Hi all,
Camtastic can compare layers using XOR drawing - works pretty well. Not
sure if all versions have this feature or only later ones - I thought it
wasn't specially new though.
(Also, there is a Show Physical Differences mode in DXP that is useful for
showing changes to PCBs between revisions. It could do with some
improvements but is useful as a check during minor revisions (helps to
confirm that no precious test points have been moved and stuff like that)).
Beyond Compare, and other text diff'ing tools, will be pretty useless on
anything that can be reordered (like gerbers).
Ian Wilson
On 04:52 AM 4/12/2005, TDK said:
Hi Brad;
When I was devising a methodology to compare gerbers on subsequent spins, so
I would NOT miss any detail, which has happened & required another spin,
several week delay & many perturbed managers & more $$$$, I thought of
comparing the data contents of the actual gerber file. Then I witnessed that
gerber files, if created from the exact same data, would NEVER be the same,
in data order that is. All is important is that the graphical end result is
the same, which it is. I don't want to propogate this theory if I am not 110
% sure & being accused of generating modern day PCB "wives tales".
Is this actually correct?
I have a nifty 3rd party file compare utility (Beyond Compare) which for $30
or so, is a great tool for comparing line by line & character by character,
BOM files.
What I end of doing now is using RSI VISION software which has a gerber
overlay / compare utility & shows the graphical DIFFS only. This works quite
well, but use a big monitor with very good resolution.
Regards
TDK
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