Electronics Forum | Thu Aug 17 13:26:53 EDT 2000 | John
Thanks for the responses. Actually we already use a reel change log with two verifications, a first off checklist with two verificaitons, and a first off inspection with two verifications. Unfortunately, the part numbers were pretty close, and the
Electronics Forum | Fri Aug 04 15:45:27 EDT 2000 | John Thorup
Ditto to everything said. If everything in the process is correct you will have good success at 25 mil but it will take much care. I have done 20 mil on this type of printer but, as Steve says, I wouldn't want to on a daily basis. Those wipe-offs a
Electronics Forum | Tue Aug 01 00:34:45 EDT 2000 | Antonio
I have evaluated SRT, Air-Vac and Conceptronic rework stations. All three machines offer great BGA and Micro BGA rework capability. But the one I have preferred is the Conceptronic Freedom 2000, as a matter of fact I have purchased two freedom 2000 i
Electronics Forum | Fri Jul 28 14:34:13 EDT 2000 | Gary Simbulan
Belive it or not, these boards were run through a Centech batch mode Vapor Phase machine. Single stage top side IR preheat. Vapor temp 218 C. Solder paste is an SN62 RMA.The boards were FR4 8 layer w/ solder mask, fairly conventional as might be e
Electronics Forum | Tue Jul 25 20:36:58 EDT 2000 | Dave F
Sal: When western companies first started studying Japanese companies, they found the Japanese using a technique called "poka-yoke." It means mistake-proofing. In this, the designer specifies parts and assemblies so that they can be assembled one
Electronics Forum | Thu Jul 20 11:51:14 EDT 2000 | Deon Nungaray
Walter, First of all, if I recall correctly you should not need a 6" leader for starting a reel on a Mydata. Mydata's have a reel leader extension attachment with a V hook at the end so you can avoid this need for a long leader. You should be able t
Electronics Forum | Tue Jul 18 03:49:43 EDT 2000 | Chris May
50% of cost, bin it. If viable, spend no more than that time to fix. Then concess or use as is. 3) Components are more tricky. Can they be returned to supplier if deemed to be faulty? (proof?). Is/was there an in-house handling problem ? Have design
Electronics Forum | Fri Jul 14 11:34:37 EDT 2000 | Mike F
John, The first thing to check is how tight the boards are being held in the conveyor (assuming you are using a finger conveyor). They should be a little loose at the input end so there is some room to expand. If the boards are held too tightly, when
Electronics Forum | Fri Jul 14 11:57:27 EDT 2000 | Michael Parker
To the Noble Lumpkin of the Grand Mystic Royal Order of the Nobles of the Ali Baba Temple of the the Shrine: Bubba, this here's Coy Just how did you get all those 25 cent thoughts out of your gray matter and down into your finger tips? The last tim
Electronics Forum | Tue Aug 01 09:42:07 EDT 2000 | Gary
The Technical Services Group at Alpha Metals has spent a fair amount of time looking at wave soldered Pb-free connections. We too have observed fillet tearing, fillet lifting, and pad lifting. I have concluded that without major changes in the mate
