>>>>> "Stefan" == Stefan Salewski <[EMAIL PROTECTED]> writes:
> I have 0.5 mm grid size, 0.25 mm line width and 0.25 mm "Minimum > copper spacing" in Preferences/Design Rule Checking. > It was clear for me that this can cause problems -- indeed it does. > Sometimes it is not possible to draw copper lines on adjoining grid > points if Settings/Auto Enforce DRC cleararance in enabled. I recently stumbled into a related problem. Running the DRC after the board was almost finished, it reported lots of errors for those corner cases. (0.15mm lines with 0.15mm minimum spacing). I fixed it by manually reducing the DRC limits by one "epsilon" (i.e. 1/100 mil) in my .pcb file, changing 'DRC[591...' to 'DRC[590...]' Looking at the integer units internally used by PCB, it is obvious that 591 is slightly more than 0.15mm, while 590 is slightly less. So maybe that's the reason that exact 0.15mm spacing is just not achievable. Of course, if PCB somehow hid thes rounding issues from the user, some people (like me) would be much happier. David -- GnuPG public key: http://user.cs.tu-berlin.de/~dvdkhlng/dk.gpg Fingerprint: B17A DC95 D293 657B 4205 D016 7DEF 5323 C174 7D40 _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
