With the boards I've made at Advanced Circuit www.4pcb.com) I only send 
one drill file and somehow the boards get correctly made with plated and 
non-plated holes.  I've never really tried to figure out what the key 
is......

By the way, if you're not familiar with freedfm.com check it out.  Send 
your gerbers and they do a reality check.  They spot all the common 
problems and send a reply in a few minutes.  You know you're in trouble 
if a reply doesn't come after 20 minutes....there's probably something 
really wrong!  I have had them call me too to help when I had a serious 
problem....one of the layers was mirrored somehow.

Jon




PicDude wrote:
> On Friday 13 April 2007 12:20, Bob Blick wrote:
>   
>> ... with budget quickturn board houses, they
>> do not do a second drilling pass. So if you want
>> non-plated holes you take your chances and depending
>> ... What you do is create a
>> pad stack that has a zero size pad on both layers.
>> ...
>> ...  But you should sometime at
>> least try the zero-pad-size method and see if it works
>> at the places you frequent.
>>     
>
> Interesting -- I must try this.  I'm not worried about non-plated holes on 
> prototypes (those always come plated and that's fine), but I have one type of 
> hole I use regularly for a PEMS-type press-in stud.  It does not fit/work 
> properly if the hole is plated (as the "teeth" in the studs don't grip the 
> metal part as easily so they spin as they're being tightened), so I need to 
> specify that for production.
>
> Cheers,
> -Neil.
>   

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