Bob,
Good input from you and others. You hit the nail on the head with the DFM
comment that sure caught my eye. You're abloslutely right about not letting
anyone do anything arbitrarily do something to YOUR designs and product. You
must specify what you want and there can be no misunderstanding about what
that is. The master draawing is the primary instrument ensuring this.
Ths fab shop has its needs as does the assembly capability. The customer
must ensure concurrence between all three is forthcoming. Otherwise, you
don't get what you specify and that if very bad. How and what you use to
create a clearly defined drawing is up to you, but the effort must effect an
instrument that allows no ambiguity or misunderstandings.
Enjoy,
MoonMan
----- Original Message -----
From: "Croslin, Robert" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, September 10, 2002 6:23 AM
Subject: Re: [TN] Panelisation Software
> I agree with Carrie. Even though we outsource all of our builds, we've
> always done our panel design in house. We start a layout with the panel
in
> mind and how it will affect the PCB fabricators yield by learning what
sizes
> the eventual fab house uses. The panels are then designed with the array
> being such as to best fit the wave or reflow equipment by taking our
> assembly house's guidelines into account. Then, any bottom side passives
> are placed in such a way as to maximize the wave, should one be used.
Even
> though our stuff is high mix, low volume, this takes a lot of guess work
out
> of the equation. We also let our assembly house review the placement
before
> we route. This done, we're able to design the board as Carrie suggests,
> with the overhangs and breakouts or scoring where we want them, not where
a
> fabricator might arbitrarily place them. Like the Moonman says, DFM.
>
> Bob Croslin
> Nielsen Media Research
>
> -----Original Message-----
> From: Morse, Carrie [mailto:[log in to unmask]]
> Sent: Monday, September 09, 2002 3:38 PM
> To: [log in to unmask]
> Subject: Re: [TN] Panelisation Software
>
> Not sure if there is or not, but, I've been most successful in just
drawing
> them in where I want them. Of course, that decision is based on a number
of
> variables such as depanelizing equipment, overhanging components, and ease
> of access to the tab. I have also found that a board fab house may not
take
> my drawing seriously and I have at times actually put a note on the panel
> drawing stating "locate tabs as shown".
>
> -Carrie
>
>
>
> -----Original Message-----
> From: d. terstegge [mailto:[log in to unmask]]
> Sent: Monday, September 09, 2002 11:46 AM
> To: [log in to unmask]
> Subject: [TN] Panelisation Software
>
>
> Hi Technet,
>
> For most of our products we ask our boardvendors to choose suitable
> positions for the break-away patterns. This is giving more problems then
> I want, and as an alternative I am considering to ask our production
> engineers to fully specify the design and positions of the break-away
> patterns.
> Currently we're using Kwickfit to specify our panelisations, but that
> doesn't have the possibility to specify how the break-off patterns look
> and where they should be positioned.
> Is there, besides dedicated PCB-design software and general
> CAD-software, any software on the market that can make such a detailed
> specification of a board-panelisation ?
>
> Best regards,
>
> Daan Terstegge
> Unclassified mail
> Personal Website: http://www.smtinfo.net
>
> --------------------------------------------------------------------------
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