Mr Mark Simmons:

        It will be a great help if you can foward the scaling chart to me.

Thank you


Robert
______________________________ Reply Separator _________________________________
Subject: Re: [TN] BURR
Author:  ,"TechNet Mail Forum." <[log in to unmask]>, at internet
Date:    16/1/98 11:28 PM


Padmanabha Anandapuram Halappa wrote:
>
>      Good day Folks,
>
>      We face dimension problem after depanellise the v-scoring board. The
>      board's thickness is 0.062" and the v-scoring remaining thickness is
>      0.015". After depanellise, the board dimension is found to increase by
>      0.01".
>
>      According to the fab. house, this is caused by the burr (protrusion)
>      after depanelling the board.
>
>      Is there any standard spec. for the burr after depanelling the
>      v-scoring board? What is the general dimension tolerance used in
>      design the board with v-scoring?
>
>      Thanks
>
>      Robert
>
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Robert, yes, the de-paneled part will be slighly oversized.  This is a
result of a slight unevenness at the point where the board is seperated.
This oversized condition will vary slightly depending on score depth.
This usually does not present a problem because, unlike a routed edge, it
is relatively soft and will yield to pressure when fitted into a frame or
case.  If this causes problems with your application, I have a scaling
chart that should help resolve the issue.
If you are interested you can contact me directly.

hope this helps,

Mark Simmons

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