Electronics Forum | Tue Jan 16 07:51:19 EST 2007 | realchunks
Your Quality Manager won't let you make changes, yet you get blammed for process problems? First, you need a change in management. Second, if you can't change set pre-heat temps, change the conveyor speed. Slow it down and see if your joints loo
Electronics Forum | Tue Jan 23 23:28:54 EST 2007 | jovial_guy23
If you have flux deposits on the cooling plates, try out Zestron's VIGON RC101...It is an extremely good product especially for reflow ovens and wave solder systems. Check it out...Minimal maintenance water based chemistry with no flash point...Much
Electronics Forum | Fri Feb 23 15:48:28 EST 2007 | Wave Master Larry , soltec college graduate and consultant
MIka i just got back from their on a consulting basis. yeah,i had hwang, Zarrow, a Phd chemist from Henkel and others asking my advice on all matters wave related.u can email me at wavemasterlarry@yahoo.com . perhaps we can meat in person over drinks
Electronics Forum | Tue Feb 27 12:45:08 EST 2007 | russ
Boy it is good to see the wave master back in action! I mean really guys, is Larry the only one here who knows that the lead turns into vapor in the oven and then in the cooling zones it falls back onto the board and creates the solder joints? P.
Electronics Forum | Mon Mar 12 08:59:46 EDT 2007 | davef
Questions are: * You say 'voids', but you describe poor barrel fill. Are you seeing both? * Sometimes designers need to reduce the heatsink effect of large ground and power places, but this usually shows on the two upper corner pins, not all corners
Electronics Forum | Tue Mar 27 06:37:14 EDT 2007 | realchunks
There is no "standard" or "procedure". Your customer is putting a requirement on you because this has probably lead to weak QFP solder joints breaking in the field or non-functioning units due to co-planar QFP legs. I�ve been there done that. Had
Electronics Forum | Thu Apr 05 08:04:40 EDT 2007 | davef
On finding baking recipes in the fine SMTnet Archive, your problem is not in the flex portion. It's in the rigid [FR4] portion. On baking advice from experts look here: http://www.circuitnet.com/experts/EQ10120.shtml Finally, on reworking your ou
Electronics Forum | Thu Apr 12 17:34:05 EDT 2007 | carsan
We are running RoHS compliant & non RoHS compliant assemblies. We buy our bare boards from one supplier that only manufactures RoHS compliant boards using a Sn100 finish. Is there any known issues running leaded solder on a Tin finish? Does normal
Electronics Forum | Fri Apr 20 03:41:50 EDT 2007 | aj
Hi All, We did not change our internal Solder pot components (stainless steel)when we switched to Leadfree Alpha SACX . Running approx: 1 year now and I carried out checks yesterday and we have some signs of erosion. Did not expect to see this so s
Electronics Forum | Fri Apr 20 04:50:20 EDT 2007 | bartlozie
Hello, we did same things, we switched some machines without changing or coating nozzles and pumps. we uses SACX from alpha. this now one year ago. do you have pictures of the erotion? I'm interested in these. Please send me if you can. I'll check
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