Electronics Forum: (4) (Page 141 of 630)

Easy and inexepnsive SMT machine?

Electronics Forum | Thu Mar 24 09:33:45 EDT 2011 | bobpan

An old quad 2C/4C with a workholder will probably fit all those numbers. 2Ft is pretty long though and that might be a little too long. Machine price range is about right. Programming is pretty easy. Good luck

Solder beading with PCB from different fab

Electronics Forum | Tue Apr 05 11:59:41 EDT 2011 | grahamcooper22

maybe the pcbs need a proper dry (the quick dry in the reflow oven won't get all the moisture out )...maybe 125 C for 4 hours or speak to the manufacturer to get their recommendations.

Wave Solder

Electronics Forum | Fri Apr 22 14:19:29 EDT 2011 | cbeneat

Patrick, It actually seems to go away after every adjustment. Whether it's flux, heat, doesn't matter but it always reappears. The part that has me baffled is the fact that another identical part is approx. 4 mm away, and never affects this one.

Need Solder Ball 95.5% Sn 4.0% Ag 0.5% Cu

Electronics Forum | Mon May 09 10:03:26 EDT 2011 | markhoch

I would contact one of your solderpaste manufactuers. (i.e Indium, Alpha Metals, Kester, etc)

Need Solder Ball 95.5% Sn 4.0% Ag 0.5% Cu

Electronics Forum | Thu May 19 19:28:31 EDT 2011 | Rstadem

Try Easyspheres (Kester), or Q-Pearls (Qualitek), or Alpha. They all have solder spheres in that alloy.

Need Solder Ball 95.5% Sn 4.0% Ag 0.5% Cu

Electronics Forum | Tue May 24 16:44:42 EDT 2011 | ppcbs

Thanks everyone. I was having a hard time to find someone with immediate stock, reasonable price, lead time, or min order. I found some though and have extra stock now if anyone needs some.

CT Scan system for BGA inspection

Electronics Forum | Mon Jun 27 07:23:22 EDT 2011 | edmaya33

North star Imaging and Dage CT can do a non destructive cross-sectioning. http://www.4nsi.com/industrial-x-ray-news/large-demand-for-nsi-x-ray-and-ct-systems

cost reduction

Electronics Forum | Wed Jun 22 16:29:27 EDT 2011 | davef

Here's a start 1. Eliminate nonconforming material 2. Eliminate parts shortages 3. Reduce configuration changes 4. Stop rework, software changes 5. Eliminate assembly errors

PCB Washing No Clean

Electronics Forum | Fri Jun 24 12:32:06 EDT 2011 | ppcbs

You should look at Amtech Solders. They have excellent no-clean fluxes that are designed to be water washable if desired. We have been using them with great results for about 4 years now.

Quad IVC Motor Error 4

Electronics Forum | Wed Jul 06 09:10:55 EDT 2011 | bobpan

i have seen bad motor cables cause the problem......you can ohm them out to the driver cards or if you have extras....replace them Bob


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