Electronics Forum | Tue Oct 24 08:51:34 EDT 2006 | markb
aj, Did you have to implement a pre-bake operation prior to SMT? Or did the new batch work just fine with your current process? Just curious if we should be implementing a pre-bake process, or keep pushing on our supplier...or both. Thanks, Mark
Electronics Forum | Mon Nov 19 14:10:13 EST 2007 | realchunks
Hi Taint, Both machines work OK. The big thing you may over look is pre-heat. Things like flux spatter/boil tend to come into play if you don't pre-heat. Change over, ease of programming, and service are also things to think of.
Electronics Forum | Thu Feb 13 14:20:19 EST 2014 | globalpowerproducts
we set the pre heaters the same as the Electrovert. On the SHEO wave solder it is a much longer conveyor so we only turned on the last two pre heaters to match the Electrovert
Electronics Forum | Fri Sep 20 11:11:12 EDT 2019 | SMTA-Ernest
Are you interested in trimming pre-solder or post solder? Roto Form Corp. which I believe is located in Tennessee. This machine incorporates a small rotary cutting head for post solder trimming. Otherwise pre-solder trimming is required suggest co
Electronics Forum | Mon Aug 03 17:15:56 EDT 2020 | rgduval
In general, no. If you've got the right BGA rework equipment, you should be able to locally heat the part area that you're reworking. Though, if you're finding defects related to thermal stress, it might not be a bad idea to pre-heat the rest of th
Electronics Forum | Thu Sep 03 19:48:36 EDT 2020 | charliedci
Not in our case, the pre-heat temp was not high enough. Also our pre-heat is only from top (KISS104).
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 | Wed Dec 22 18:09:07 EST 2004 | kmorris
At a previous job I had been taught that when reflow soldering polyimide flex circuits, it was necessary to pre-bake them before reflow soldering to prevent delamination. Our procedures said that there must be a 1hr bake prior to reflow, and the flex
Electronics Forum | Sat Apr 30 13:56:31 EDT 2005 | steve
My experience with different size boards and pre-heaters. The perfect world (right?) you would saturate the complete pcb with bottom pre-heat. But it is difficult with repair and rework equipment, not to mention the expense and foot print of large pr
Electronics Forum | Fri May 07 02:37:31 EDT 1999 | Bob Willis
| 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 ad
