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5 Don’ts and Do’s for Working with a Contract Manufacturer

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ghenning
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Re: clarification
ghenning   4/14/2015 11:45:21 AM
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Hi Pablo,

On designs that we see, these areas often add considerable manual labour content. 

Interconnects (connectors etc), both between PCBs in an assembly and for connection to outside devices, are very commonly specified as PTH rather than SMT because of concerns over the mechanical strength of the connector-to-pcb attachment. Defaulting to this rather than evaluating SMT alternatives can add requirements for manual labour or additional processes. In addition, assembly of mechanical fasteners to attached the connectors to the PCB or to add jacksockets etc can add labour; this is particularly true if there are lots of parts in the mechanical assembly (nuts, washers, lockwaers, etc).

Mechanical package (or chassis) design is also an areas where labour can add up. There particlular cases we see regularly: parts don't fit together easily, there are lots of mechanical hardware items, fasteners are readily assembled (slotted screws rather than socket head or rivets), alignment is sensitive and must be ensured with adhesives, there are many labels to generate and apply.

I hope this is a help.

George

 

 

 

Paul Bryson
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clarification
Paul Bryson   4/3/2015 4:28:35 PM
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To the Author: 

Could you elaborate on the following assertion?

"Two areas where automation is often overlooked are interconnects and mechanical (package) design."

 

docdivakar
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Re: 5 Don’ts and Do’s
docdivakar   4/1/2015 5:54:01 PM
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All good suggestions. In the era of wearables and IoT tags, these suggestions couldn't be more relevant than ever before. I consulted with a wearables startup few months ago and when I mentioned DFM and FMEA review, there were puzzled looks and push backs! These were deemed unnecessary!

MP Divakar

MWagner_MA
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Know what you want...don't assume
MWagner_MA   4/1/2015 7:47:16 AM
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The other mistakes I see recently is people assuming a CM will "do the right thing".  That may mean different things for different customers.  So for a CM that serves a wide variety of clients, there is no ONE right way or right thing.... like much of engineering, "it depends".  There is no substitute for doing your homework and understand a part of what your CM does and how it impacts your product.

zeeglen
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Good Advice
zeeglen   3/31/2015 10:40:42 AM
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And not just for contract manufacturing - this goes for all design engineers > production.

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