Kane:
        Every company has developed processes unique or different from the
norm. I would say if there is a record that proves that burning does not and
has not caused any defects and that the customers concerns are just
concerns, then proof should be shown to the customer that the practice of
burning the lacing cord has a proven good record.  Concerns about the use of
cutters in tight places can also be pointed out.
        Regards,
        Ramon

> -----Original Message-----
> From: Kane, Joseph E [SMTP:[log in to unmask]]
> Sent: Monday, March 15, 2004 8:28 AM
> To:   [log in to unmask]
> Subject:      [TN] Burning Or Cutting Lacing Cord
>
> Need an opinion about the practice of cutting lacing cord (waxed
> and unwaxed) used to support or secure wire bundles.
>
> At a customer's request, we're thinking about outlawing the
> use of hot-tweezers (wire strippers), or more commonly soldering irons
> to cut the ends, and require use of scissors or cutters only.
>
> Operators have been using the side or end of the soldering iron
> tip for years.  The iron may fit more easily into tight areas, and
> it can save time to "burn" down a row instead of cutting individual
> tie ends.
>
> Perceived drawbacks to the practice:
>
> 1. Residue fouls the iron tip.  Some operators use an iron with
> an old, oxidized tip just for this purpose, but some don't keep
> a spare iron, and have to clean off the residue.  Customer is concerned
> about contamination of the solder joint.
>
> 2. Solder balls from the tip can stick to the lacing cord, maybe
> drop off and become conductive FOD.
>
> 3. Soldering iron can nick wires or other structures, damage
> insulation.
>
> I think that #1 is bogus - I don't think the solder joint can be
> contaminated by nylon residue, and if the tip won't tin, the operator
> can't make a decent solder connection.  Of course, fouled tips could be
> costing us money (we use Metcals).
>
> Issues 2 and 3 may have more traction, but these conditions are
> rejectable now.  We have no data to suggest that this is costing
> us in rework, or escaping into the field.
>
> Any strong feelings either way?
>
> -Joe
>
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