[PCB_FORUM] Re: User defined layers with mirrored symbols

Linda,

As long as the user defined subclasses are named as "[name]_top" and
"[name]_bottom" you can mirror from Top to Bottom.  I have in my set up
scripts the creation of two subclasses, "silk_top" and "silk_bottom".  I can
place my company logo, made up of shapes, on "silk_top", or mirror it to
"silk_bottom".  Work like a charm!

Good luck!
Gary E. MacIndoe
PCB Design Engineer
Advanced Micro Devices, Inc.
Longmont, Colorado


  -----Original Message-----
  From: Linda_Stroud@xxxxxxxx [mailto:Linda_Stroud@xxxxxxxx]
  Sent: Monday, January 31, 2005 11:40 AM
  To: icu-pcb-forum@xxxxxxxxxxxxx
  Subject: [PCB_FORUM] User defined layers with mirrored symbols


I found a post from August about user defined layers with mirrored symbols
and wondered if anyone came up with a solution.  Our library has quite a few
symbols with user defined layers and we just discovered that Allegro15.2
treats those layers differently then it did in Allegro14.  In 14 if there
was a _TOP and not a _BOTTOM you could not place a symbol until you made a
_BOTTOM.  However, in 15.2 if there is not a _BOTTOM you can mirror the
symbol and the _TOP layer just stays on _TOP.  I now have boards with layers
on the wrong side. A corresponding _BOTTOM is added to the subclass list
within the footprint but since there is nothing on that layer it is not
brought into the board.  If the symbol is mirrored when it is first placed
on the board then the corresponding subclass is created but if placed and
then mirrored that doesn't happen.  There is no warning or DRC that a
subclass is missing. Any ideas or suggestions will be appreciated!
Thanks!Linda Stroud

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