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Reply To: | TechNet Mail Forum. |
Date: | Mon, 19 Jan 1998 15:46:24 EST |
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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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