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Subject:
From:
Phil Nutting <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Phil Nutting <[log in to unmask]>
Date:
Thu, 19 Apr 2012 11:46:43 -0400
Content-Type:
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Jack,

Some of this goes back to "once burned, twice shy".  We have had issues with bare boards purchased from the CM's board house.  Solution: we buy the boards from our preferred vendors.

Each CM has different equipment and therefore different requirements for panelization, stencils and then depanelization.  Now throw in we might use different CM's to build the same boards.  Refere to my previous statement.  Grrrrrrrrr!

Our documentation suggests that when purchasing the boards the targeted CM should have input on their needs/requirements.  Doesn't always work.  Sigh.

Is this issue unique to us or do other OEMs experience much the same issues?

Phil

From: Jack Olson [mailto:[log in to unmask]]
Sent: Thursday, April 19, 2012 11:23 AM
To: Phil Nutting
Cc: TechNet E-Mail Forum
Subject: Re: [TN] singulation or depanelization of circuit boards

Well, in that case, I should make one more point:

As a designer, one of my concerns is that, by letting the manufacturer panelize, they are going to focus on their own considerations and not so much on the material yield (the most boards you can get out of the same size panel). Especially in a "cost+plus" situation where the board is considered a component, and gets a corresponding percentage markup for the assembler who buys it, adding cost is actually a benefit for them (I'm not sure how common that is, but I have been there).
I've even experienced a company that insisted on making some pallets in multiples of ten because the orders were typically in multiples of ten, (and "they are easier to count").
I'm NOT kidding...

best wishes,
Jack

.
On Thu, Apr 19, 2012 at 10:08 AM, Phil Nutting <[log in to unmask]<mailto:[log in to unmask]>> wrote:
Jack,

Chuckling, both!  I'm saddled with the "system", but want to find a better way (Oh ya, the industry standard).

I "get it", but my thoughts (based upon my 40 years of experience and the info of all my knowledgeable friends on  Technet) are not always accepted by those making the rules.

What you and others have provide is going to be used to attempt to show them the light.

Wish me luck.

Phil

-----Original Message-----
From: TechNet [mailto:[log in to unmask]<mailto:[log in to unmask]>] On Behalf Of Jack Olson
Sent: Thursday, April 19, 2012 11:00 AM
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: Re: [TN] singulation or depanelization of circuit boards

It seems like your question contains two different preferences

1) "we insist on supplying the bare boards" (which means you force your supplier to live with whatever panel/pallette design decisions you've made)
2) "like to be able to send gerbers... receive perfect product" (which allows them some flexibility in adapting your design to their process parameters)

so, which is it?

If you chose the latter in the past, and your supplier's inexperience caused some "learning curve" waste or yield problems, you shouldn't have to pay or care about that, and they should be pro-active about fine-tuning it (especially since you have given them the freedom to palletize the way they want it).
Regardless, They should still be shipping you perfect product. That's MY opinion, anyway.

onward thru the fog,
Jack


.
On Tue, 17 Apr 2012 15:13:14 -0400, Phil Nutting <[log in to unmask]<mailto:[log in to unmask]>> wrote:

>Hi all,
>
>As we move forward we are finding that each Contract Manufacturer wants panelization and depanelization requirements that are unique to them.  Part of the problem is we insist on supplying the bare boards due to previous issues with past CMs.  Some CMs destroyed boards that were V-grooved, some can't make the mouse bites work.  I'm looking for guidance on solving this.
>
>I'd like to be able to send the gerbers to the CM, have them get the panels made, build them, singulate them and ship me "perfect" product.  Am I asking too much?
>
>Phil Nutting
>Design for Manufacturing Engineer
>Kaiser Systems, Inc.
>126 Sohier Road
>Beverly, MA 01915
>Phone: 978-922-9300 x1310<tel:978-922-9300%20x1310>
>Fax: 978-922-8374<tel:978-922-8374>
>e-mail: [log in to unmask]<mailto:[log in to unmask]><mailto:[log in to unmask]<mailto:[log in to unmask]>>
>www.kaisersystems.com<http://www.kaisersystems.com><http://www.kaisersystems.com>
>www.linkedin.com/in/philnutting<http://www.linkedin.com/in/philnutting><http://www.linkedin.com/in/philnutting>
>
>
>________________________________
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