Yes, X-outs are common.  Whether an indicator of competence, it depends on the resolution/difficulty of manufacture.  Generally, if there are too many x-outs, the vendor will go out of business!

By the way, we use DuPont Axarel 2200 sprayed in an air brush followed by alcohol in an airbrush followed by air in an airbrush!  The alcohol alone just seems to move the flux around and won't attack the heavy deposits.

Wayne Thayer

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Wilson, Bob
Sent: Wednesday, December 17, 2008 1:58 PM
To: [log in to unmask]
Subject: Re: [TN] x-outs in panel

Thanks for all of the great replies on the board cleaning question....

Here's another:

Purchasing is asking: When a fabricator panels a board and there are x-outs within the panel, does that mean that the fabricator isn't competent?

We have received 90% of our boards separated into single units and we now have an assembler that wants the boards in a panel.  Some of the boards in the panel are x-ed out.

I'm saying that x-outs are common enough, that more than one board is usually not good enough to be used for production, but that is because of the tight tolerances and difficult manufacturing methods.

Is that a good argument?

Bob Wilson
E/M Designer, CID+
SpectraSensors, Inc.
11027 Arrow Route
Rancho Cucamonga, CA 91730
(909) 948-4110
www.spectrasensors.com
www.ipc.org


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