Electronics Forum | Sat Feb 15 15:39:53 EST 2003 | Joe
I have the identical machine and setup as you with the same issue(s). I looked at setting up for N2 but am choosing to retrofit to a standard lambda nozzle setup. If you are soldering bottom side SMT parts or other challenging assemblies, N2 may ma
Electronics Forum | Thu Feb 20 10:56:49 EST 2003 | larryk
Interesting topic, I got a side bar question. The epoxy companies suggest a lower consistant temp (something like 1 minute at 160 degrees) for curing. But we epoxy and paste our boards that get waved. (I know, why are ya pasting a board that goes t
Electronics Forum | Fri Feb 21 11:33:47 EST 2003 | Jaime
Call your glue manufacturer. It sounds to me that the epoxy is not curing properly. You should also test for shear strenght. How many pounds of pressure does it take to "pop" a cured component after it comes out of the oven? What type of oven do you
Electronics Forum | Fri Feb 21 00:15:04 EST 2003 | MA/NY DDave
Hi I see David F already gave you some good sources, most of which I recognize. There are or used to be somemore even in your neck of the woods so keep on checking. SMT Plus rings a bell in my head, and check the magazines on the web like Circuitry,
Electronics Forum | Tue Mar 04 13:27:39 EST 2003 | MA/NY DDave
Hi Wow Genny, I don't think I could have given so much detail so fast. I have designed some high RF test designs for testing purposes to pass only the High Frequency, yet I didn't want to muddy the water with this other side. Now you did it well a
Electronics Forum | Fri Mar 07 10:51:53 EST 2003 | dphilbrick
Another value add of N2 is when you are running a gold over nickel process it is recommended that you reach a peak of 220c instead of 215 when running in air. When you add N2 you can maintain that 215 number with the same results. If you look at your
Electronics Forum | Tue Mar 11 13:42:07 EST 2003 | MA/NY DDave
Hi As I got thinking about your problem, as you stated it, I am wondering if maybe we have some oxides or too thin of a Gold Immersion layer so that some of the underlying NI is being oxidized. The colorization that you described is what intriques m
Electronics Forum | Wed Mar 12 17:53:52 EST 2003 | davef
O' Connor Haaa. It's usually the design guys that foist the problems onto my desk. Now that is one shrewd process type that you have working at your company!!!! Can I have his / her name and number to get some tips on the technique that he / she
Electronics Forum | Fri Mar 14 09:23:52 EST 2003 | MA/NY DDave
Hire a Consultant to look at everything (Again lots to be looked at and worked... (Starting right at Board Design 2>Buy or borrow some of the Books on SMT and read about all the potential contributors. Yes Uneven or Goofed Up Oven Reflow as noted
Electronics Forum | Thu Mar 13 15:13:17 EST 2003 | ruggi
That's a good idea...and to add on to it, you could wash after the wave, too--it really doesn't matter. A question about this though--unless your Customer specifically requires "clean", no-clean flux whether it's ugly or not, is permitted by IPC,
