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June 2007

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Subject:
From:
Hernefjord Ingemar <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Hernefjord Ingemar <[log in to unmask]>
Date:
Mon, 11 Jun 2007 08:34:42 +0200
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text/plain (186 lines)
Wise words, Bill, you must be a guru. Or a gnu, which is equal. I work partly in a group called 'Industrial Processing Supervision'. The operators expect, with all the right, that when they get into trouble and shout, we will have the knowhow and expertise to solve the problem. And not only that, they want to see us in the production regularly, asking, checking, investigating, supporting etc. Whitecollars that isolate themselves, spending most of the time on seminars, internal education, benchmarking (all this is also necessary, of course)and such things are not popular. Every hour the operator struggles with an issue, he burns dollars. Your comment is something that should be hammered into many engineer's head.

Inge

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bill Campbell
Sent: den 9 juni 2007 19:09
To: [log in to unmask]
Subject: Re: [TN] SV: [TN] SV: [TN] Insufficient Solder

Used to deal with this in a past life.  You don't want to alienate anyone on the line, but also can't have people crying wolf all the time.  Much of what you do is transparent to the line, you are dealing with issues on multiple levels, but they don't always see immediate results.  You have to get the line's buy-in, your professional opinion alone is not enough because they don't have all the facts to know if you know what you're doing.  So prove it.

I'd suggest having all pcbs with insuffficient solder (make sure they indicate where somehow) placed aside for review by the operators, engineering, QC, supervision, etc.  Call a meeting for everyone to inspect visually.  Later, you may have to back up with data from pull tests, measurements, six sigma, but if you can get a majority to agree with what you're saying, that should settle the matter, and your opinion will be worth much more.

Also, keep in mind that there might actually be areas of insufficient solder caused by other process problems- poor stencil cleaning, not watching paste levels, pcb support during printing, exposure time to air, humidity, flux, reflow profiles, etc.  It is easy to doubt an operator, especially if they are whiny, have an attitude, worship Rosie O', or need something to do, but also many times they are right.
 We can miss that because we are so busy with bigger issues sometimes.

Ask them to help you improve the issue by providing examples, and not just touching things up immediately.  If the issue is sporadic, or varies all over, see your printing process and operator.  If its a specific area over and over again, check your stencil.  Sometimes, its actually a bent lead issue, still soldered, but it looks "insufficient".  Rule out nothing and communicate everything.

You are the support person, that means that you are ultimately responsible for how things are handled and what the dynamic is between the line and support.  The better the dynamic, the better the product.
 Everyone wants to do the right thing, we just sometimes disagree over what it is.

Good luck!  BC

On 6/8/07, Ron Peeler <[log in to unmask]> wrote:
> I'll get some
>
> Ronald D. Peeler Jr., B.S. IE
> Process Engineer
> SWEMCO
> Moorestown, NJ 08057
> Tel: (856).222.9900 ext. 31
> Cel: (484).948.0779
> Fax: (856).222.0700
> [log in to unmask]
>
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Hfjord
> Sent: Friday, June 08, 2007 3:29 PM
> To: [log in to unmask]
> Subject: [TN] SV: [TN] SV: [TN] Insufficient Solder
>
>
> Pictures, please.
> Inge
>
> -----Ursprungligt meddelande-----
> Från: Ron Peeler [mailto:[log in to unmask]]
> Skickat: den 8 juni 2007 19:56
> Till: TechNet E-Mail Forum; Hfjord
> Ämne: RE: [TN] SV: [TN] Insufficient Solder
>
> Flux is an area we havent explored.  I guess it would have been but 
> the calls that are being made are more of asthetics then function.  
> Most of are insuffiient calls are b/c the joint doesn't look perfect 
> and I mean perfect.  It is a real pain in my butt.  I do not want to 
> discourage inspection but I do not want insufficient solder to be my 
> #1 defect.  I have other fires to fight.  It is a fine line between 
> happiness and insanity.
>
> Ronald D. Peeler Jr., B.S. IE
> Process Engineer
> SWEMCO
> Moorestown, NJ 08057
> Tel: (856).222.9900 ext. 31
> Cel: (484).948.0779
> Fax: (856).222.0700
> [log in to unmask]
>
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Hfjord
> Sent: Friday, June 08, 2007 1:14 PM
> To: [log in to unmask]
> Subject: [TN] SV: [TN] Insufficient Solder
>
>
> Flux! Key to many problems.
> Inge
>
> -----Ursprungligt meddelande-----
> Från: TechNet [mailto:[log in to unmask]] För Ron Peeler
> Skickat: den 8 juni 2007 16:57
> Till: [log in to unmask]
> Ämne: [TN] Insufficient Solder
>
> Here is an age old question.  Does anyone here have a sure fire way to 
> combat insufficient solder.  I have tried all teh tecniques from what 
> I know of.  These consist of changing stencil thicknesses, changing 
> pastes, re-training ops to IPC-610-D.  I am at a lost.  It seems that 
> each operator sees insufficient solder differently and it is almost an 
> excuse from them to keep busy and make added "touch up."  I am almost 
> ready to through the category out the door b/c it is so subjective adn 
> people are so fickle.
>
> Any ideas out there?
>
> Ronald D. Peeler Jr., B.S. IE
> Process Engineer
> SWEMCO
> Moorestown, NJ 08057
> Tel: (856).222.9900 ext. 31
> Cel: (484).948.0779
> Fax: (856).222.0700
> [log in to unmask]
>
>
>
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