Electronics Forum | Thu Apr 19 02:49:07 EDT 2007 | ray
I observed some black dot or some oxidation occured on chip termination on pcba reflowed fews weeks ago as buffer stock. The solder joint and fillet wetting is good and shinning. It is an acceptable or defect condition per IPC standard/requirement? W
Electronics Forum | Thu Apr 19 10:59:05 EDT 2007 | peteb
Greetings, Is there a Mil Spec or IPC spec on how many times you can wave solder a PCB? I did a search on this forum with no results. Common sense says two or three times. I need documentation.Thanks for any info.
Electronics Forum | Thu Apr 19 19:57:09 EDT 2007 | davef
heat and cycle* Here's one of the threads you'll find: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=48102
Electronics Forum | Fri Apr 20 07:40:28 EDT 2007 | realchunks
Hi PeteB Do you know PeteC? Anyway, it all depends on your most sensitive part. Look up the spec sheets to determine. Most general parts can take 3 or 4 heat cycles easily.
Electronics Forum | Thu Apr 19 16:22:33 EDT 2007 | Miguel Sangabriel
I am looking for an AOI equipment for a 20cm square boards with 600 components, pasives and QFPs. what is in the market for this type of applications. msangabriel@hotmail.com
Electronics Forum | Fri Apr 20 00:02:11 EDT 2007 | Haris
Hi all, Recommended grease for Yamaha YV 100Xg is NSK grease NSL but i have a problem to find its direct supplier. thanks.
Electronics Forum | Mon Apr 23 03:15:13 EDT 2007 | Esah
Yes, we also never experience erosion phenomenon on our solder pot. We are currently using one Sn Cu based alloy, which is SCS7.
Electronics Forum | Mon Apr 23 09:40:51 EDT 2007 | greg york
Strange that, I heard one guy had problems with Tin,Copper Nickel alloy were the Impellar dissolved in 9 weeks it was in a HASL machine. Best regards Greg
Electronics Forum | Fri Apr 27 10:52:08 EDT 2007 | E FORTUNA
SS EROTION WITH ANY SACK ALLOY IS INEVIDABLE GETTING A YEAR OF USE IS ONLY BECAUSE YOU ARE USING SACKX MOST OTHER SACK ALLOYS WOULD HAVE CAUSED MORE DAMAGE IN THE SAME PERIOD.ED
Electronics Forum | Mon Apr 23 11:55:42 EDT 2007 | davef
We agree with Grayman. You should clean your fixtures. If you apply [leave] low residue flux in amounts greater than the supplier recommendation, the remaining residue can cause damgerous corrosion. Certainly it is then no longer low residue.
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