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April 2006

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Subject:
From:
Denis Lefebvre <[log in to unmask]>
Reply To:
(Designers Council Forum)
Date:
Tue, 25 Apr 2006 08:17:37 -0700
Content-Type:
text/plain
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I must admit, this is a drawing callout that I have never fully
understood. Back in the early days, per MIL-STD-275 I'd callout Diameter
True position at 0.010", then at some point in time it was reduced to
0.008". Now I have someone telling me it should be 0.003". Huh?
 
Can someone help me understand what this (Diameter True Position) means
and how dropping the value to 0.003" might be a good thing or a bad
thing?
 
Denis Lefebvre, CID+
Sr. PCB Designer
Finisar Corp <http://www.finisar.com/index.php> 
(408) 542-3832
 

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