Electronics Forum: dipping (Page 46 of 58)

BGA Rework - flux dispensinx issue

Electronics Forum | Tue Nov 04 07:50:14 EST 2008 | davef

Sure. Here's what you should do to apply repeatable amounts of flux on BGA during rework: * Squirt some gel flux on a plate or something like that that has a flat bottom and raised sides to corral the flux. * Cut notches into one edge of an old credi

Solder voids in PTH

Electronics Forum | Sun Aug 19 15:34:20 EDT 2007 | davef

What are you trying to do: * Improve hole fill? * Reduce PTH voiding? Hole fill: Search the fine SMTnet Archives for stuff like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=36063 PTH voiding: Ideally, there are no voids. We're unawar

SMT placement machines. Where are we going ?

Electronics Forum | Wed Jun 03 16:26:37 EDT 2009 | wisch123

The most innovative new technology today is ccoming out of Fuji. They don't really advertise, so if you haven't gone to a show lately you might not have seen it. The machine is call the XPF-W and it sets the new standard for quality, accuracy, reliab

Borderline, unbalanced squuegees

Electronics Forum | Tue Jul 07 12:50:33 EDT 2009 | davef

First, we don't know dip about nonbalanced squeegee. We clipped the above gif from: Solder Paste Printing Inspection: An Inside Look; E Litman, System Engineer, Orbotech; SMT January, 2004 Second, Tekscan talks about a product: I-Scan force and pre

SN96 solderability on electrolytic tin

Electronics Forum | Thu Nov 19 13:49:00 EST 2009 | bricke

We have been manufacturing a part using bright electrolytic tin as the finish. Our customer has been hand soldering using 63/37. They have recently switched to SN96 and have been experiencing solderability issues. We have sent samples to an outside

Solder Paste Printing to 0.005

Electronics Forum | Tue Jan 04 09:26:22 EST 2011 | scottp

We've been doing this for over 10 years using flux. We print a tacky flux first using an 0.002 or 0.003" thick stencil, then print paste using a thicker stencil with the underside half etched to keep it away from the flux. In our case, we can't jus


Electronics Forum | Mon Mar 07 09:15:03 EST 2011 | remullis

Reese, Thanks for the response. I agree with all of your comments, and actually we have SMT capability now. I also worked previously for a company for 20 years where we done primarily SMT and through the years phased out as much TH as possible, espe


Electronics Forum | Mon Mar 07 16:36:37 EST 2011 | remullis

I have been working on collecting data all day today. We are a OEM so our RMA and QA system is tied together. I have taken this data and broken it down by part type and individual boards. We had 264 (defects/rma returns) of that, 88 were NO Faults. O

Stacking/piggyback chip.

Electronics Forum | Tue May 24 13:18:43 EDT 2011 | leemeyer

We had a Quad 4C that was fitted with a dispensing nozzle. It was perfect for jobs like this. Place the 1st component in the paste, add a dot or 2 of paste to the top of that part and then place the 2nd component on top. I beleive that you may be ta


Electronics Forum | Mon Feb 20 14:56:22 EST 2012 | acsscott

Ok, so we figured out that if the LCS is connected, we don't get the error. So, the HDLC data buss gos out and back, or is terminated in the LCS. How to remove the LCS? We try to go into maintenance screen to change the machine configuration, and

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