Electronics Forum | Fri Feb 09 16:04:56 EST 2007 | tiucric
Firstly , we are installing an ipulse m4e smt machine later this year. If any are being used in your production process please let me know just how good or bad the machine operates, any advance of information regarding problems : placement , nozzles
Electronics Forum | Fri Apr 18 11:38:50 EDT 2008 | sueph
I have a small board with some chips and 2 connectors (1 large and 1 small) with gull wing leads. The large connector has some "disturbed" solder joints per my QA people. These joints are toward the ends of the connector, not toward the middle. Th
Electronics Forum | Fri Apr 18 15:38:22 EDT 2008 | ck_the_flip
Do you have a picture? SMTNet HAS the technology now to post pictures. "Disturbed" to the typical Q.E. usually means grainy or dull, or a wrinkly solder appearance. All of this has to do with the "grain structure" of the solder joint. Here's a p
Electronics Forum | Wed Sep 20 19:43:06 EDT 2000 | Dave F
Some RF components are made in copper in weird spiral and parallel strip-line shapes. I'd either: * Send the boards back to where ever you got them and tell that bird brain to use SM-782 pads and practices. ... OR * Get the bird brain that sent you
Electronics Forum | Mon Apr 21 10:59:39 EDT 2008 | davef
That you have 'grainy' solder only at the ends of the connector and not at all solder connections indicates that your quality types are on track and are pointing you in a direction worthy of investigation and developing a better understanding of the
Electronics Forum | Mon Apr 21 11:55:29 EDT 2008 | realchunks
"Disturbed" usually means some form of movement. I would think your leads are moving due to warp as the board exits the reflow zone. Not knowing your profile, I would suggest checking your profile. Make sure you have adequate "above liquidous" and
Electronics Forum | Tue Nov 20 13:15:53 EST 2012 | jdengler
In Texas Instruments AN-1364 they say "The TO-247 package is not recommended for surface mounting".
Electronics Forum | Thu Aug 27 13:30:04 EDT 2020 | emeto
If there is damage of the glass coating or exposure of the resistive element it is a defect.
Electronics Forum | Wed Jul 15 13:33:56 EDT 1998 | Don Welling
I am looking for information on the amount of stress a component sees during the depaneling process. I am currently specifying a new piece of depaneling equipment and I have not found any studies that quantitatively compare the amount of stress diff
Electronics Forum | Thu Aug 27 00:08:51 EDT 2020 | smith88
In IPC 9.2 it shows missing paint the pic is terrible, is the missing paint the defect or is it damaged down under a protective layer that is the internal element.
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