Hi, Steve,
The short answer, I believe, is Yes, but that's only because the
requirement behind the spec is that leads must not be capable of being bent
over to short against their neighbours. Clearance to the next assembly is
also a consideration. Connector pins are pretty stiff and aren't so easily
bent - if they bend far enough to short, the board's probaby wrecked in the
process with the hole/pad damage caused by the bending strain.
Also, how to cut them? Clipping them with cutters is quite a tough
operation, and the shock effects on the solder joints by the clipping
operation is considerable, and can be damaging.
Unless they're excessively long (long enough to contact a neighbouring
assembly or bend more easily to cause shorts, from an engineering pointof
view, I would opt to leave them at their original length. How compliant do
you have to be? Can you raise a waiver or production permit for this
portion of the build?
Peter Duncan
"Stephen R.
Gregory" To: [log in to unmask]
<SteveZeva@AO cc: (bcc: DUNCAN Peter/Asst Prin Engr/ST
L.COM> Aero/ST Group)
Sent by: Subject: [TN] Trimming Leads...
TechNet
<[log in to unmask]
ORG>
10/18/01
03:57 AM
Please
respond to
"TechNet
E-Mail
Forum."
Hi All,
I've got a question about trimming leads on components such as three-row
DIN connectors, machine pin sockets, PGA devices, things like that...
In the past, I've never trimmed the leads on components like that. But I
can't find any reference that says those are things that you don't lead
clip...
The reason I'm asking is the -610 and J-STD say that for class-3, the leads
are not supposed to be longer than 1.5mm (.0591"). Should leads be clipped
on the kind of components I outlined above if they exceed that?
Thanks!!
-Steve Gregory-
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