you 
> click "Yes" to the question "Rebuild 1 Polygons?", that you are liable 
> to change the clearance of your Polygon Plane. If you really do have 
> to "Re-Pour" the Polygon Plane, you will have to go into your "Design 
> Rules" and enable and disable the appropriate rules, and then change 
> them back again when you are done with all of your "Pours".
> Needless to say, if you want to have different clearances for 
> different Polygon Planes, such as for example for Polygon Planes on 
> different
> then the "trick" to accomplishing this is simply to "Pour" (or 
> "Re-Pour") them with different "Clearance Constraints" in effect at 
> the time of each "Pour" (or "Re-Pour").
> Sometimes you may even need different "segments" of a single Polygon 
> Plane in different areas to have different clearances, such as for 
> example an
> around certain "controlled impedance transmission lines" which may 
> need larger clearances. This can be easily done by actually making up 
> your Polygon Plane with not a single Polygon Plane, but using several 
> different but overlapping Polygon Planes of the same net name, and 
> "Re-Pouring" the different segments with different "Clearance 
> Constraints" in effect for
> "Pour". You may end up with a few little "uglies" here and there, 
> where
> planes overlap, but that's what an occasional little floating piece of 
> "track" of the same net name (overlaid on the plane at that spot) is 
> designed to be used for, to clean it up, aesthetically speaking.
> Yeah, I know it's a pain, but that's Protel. What else would you 
> expect?
> While someone else may come up with some other way to accomplish what 
> you want to do, for me this is a simple and effective way to 
> accomplish the
> that works reliably for me from board to board (design to design), 
> without any repercussions or side effects, excepting the "Re-Pour" 
> issue.
> Unfortunately, in this case, like so many other things in Protel, you
> have to manually override the system to get it to do what you want it 
> to
> and every time that you have to do something like this, you have to 
> take
> chance that it will not be seen or understood by someone else down the
> which means that someone else could easily screw up the design, in 
> this
> simply by "Rebuilding 1 polygons" [sic] (I don't think that Protel can 
> actually "Rebuild" more than "1" "polygons" at a time, can it?). To
> such a problem from happening in the future, you might place a "Note" 
> just outside of the board perimeter, on some unused mechanical layer, 
> or
> the same layer you use for the board outline (or even on the Top 
> Overlay, but again, just outside the board outline), something to the 
> effect of: "DESIGN NOTE: Polygon Planes poured with 97 mil clearance 
> using "Clearance-PP Constraint".
> Yeah, I know, some idiot will still mess it up somewhere down the line 
> in
> future revision, but what do you expect with this software.
> Don't forget that you may have to "juggle" the "Clearance Constraint"
> Rules a little bit when it comes time to do your DRC, or you might 
> want to actually run a few separate DRCs with different Rules in 
> effect (possibly using a "copy" of the database where you would delete 
> the Polygon Planes with the smaller clearance so that you could check 
> everything else). Here again Protel's preprogrammed "intelligence" (or 
> specifically the lack
> thereof) really shines thru, but then again, I don't think that I have
> done a design in Protel where the DRC didn't screw up somewhere and
> about something that wasn't really an error (don't get me started on 
> this one . . . ). Please remember that the board is built to your 
> "Gerbers" and not to your DRC, and that sometimes the DRC may claim 
> that something is wrong where the board is actually right.
> I hope this helps to answer some the issues you raise with your 
> question.
> JaMi
> ----- Original Message -----
> From: "Cam Andruik" <[EMAIL PROTECTED]>
> Sent: Thursday, August 26, 2004 1:55 PM
> Subject: [PEDA] Net with large clearance and polygon
> > Help please.
> > I want to set the net EARTH to have a clearance of 97mil.  This is 
> > no problem, but when I place a EARTH net Polygon Pour it stays away 
> > from everything, including the EARTH Through Hole Pads by 97mils. 
> > Cannot figure out how to edit the rules so the Polygon will stay 
> > away from all nets by 97mils except EARTH net which should default 
> > to the rule for polygon clearance of 12mil. Any suggestions greatly 
> > appreciated.
> >

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