Michael,
your problem is probably a combination of the things that others
have already mentioned. The location misalignment is probably due to the
"plot center" function in the advanced gerber tab of the cam server. I
always use the absolute origin for both gerbers and drill generation. You
could use the relative origin if you choose but just use it for both drills
and gerber.
Besides that there are also the other factors effecting drill
generation. The first is your data format, 2.3, 2.4, 2.5. This sets the
number of digits (2) and the number of decimal places (3 - 5), if your
scaling is off by a factor of 10 or 100 then this is the culprit. The other
function is the leading or trailing zero suppression, it can give some wild
results in the drill output when you reader is not configured similarily.
In short, you must have the same origin point used for gerber and
drill generation, you must have the same formats selected between Protel and
the gerber viewer for correct drill alignment and scaling. That's the gist
of your problem. It really doesn't matter what formats you use as long as
the viewer is configured correctly to import the data that you formatted
when generating the gerbers or drills.
Sincerely,
Brad Velander.
Lead PCB Designer
Norsat International Inc.
#300 - 4401 Still Creek Drive,
Burnaby, B.C., Canada, V5C 6G9.
Tel (604) 292-9089 (direct line)
Fax (604) 292-9010
Website: www.norsat.com
-----Original Message-----
From: Watnoski, Michael [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 14, 2001 8:46 AM
To: 'Protel EDA Forum'
Subject: Re: [PEDA] Excellon Drill Files
Importance: High
Hi Wolfgang,
The problem is not merely an offset, but it is not the same size.
It also appears not to be exactly the same, though it seems to have a
similar pattern.
Michael
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