Wolfgang,

If you want something to be a certain way and it is different than the
specifications you have contractually agreed to then put what you want in
the assembly drawing you provide the contract manufacturer. Also it would
behoove you to provide or agree to pay for any (NRE) tooling that would
insure soldering the connectors correctly the first time and/or mechanically
testing their alignment before being shipped to you. 

As for rework how big (a pain in the behind) is this connector or
connectors? How thick is your PCB? Is this connector tied in a big way to a
power or ground plane, I.E. are we going to be pulling the barrels out with
the connector pins? How is this connector installed normally? Have you
thought about pressfit? 

Dorothy Lush
Manufacturing Engineer

> ----------
> From:         Busko, Wolfgang[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;Busko, Wolfgang
> Sent:         Tuesday, August 14, 2001 8:48 AM
> To:   [log in to unmask]
> Subject:      Connector tilt, acceptable or not?
> 
> Thanks Steve for your picture service !!!
> 
> To all,
> 
> I have some pictures on Steve´s page
> http://stevezeva.homestead.com/index.html
> <http://stevezeva.homestead.com/index.html> 
> 
> The issue is that these connectors (Teradyne 2mm pitch) adapt our boards
> to
> a backplane and the problem is that due to this obvious shift/tilt the
> danger of damaging some of the male connector pins at the backplane if not
> mounting these boards with the greatest possible caution is quite
> probable.
> 
> The CM in this case states that according to IPC A610 chapter 5.2.9 this
> is
> within tolerance of 0.5mm as shown and refuses any rework or refund.
> 
> The question is, does 5.2.9 apply in this case? The "not acceptable"
> criteria is what the discussion is all about. With, let´s say, caution and
> some extra force the insertion is possible but I see the danger of
> breaking
> backplane connector pins especially when customer service teams try to
> change boards  --( it happens from time to time and asks for a new
> backplane
> or, if in the field, the change of the complete 19" rack)
> 
> To do the mounting of the connector properly is absolutely no problem and
> has never been one until now that they changed their workflow and team for
> this task.
> 
> The rework would be: Loosen the srew - attach mating connector module -
> resolder over rework wave and the connector adjust automatically
> 
> We ourselves do have the "accept or not accept"-debate "now and here" and
> I
> would like to hear what others have to say about the risks of rework
> compared to the risk of damaging a more costly device.
> 
> Me no like this borderline cases, 
> 
> Wolfgang
> 
>  
> 
>  
> 
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