[PCB_FORUM] Re: Metric to English - English to Metric
- From: george.h.patrick@xxxxxxxxxxxxxx
- To: icu-pcb-forum@xxxxxxxxxxxxx
- Date: Wed, 24 Aug 2005 12:13:56 -0700
Don:
Switching back and forth is a bad idea, there are ALWAYS going to be
problems and most of them are not with the software. There is ALWAYS going
to be round off errors when working with two dissimilar grids.
If we start a board, it starts in mils and stays that way, even if it is
shipped off-shore for off-hours work. If Japan or Germany start a board, it
is started in millimeters and stays that way even if it is shipped here for
"off-hours" work.
Keep it simple :)
--
George Patrick
Tektronix, Inc.
Central Engineering, PCB Design Group
P.O. Box 500, M/S 39-512
Beaverton, OR 97077-0001
Phone: 503-627-5272 Fax: 503-627-5587
http://www.tektronix.com <http://www.tektronix.com/>
http://www.pcb-designer.com <http://www.pcb-designer.com/>
It's my opinion, not Tektronix'
> -----Original Message-----
> From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx
> <mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx> ] On Behalf Of Don Folk
> Sent: Wednesday, August 24, 2005 11:45
> To: icu-pcb-forum@xxxxxxxxxxxxx
> Subject: [PCB_FORUM] Metric to English - English to Metric
>
>
>
> I have a customer that does business in Japan and the US. He would
> like to be able
> to go back and forth between English and Metric in Allegro 15.2 to
> supply Metric files
> to Japan and English files to the US. I always seem to have round
> off errors, which
> can create DRC's, disconnects and pad stack corruption. It seems
> like you can
> minimize the problems, but you can not go cleanly back and forth
> with out having to
> fix something. If you keep going back and forth between English and
> Metric will the
> board eventually be corrupt beyond repair. Is this going to be
> fixed in Allegro 15.5?
>
> Thanks in advance,
> [Don Folk] Don Folk
>
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