[PCB_FORUM] Re: artwork and drill/netlist alignement
- From: "Reade, Sue" <Sue.Reade@xxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Fri, 25 May 2007 11:44:51 -0500
Here's our methodology.
Import artwork files
Correct undefined apertures
Correct layer types
Set Origin
To select the origin,
zoom into the area that is the 0,0 of your board, increase the size of
the cursor boundry box by selecting 'page up' on your keyboard, EDIT,
CHANGE, ORIGIN, SPACE ORIGIN,then select "oject snap" icon, then detect
on the object that marks your 0,0 (hopefully a pin or via).
Now you can read in your drills and they will be positioned correctly.
Correct the drill table to match up to exact drill sizes
Read in Netlist.
It seems like a lot but once you do it a couple of times, it's pretty
fast.
-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of William
Billereau
Sent: Friday, May 25, 2007 12:35 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] artwork and drill/netlist alignement
Hello all.
Does anybody know why artworks have an offset from drills and even the
netlist when we load them in cam350?
I have already seen it with the excellon files and then I used to align
drills to the gerber.
But now we are loading an IPC 356A netlist to compare with gerber, and
we can see that gerbers also have an offset from it.
So the error report is consequent...but false of course...
How to make gerber with the same origin than drills and IPC nets?
Wishing we won't have something to calculate job by job...
Thanks in advance and have a nice end of week.
William Billereau
CERN-TS/DEM
PCB Designer
PS. I wrote a little SKILL routine that reports ANTIPAD and REGULAR NULL
definition for vias/pads used in the board.
They are reported as database DRC (eXternally Determined Violation).
If someone is interested...
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