Electronics Forum | Sat Feb 22 11:27:16 EST 2003 | stefwitt
In the early days of SMT we were using vibratory bulk feeders for chip components. It was quite obvious that some of the components had to try several times getting through the gravity trap or with the right side up through the light sensor. As a res
Electronics Forum | Tue Jun 10 11:07:33 EDT 2003 | fmonette
Another important element to consider is the impact of ambient temperature and humidity on Moisture Sensitive Components. The majority of plastic encapsulated ICs are classified as moisture-sensitive devices (MSD). This means that they are qualifie
Electronics Forum | Wed Aug 06 14:52:15 EDT 2003 | cyber_wolf
Checking the vacuum at all stations is a good place to start. A vacuum guage with a piece of hose attached to a CP nozzle is a very handy tool to have. If you notice less vacuum at any one of the stations, you can start by looking @ the spool valves
Electronics Forum | Thu Aug 21 14:23:56 EDT 2003 | kenBliss
In order to service your wave solder machine safely, the following needs to be understood. Ladling dross out of the machine and putting it in into a coffee can or similar is not safe and puts operators and other employees at risk. Protecting the se
Electronics Forum | Tue Feb 24 14:44:22 EST 2004 | davef
IPA is a poor choice for a cleaning solvent. * As you mentioned, the flash point of IPA (~12�C TCC). This is sufficiently low that all electrical equipment within a few feet of the bath should be flameproofed or intrinsically safe, if you don't want
Electronics Forum | Fri Mar 05 19:17:00 EST 2004 | Ken
I have had OSHA strap accumulative "sniffers" onto wave operators and maint. tech's. THe sniffers collect air bound particulates and trap them into a filter. Later the filter is analyzed and an operator exposure rate is determined. They also will la
Electronics Forum | Wed Jan 12 10:05:20 EST 2005 | Dreamsniper
we are using polyimide boards 6 inches x 7 inches, 2.5mm thick, 12 to 14 layers, for aerospace industries. I am using a long bake of 12 hours at 70'C prior to manufacturing or exposure to elevated reflow and wave soldering temperature. If schedule i
Electronics Forum | Tue Apr 05 15:31:15 EDT 2005 | Carmine Garboza
A dermatologist should be consulted. Contact allergies are tricky things and you can develop one from repeted exposure to almost anything. I've seen rashes breakout on my personell from wriststraps metal buckels, IC lotions, rubber gloves, finger cot
Electronics Forum | Thu Sep 22 06:54:14 EDT 2005 | Rob
Hi Gavin, Depends on what MSD class, but in general for the more sensitive parts if they've been opened & not used within the time limit it's rebake, add dessicant & seal. Our distribution side splits them down into more manageable/production size
Electronics Forum | Tue May 02 16:37:57 EDT 2006 | bhall
I have experienced the exact same problem with excess solder touching the plastic component body. The solution in my case was simply to replace the stencil. I was using a reusable stencil frame that had been worn out. I replaced the stencil with a so
