Electronics Forum | Thu Nov 06 09:27:46 EST 2008 | rway
I would rethink your schematic. If you are using D1 for power indication, put D1 in series with a 1KO resistor to ground. D1 will 1.5-2.2V which will your supplies voltage to your 555 timer. What are you driving on the ouput at pin 3? If you ar
Electronics Forum | Wed Nov 05 18:39:06 EST 2008 | joeherz
Hello, We have recently installed a selective soldering machine and are seeing some voiding/cratering in random locations. We have done some basic experimenting with fluxing parameters, preheat and dwell times but haven't been able to eliminate it.
Electronics Forum | Sat Nov 08 09:10:16 EST 2008 | davef
SN100 was designed for selective soldering and producing low levels of voiding. But thin barrel plating is a common cause of voids in wave and selective soldered connections, as you say. As a result, you checked the plating thickness and it was accep
Electronics Forum | Tue Nov 11 19:41:06 EST 2008 | gregoryyork
Thats the problem residual residue from HASL fluxes Lead free especially are worse.Very hygroscopic and out gass and produce dewetting as well over wave soldered boards especially. Leave iron on blown joint and will after several seconds fizz and pop
Electronics Forum | Wed Nov 12 18:58:19 EST 2008 | joeherz
I attended SMTA's copper dissolution webinar this morning and am almost convinced that this is not our problem. Still planning to do cross sections to verify but our dwell times are nowhere near levels that could cause a problem assuming good platin
Electronics Forum | Mon Nov 10 13:27:07 EST 2008 | evtimov
Hi janz, you should be aware of everything. You are going to change subsystem on your machine. How much vacuum you need on the machine? Can you control the vacuum level with your system? Can you control the the system at all? Is it really much more
Electronics Forum | Fri Nov 07 23:40:41 EST 2008 | padawanlinuxero
I have been working on the SMT area for a while now, must of my experience is on programming and pick and place, now in my new job I have to control a complete SMT line and I have a little knowledge on working with solder paste but I like to read mor
Electronics Forum | Sun Nov 09 21:52:26 EST 2008 | phomann
Hi, I have acquired a Fisnar I&500 Solder Robot that has not come with the expected manuals and software. The machine is a 2001 vintage. CAn anyone help me with obtaining the operating/service manuals for the base unit. I have managed to get the m
Electronics Forum | Fri Nov 14 03:41:26 EST 2008 | kywl
For your pad layout and spacing between > components, look here: _a class=roll > href="http://portal.ipc.org/Purchase/ProductDetail > .aspx?Product_code=77b562c1-b8f8-db11-8a6a-0050568 > 75b22" > target="_blank"_http://portal.ipc.org/Purchase/Pr
Electronics Forum | Fri Nov 14 08:06:43 EST 2008 | jdengler
Have you figued out how to import the gerber data into Camtastic? Once that is done click the tool menu at the top then the assembly utilities then create and group parts. This will allow you to select the pads for a given package and name it the
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