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PostPosted: Fri Feb 14, 2020 10:14 pm 
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Location: Ontario, Canada
GARTHWILSON wrote:
I do not use SMT for connectors, since the stresses of inserting, pulling out, or yanking plugs or daughter boards can definitely tear the foils loose.
Yup. Here's a communications card which I gave an emergency repair in September. It's ironic that these almost microscopic traces carry commands to a motor controller whose output uses conductors the thickness of a broomstick (1500 Amps at 600 Volts).

Thanks to the fragility of this SMD connector, a minor accident resulted in a local factory losing half its production capacity. (And they were facing a three day delay to take delivery of a new com board.)

-- Jeff

Attachment:
GEDC4590TchLores.JPG
GEDC4590TchLores.JPG [ 193.51 KiB | Viewed 523 times ]

Attachment:
GEDC4640TchLores.JPG
GEDC4640TchLores.JPG [ 215.98 KiB | Viewed 523 times ]

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PostPosted: Fri Feb 14, 2020 11:23 pm 
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Dr Jefyll wrote:
GARTHWILSON wrote:
I do not use SMT for connectors, since the stresses of inserting, pulling out, or yanking plugs or daughter boards can definitely tear the foils loose.
Yup. Here's a communications card which I gave an emergency repair in September. It's ironic that these almost microscopic traces carry commands to a motor controller whose output uses conductors the thickness of a broomstick (1500 Amps at 600 Volts).

Thanks to the fragility of this SMD connector, a minor accident resulted in a local factory losing half its production capacity. (And they were facing a three day delay to take delivery of a new com board.)

-- Jeff

Attachment:
GEDC4590TchLores.JPG

Attachment:
GEDC4640TchLores.JPG

I can see how that would happen. There doesn't appear to be any mechanical attachment for the connector. It's all dependent on solder.

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