[PCB_FORUM] Re: Metric database
- From: Kevin McCowan <kmccowan@xxxxxxxxxxxxxx>
- To: icu-pcb-forum@xxxxxxxxxxxxx
- Date: Fri, 01 Apr 2005 17:29:21 -0500
Everything works.
Just set the units as you want to see them and
make sure that the accuracy is enough to match
whatever you choose for your gerber output.
I was going to do this several (maybe 10) years ago
when I worked for NASA but when I called the board
manufacturer they said "Sure, we can convert that."
I decided I didn't want them to "convert it" so I
never switched. It has never been a problem.
You should call your board house, though. It
never hurts to get their input.
Kevin McCowan
Sr. PCB Designer
TSI Telsys
Gary MacIndoe wrote:
Ok, now for something completely different...
Has anyone set up a design in metric, and sent it out to Fab? Some
questions:
- Did you set the "User Units" to Millimeter or Microns?
- What did you set the "Accuracy" to? (maybe 3 for Millimeter, 0 for
Microns?)
- How about the Artwork Parameters, "Output units" can only be set to
Inches or Millimeters?
- Anything else about working and creating output in a Metric database
I should know about?
I have started with the database set up in Microns in order to have
whole number trace widths (75 and 100). If I switch to a Millimeter
database, the trace widths become .075 and .100 (I guess I could handle
the less than whole numbers).
Anybody have any suggestions about this?
Thanks for any help!
Gary E. MacIndoe
PCB Design Engineer
*A*dvanced *M*icro *D*evices, Inc.
Longmont, Colorado
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