Dan,
 
   I use PCAD 8.5 (dos) and have been using metric parts in 
 english databases for years.  You will have to use "snap to pin" 
 when routing since the pins will be at sub-micron locations.  I 
 use english padstacks so the apertures are all english.  
   The only problem I have seen is when you have just enough room 
 between pads for a trace, it won't fit (DRC error) because the 
 pads are slightly of you routing grid (even if you go to 1:1) 
 and it throws the spacing to one side.  
   All in all, the use of metric parts has caused me little or no 
 pain.
   I hope this helps!
 
 Best Regards,
  Brandon Luther
  Dataram Corp.


______________________________ Reply Separator _________________________________
Subject: Mixed Metric and Inch Components
Author:  [log in to unmask] at Internet
Date:    8/7/96 4:18 PM


We have a design using component footprints constructed of both inch and 
metric dimensions and would like to know what problems this could cause 
during routing.
 
And is this mixture a "normal" occurrence with many designs today?
 
Thanks.
 
Dan Munger
Fermilab
Batavia, IL USA
[log in to unmask]
 
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