Electronics Forum | Tue Oct 10 23:11:04 EDT 2023 | unsung
I've seen these machines flip over and left outside for weeks in the rain, heat, moisture and still work. Doesn't hurt to take clean it up just view the sensors.
Electronics Forum | Thu Jun 08 09:26:26 EDT 2023 | frankchan
placement> (curing)> reflow soldering> cleaning> inspection> rework SMT production process Surface mount process a. Single-sided assembly: (All surface-mount components are on one side of the PCB) Incoming inspection-solder paste stirring-screen prin
Electronics Forum | Thu Jul 20 04:20:03 EDT 2006 | Loco
Dave, I dont know if you run SMD solderside through your wave, but if you do, consider that most SMD is specified to 260 degrees. 280 would be way over.
Electronics Forum | Fri Apr 29 13:33:10 EDT 2005 | johnw
Hi if mail me and I will talk you over some process techniques John
Electronics Forum | Thu Feb 06 14:27:18 EST 2003 | MA/NY DDave
Hi You already have some good answers. Let me add just a little of what I know. You might want to check the IPC and obtain their guides on this technology. Also SMTA, NEPCON and others have technical proceedings on this technology. Checking with e
Electronics Forum | Tue Dec 30 20:48:31 EST 1997 | Tom Gervascio
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 degrade c
Electronics Forum | Tue Sep 28 04:16:18 EDT 1999 | Brian
| | | | | Jackie's posting recently and responses to it got me to dondering. First, recollecting, we bought an IR rework station a couple million years ago. It had a IR source on a stand, a bunch of lenses, and Reynolds aluminum foil for shielding
Electronics Forum | Sat Nov 09 08:04:52 EST 2002 | erhard
if you wave solder you have to glue the SMD parts on the bottom side. If you reflow the bottom side then you usually shouln't go over the wave afterwards. It's quite logical the joints melt again, that's what you want to achieve going over the wave.
Electronics Forum | Fri Apr 15 11:16:03 EDT 2005 | HOSS
It's a longshot but.....I have seen low-standoff parts move caused by via's under the part erupting from within internal layers (outgassing). If this is a multilayer PCB and vias are not well plated or pourus, they can and will expand when heated.
Electronics Forum | Wed Mar 15 11:29:38 EST 2006 | cjd
Anybody ever use SAM to inspect a bare pcb? What can you see? Is the scatter noise so bad you can't even see the copper layers? I would think you could at least see to some depth and then flip the board over. I work in a R&D environment so speed
