Electronics Forum | Fri Aug 13 10:19:35 EDT 1999 | Boca
| | We are using a mixed technology process with mostly through-hole parts plus some SMT IC's on the component side and some passive SMT parts on the solder side. We do not have a proper wave soldering machine for doing solder side SMT (double wave
Electronics Forum | Thu Jan 11 22:01:09 EST 2007 | davef
Joe: I know this is not the correct forum to post chip "reworking" questions. Reply: Rework questions are as appropriate as the next topic here on SMTnet J: BGA will not reflow at any normal temperature level. I believe these chips may have been gen
Electronics Forum | Thu Feb 24 00:06:00 EST 2000 | Ver Viray
Hi, Can anyone help me on how to choose profile points in wave soldering...e.g. smallest like R, C, to biggest like transformer heatsink etc.... Are the thermo-couples supposed to be on top of the pcb or at the bottom touching the solder bath when fl
Electronics Forum | Fri Feb 18 21:34:36 EST 2000 | gwen
We always have big power modules on the board,they are very heavy,so we use the screw to fix the soldered module,then we destroyed the solder joints.If we screw them first, the board can't be wave soldered. My questions: whether we should use the s
Electronics Forum | Fri Feb 11 05:43:21 EST 2000 | Wolfgang Busko
Hi Russ, I thought about it and what approach I would do. All that talk about causes and reasons doesn�t solve the problem. To determine wether it�s the PCB, the component or the process I would take a bare board, a component ( and maybe a different
Electronics Forum | Wed Feb 09 21:53:09 EST 2000 | Dave F
Jeff: Two things come to mind (if that's not stretching things too much ...): 1 You've got something unsolderable and not removeable with fluxes is on your component leads (or you don't have enough stomp in your flux). Do the leads that don't sold
Electronics Forum | Wed Nov 08 15:59:19 EST 2000 | jackofalltrades
We are currently evaluating a "selective soldering machine" from Ersa. We have been using it for about a month or so now and have found it to be very useful on "difficult to wave solder spots", but it is not as fast as a wave soldering machine. It mi
Electronics Forum | Wed Nov 15 06:44:54 EST 2000 | andy
John , I had some experience of selective solder in a high throughput environment and though the quality of s/s was good , the throughput was not . So if throughput is an issue , forget it . I would go with the hand-solder option , although as has be
Electronics Forum | Sat Nov 04 22:26:33 EST 2000 | Aoki Laboratories Ltd.
Greg, The operating parameters for Wave Soldering are: 1. Preheat Temp. (80-110 c, board surface); 2. 1.5-3 secs dwell time in solder. This, 1.5 second, is the time required for both the lead and solder to gain sufficient heat and as a result "tinn
Electronics Forum | Wed Oct 25 12:38:05 EDT 2000 | Phil
Hi there!! You know what your QA is doing is right, coz by measuring the solder paste height can avoid the following defects: 1.Insufficient solder 2.Short solder or bridging 3.Solder balls SPC monitoring for paste height checking is required
