I used via/hole size of 1mm/0.7mm. Could be smaller if they had sharp tool for 
V-grooving.

Igor

-----Original Message-----
From: Danny Bishop [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, 26 June 2002 2:44 PM
To: 'Protel EDA Forum'
Subject: Re: [PEDA] PCB breakoffs


not a bad idea if you use big vias

> -----Original Message-----
> From: Igor Gmitrovic [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, 26 June 2002 11:44 AM
> To: Protel EDA Forum
> Subject: Re: [PEDA] PCB breakoffs
> 
> 
> Ivan,
> 
> you could V-groove the board and put vias on the tracks where 
> they cross the V-groove line.
> 
> Igor
> 
> -----Original Message-----
> From: Jim McGrath [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, 25 June 2002 11:14 PM
> To: Protel EDA Forum
> Subject: Re: [PEDA] PCB breakoffs
> 
> 
> Ivan,
> 
> Yes you can use FR4. I would score the board and use ribbon cable
> to interconnect from board A to board B.
> 
> Jim
> 
> Bagotronix Tech Support wrote:
> 
> > Hello, all:
> >
> > We have had our domain transferred to a new ISP last week, 
> so e-mail has
> > just begun working normally (I hope!).
> >
> > Anyway, I want to make a PCB that has a "break-off" area with extra
> > circuitry on it.  The idea is that some users may not need the extra
> > circuitry, so they can break off that area of the board to 
> reduce the size.
> > I know this is easy for cheap PCB material (phenolic, etc.) 
> but does this
> > work with FR-4 and such?
> >
> > If this is feasible with FR-4, what technique should I use 
> to make the
> > break-off?  I assume I will have to lay out a bunch of 
> unplated holes spaced
> > in a line, with traces going inbetween holes.  And I assume 
> that the way to
> > indicate this to the fab is to put comments on the drill layer.
> >
> > Thanks in advance for your help.  If no one replies, I will 
> assume our
> > e-mail still isn't working right.
> >
> > Best regards,
> > Ivan Baggett
> > Bagotronix Inc.
> > website:  www.bagotronix.com
> 
> 
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