What is needed next is a gap height, under components
also, so with that and the height value, small components
can be placed under high components. Then there's the 
problem of the gap not being the same for the whole 
component, hmm, full 3d model next... yike

Darren Moore


> -----Original Message-----
> From: Ian Wilson [mailto:[EMAIL PROTECTED] 
> 
> On 11:42 AM 2/03/2004, Trent Bates said:
> >I am relatively new to Protel so this is probably an easy 
> question for you
> >guys.
> >I am using Protel 99SE
> >
> >How do I place parts on top of one another?  For example I 
> want to place a
> >0805 resistor underneath a Radio module on the same side of 
> the board.
> >Physically there is space but in the Rules, the Component Distance
> >Constraint will not let me.  I know that "Multilayer Check" 
> will allow me to
> >place a surface mount part underneath a through hole part if 
> it is on the
> >other side of the board but I want it on the same side of 
> the board.  I know
> >the answer is obvious but I can't find it.
> 
> The simplest and probably most common solution to this, in 
> P99SE at least, 
> is to simply turn off the relevant component clearance rule.  
> At least for 
> on-line checking.  You may care to leave it enabled for batch 
> checking and 
> then simply mark it off as being a known and checked 
> violation in the DRC 
> report.
> 
> This is basically what I used to do with P99SE.
> 
> DXP offers some improvement but there is still no ability to 
> check for and 
> allow a negative clearance (overlap).  The method in DXP is 
> to remove these 
> two items from the general component clearance rule - the trick is to 
> attempt to do this without affecting the ability to check for 
> violations 
> between other components (or with other components and the 
> two you don't 
> want to check against each other).  But that is another topic.
> 
> Bye for now,
> Ian



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