Hello Noralee,
This requirement is meant to assess the overall "indentations" on a
surface in a 300mm x 300mm square area. The difficulty with analyzing
several indentations of different sizes is that you cannot just count
them (1, 2, 3) and make them equal as a larger indentation is a bigger
issue than a smaller one. So the "point value" chart assigns bigger
indentations a larger number than "1" as they can be a bigger issue. So
if a CCL surface (300mm x 300mm) has 3 (0.18mm indentations) "point
value of 1", 2 (0.36mm indentations) "point value of 2" and 1 (0.65mm
indentation) "point value of 4", then the "point value" score for
indentations is 11 (1+1+1+2+2+4). I now take that "point value" number
of 11 down to table 3-4 "Surface Quality Classification" and see that
with a point value of 11, my surface quality is "Class B".
Please let me know if I or Microtek Laboratories can be of any further
help.
Best Regards,
Bob Neves
Chairman/CTO
Microtek Laboratories
Anaheim, CA
+1 (714) 999-1616
Changzhou, China
+86 (519) 548-7805
[log in to unmask]
www.TheTestLab.com
________________________________
From: TGAsia [mailto:[log in to unmask]] On Behalf Of Li Yating
Sent: Friday, June 22, 2007 1:28 PM
To: [log in to unmask]
Subject: [TGA] IPC 4101 comprehension
Hi everybody,
I have one question about IPC 4101 as the following. Could you tell me
how to comprehend "Point Value"?
Thanks a lot!
Best Regards,
Noralee
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