Electronics Forum | Fri Apr 30 10:34:16 EDT 1999 | Ryan Jennens
Mornin! We just had vendor in here pitching a "low-temperature rework system" which was intriguing, but too expensive. He did get me to thinking though, beyond heating ceramic caps before hand-soldering them, it seems like it would be advantag
Electronics Forum | Thu Jul 23 07:33:28 EDT 1998 | The Wretched SMD
200 boards/Hr and oven will reflow ~180 boards/Hr but the P&P machine will only place 700-950 CPH when setup is taken into account. Minimum pitch is normally .020" and we place an Avg. of 491 TSSOPs and 217 BGAs a month. We don't even bother with 04
Electronics Forum | Tue Jul 14 19:40:43 EDT 1998 | Steve Gregory
| Ben and others, | The banner problem has been fixed and your "Back" button should | work as usual now. Sorry for the inconvenience. | Cunli Thanks Cunli!! I guess I was having the same problem after all...the page was loading up, just real sl
Electronics Forum | Thu Jun 18 21:13:22 EDT 1998 | Dave F
| I am looking for a quickly obtainable procedure on the repair of SMT boards. I am particularly interested in discrete components, such as | capacitors and resistors. | I need to know the importance of pre-heating the board and components. What is
Electronics Forum | Fri Jun 19 21:00:20 EDT 1998 | Dennis O'Donnell
| | I am looking for a quickly obtainable procedure on the repair of SMT boards. I am particularly interested in discrete components, such as | | capacitors and resistors. | | I need to know the importance of pre-heating the board and components. Wh
Electronics Forum | Wed Dec 31 23:02:19 EST 1997 | Scott McKee
| Has anyone had any experience with thermal shocking | and cracking of SMD capacitors during the rework process? | My company was advised to preheat capacitors to 125 C | at a rate of 2 C/sec before replacing them onto boards. | Would this maybe
Electronics Forum | Tue Sep 04 13:41:52 EDT 2001 | Brian W.
IPC7912 deals with the end result, ie an OEM getting boards from a contract manufacturer. I have a friend who is sitting on these committees. He tells me there is a new standard due out for actually doing in-process DPMO. From a process standpoint
Electronics Forum | Tue Feb 19 14:00:55 EST 2002 | global
We have had some discussions about what causes parts to lift out of the holes when going over the wave on our flow solder machine. The machine being used is a Treiber (700 series). There are two bottom pre-heaters and one top pre-heater. We try to pr
Electronics Forum | Mon Jun 17 15:04:08 EDT 2002 | genny
I think I had my units wrong in my previous post - that blueprint job was 6 years ago and fading fast. My level of 700 would have the same units as Dave's level of 1000. This is the metric measurement of lux, vs the imperial footcandles. fc to lux
Electronics Forum | Thu Nov 14 10:03:40 EST 2002 | davef
Doug, Ooooooooo. You're correct Vinny has to be talking about Rogers teflon boards. Vinny, There are many different types of PTFE based products. Generally speaking, PTFE has a melting point of 620degF and withstands solder reflow and HASL proce
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