[sdiy] 0.100 pin header reliability.

[cheater cheater]

So you never got to the stage where the cable is so oxidized that any
attempt at doing anything with the cable just crumbles it to little
pieces?

D.

On Mon, Nov 15, 2010 at 18:48, Harry Bissell <harrybissell at wowway.com> wrote:
> The $300 crimpers allow Monkeys to make the cable assemblies   ;^)
> (see Design News magazine "Monkeys made my ----- feature)
>
> The $300 crimpers allow you to do a lot more connections a lot easier...
> but for DIY work the low-cost ones can be effective. For my modular
> (repackage) I chose Molex Centi-grid connectors because of the availability
> of a low cost hand tool ($40), and an automated one for that series is only
> about $150
>
> H^) harry
>
>
> ----- Original Message -----
> From: David G. Dixon <dixon at interchange.ubc.ca>
> To: 'Neil Johnson' <neil.johnson97 at ntlworld.com>, synth-diy at dropmix.xs4all.nl
> Sent: Mon, 15 Nov 2010 12:39:29 -0500 (EST)
> Subject: Re: [sdiy] 0.100 pin header reliability.
>
>> Ah, ok, the cheap $10 ones :)
>>
>> Crimping is only guaranteed to work as stated by the manufacturer when
>> (a) you use the correct crimping tool, and (b) that tool is within
>> calibration (i.e., it needs regular checking and recalibration if
>> required).  If you spend $300 or more on a crimp tool then you're in
>> the right ballpark.
>
> My crimping pliers have two crimping locations: A and B.  One is a bit
> smaller, and that's the one I use.  The two sides of the pliers come
> together very tightly -- these pliers are probably at least 30 years old and
> very well made.  I haven't seen any this nice in the stores, but I'm sure
> they'd go for between $50 and $100.
>
> The crimp pins I use have two sets of crimpable "wings" -- smaller ones in
> the middle for crimping onto bare wire, and larger ones on the end for
> crimping onto the insulation.
>
> I strip about 1/8" of insulation off the end of the wire, put it in the pin
> and crimp the small wings hard with the crimping pliers.  (I take pains to
> ensure that all the little wire strands get crimped in, although very
> occasionally a stray strand gets away.)  Then I crimp the large wings over
> the insulation.  The pin is on that wire so damned hard that you could never
> pull it off.
>
> Once the PCB is attached to the panel and all the connectors are plugged in,
> there is no pulling stress on the wires, and very little if any movement is
> possible since I bundle them together with plastic ties.
>
> So, what is going to fail here?  What does the $300 dollar machine do that
> my crimping pliers don't?
>
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> --
> Harry Bissell & Nora Abdullah 4eva
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