As I mentioned, we only put a pad and hole at each end of the slot
purely as reference points for the Vendor. The slot is routed per
the Vendor's
process not step and repeat drilled.
Info put on the mech layer - is this used as a reference for the
fabrication drawing or
is the layer combined with other layers to create a fab. drawing.
I have not used the mech layers and not familiar with their use.
Richard Barsczewski
> -- ---Original Message-----
> From: Abd ul-Rahman Lomax [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, June 27, 2001 1:15 PM
> To: Protel EDA Forum
> Subject: Re: [PEDA] AW: Pad With Slotted Hole
>
> At 09:06 AM 6/27/01 -0400, Richard Barsczewski wrote:
> >We put a pad and hole (corresponding to the slot
> >width) at each end of the slot
> > and then add the dimensions for the slot on the fabrication
> drawing.
>
> Some of the slot information can be put on a mech layer as part of the
> footprint.
>
> Multiple overlapping drill hits would be murder on drills if they were
> small, but slots usually involve large enough drill sizes that the drills
> won't break, so the series-of-holes method may be practical, if a bit
> ugly;
> it avoids the need for any special slot processing. The multiple holes can
>
> have pads with the same pad designator.
>
> [However, it is always a good idea to talk to your fabricator before
> dumping something unusual on him!!!]
>
> As has been noted, Protel will assign these pads the same net reliably if
> the Synchronizer (the Update PCB command in Schematic) is being used. It
> also works with older netlist load but there is a bug that one should
> understand before trying it in that way (the next load will *remove* the
> net assignments of all multiple identical pads, and they will come back
> with the next load, etc.)
>
>
> [EMAIL PROTECTED]
> Abdulrahman Lomax
> P.O. Box 690
> El Verano, CA 95433
>
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