1.  The V Cut definition (angle, deep* *etc.)
2.  The pizza cutter depaneling machine maintenance and the sharpness of
the disc
3.  The PCB thickness
4.   Drilling holes at the V score corners of the small PCBs at the pallets.
is mostly important for reducing the mechanical stresses.
Reuven

On Tue, Mar 20, 2012 at 8:22 PM, Roger Mack <[log in to unmask]> wrote:

> 5mm is about right for a capacitor parallel to a score line on a  1.6mm
> (62 mil) board.  If you place parts perpendicular or have a thicker board
> , then a greater keepout is required.
>
> I recommend doing strain measurements on your designs and to qualify a
> depanelling process.
>
> If you have parts that are a problem, one method to reduce the strain
> without changing the design is to route a slot along the score line on the
> waste rail side of the score. Run the route at least 5mm past the part in
> both directions to maintain the clearance to the score.
>
>
>
> Roger Mack  P.Eng.
> Manufacturing Specialist
> Parker Hannifin Canada
> Electronic Controls Division
> 1305 Clarence Avenue
> Winnipeg, MB  R3T 1T4 Canada
> direct 204 453 3339 x373
> [log in to unmask]
> www.parker.com/ecd
>
>
>
>
>
>
>
> From:
> Blair Hogg <[log in to unmask]>
> To:
> <[log in to unmask]>
> Date:
> 03-20-2012 11:44 AM
> Subject:
> Re: [TN] Spacing of Capacitors and resistors from PWB edge
> Sent by:
> TechNet <[log in to unmask]>
>
>
>
> We try for about 0.200" or 5mm.
>
> Blair
>
> On Tue, 20 Mar 2012 19:55:54 +0800, prashant chopra
> <[log in to unmask]> wrote:
>
> >Hi,
> >�
> >What should be the minimum spacing�of the capacitors and resistors from
> the PWB edge if V-score routing is used and the depaneling is using the
> pizza cutter depaneling machine?
> >�
> >Is there any white paper available on this which recommends the minimum
> distance from the PWB edge?
> >�
> >Thanks to all for support.
> >�
> >Rgds
> >Prashant
> >
>
>
>
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-- 

Best Regards,

*Reuven Rokah*

Mobile: 972-52-60-120-18
Tele-fax: 97239360688
<http://www.rokah-technologies.com/>[log in to unmask]
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