[PCB_FORUM] NC drill qurery
- From: nagaraj <nagaup1@xxxxxxxxx>
- To: icu-pcb-forum@xxxxxxxxxxxxx
- Date: Thu, 5 Feb 2009 20:12:50 -0800 (PST)
Hi,I have a query on drilling. If the board has same drill size with different
tolerance say, 20mil drill having tolerance as +/-2mil at some places20mil
drill having tolerance as +/-3mil at some places20mil drill having tolerance as
+2/-10mil at some places(vias)
How they get drilled to achieve different
tolerance using same 20mil drill bit?
Looking for a detailed explanation on drilling process in PCB.
Thanks,raj
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