Electronics Forum | Tue Oct 28 19:47:05 EDT 2008 | davef
Your gold might be a bit thin after you consider fabricator's tolerance. IPC-4552 ENIG specification: * Ni thickness: 3 - 6 microns [120 - 240 microinches]. * Au thickness: 0.075 - 0.125 microns [3 - 5 microinches]. * Recommended specification is
Electronics Forum | Thu Nov 06 10:10:38 EST 2008 | mendcorp
Regardless of what people tell you, there is only one way, I will repeat it ...."ONE WAY" to have void free solder if using flux. You must have capitol equipment capable of pulling a vacuum as soon as the solder reaches liquidus state. (Pink oven or
Electronics Forum | Tue Dec 09 18:11:06 EST 2008 | davef
Just to keep this up in the air, go to the http://www.ipc.org free download section. There is a contract assembler questionaire that could be a good starting point for what you seek to accopmlish. Check it, get back to us and maybe we can use that as
Electronics Forum | Tue Dec 02 18:10:39 EST 2008 | sys_steven
Need your opinion guys.. The old timers at the plant here feel that we should clean our board after Misprints withe the solvent cleaner over water wash. This is so they don't have to rebake the pcb for 24 hours before smt again. I don't believe th
Electronics Forum | Thu Dec 04 15:27:26 EST 2008 | jax
Check the spring tension on the reel holder. When the reels start running out of parts the spring can provide enough tension to keep the reel from spinning. I have seen this on some of the dual-lane feeders. Tape the spring back to verify. If this is
Electronics Forum | Mon Dec 08 07:52:22 EST 2008 | vleasher
Check the spring tension on the reel holder. When > the reels start running out of parts the spring > can provide enough tension to keep the reel from > spinning. I have seen this on some of the > dual-lane feeders. Tape the spring back to > ver
Electronics Forum | Sat Dec 06 09:38:39 EST 2008 | eksoftware2
We are going to convert a Leaded Wave machine (EMS Stallion) to Lead Free. Can we just empty the pot of leaded solder, run it with pure tin for a bit and then put in SN100 bar? What's the score with SN100? Oh and does anyone have any paperwork for
Electronics Forum | Wed Dec 10 05:11:55 EST 2008 | gregoryyork
I would first check to see what the maximum temperature this operates at I remember seeing my first one on Ebay the other day and it is a small bench mounted machine. You need to ensure the solder bath will operate up to around 260 - 270C. ALL Lead F
Electronics Forum | Wed Dec 10 16:15:24 EST 2008 | terryl
on the front end in design, minimize the pth connections to ground planes. this takes alot of work by the pcb designer and the approval of the design engineer. connect maximum of 4 ground planes to pth, minimum 1 plane. use spoked connections. ev
Electronics Forum | Thu Dec 11 07:29:58 EST 2008 | jdumont
I have done a few studies on this issue here. As a result we have increased hole diameter on heavily ground planed pins to a min of .015" over the lead diameter as well as preheating the PCB when hand soldering. I have also had to order the upper pre
