gEDA-user: finished hole size vs drill size

[gene glick <carzrgr8@xxxxxxxxxxxxx>]

when asked, PCBfabexpress says they expect the holes in a pcb to be 
spec'd as finished size.  So I am a little confused.  The gerber drill 
file contains the drill sizes, right?  So I went out of my way to be 
certain that the through holes matched up with real drill sizes (got 
those drill sizes from the pcb manual).  Not too long ago, I posted a 
question regarding finished hole size after plating - which led me to 
choose a drill size a little bit larger to allow for the after plating 
hole size.  Seems like I was wrong - at least according to 
pcbfabexpress.  So does that mean the drill chart gets interpreted as 
finished hole size?  This makes life easier, if you ask me - once you 
get past the confusion.  If most pcb fab houses use this convention, 
maybe the wiki/faq/manual is worth updating with this tidbit.

gene



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