Electronics Forum | Mon Nov 26 14:27:49 EST 2007 | wayne123
I am using a search area of 2.5mm and I use a Red dot sticker to cover up board fids to not be built. I have it set to reflect. threshold is around 100 but that could be different depending on what you are using to cover up your fiducials with. I w
Electronics Forum | Thu Dec 06 11:19:34 EST 2007 | samir
AMEN TO THAT! The only problem is...what's left of U.S. Electronics Manufacturing is Contract, and as most of us in the CM world can attest to, our customers violate DFX guidelines left-and-right. I agree, also, that the PCB layout guy who also kno
Electronics Forum | Thu Dec 06 23:41:33 EST 2007 | er_pe
Not only is "designing for the processes is good", it should be required and enforced. Obviuously, one should not conider 'every' design rule - but on most observations. Otherwise those 'smart' OEM's often loose out in the long run. Pssst - they'
Electronics Forum | Sun Dec 02 20:02:23 EST 2007 | chs
Hi, There are QFN 32,40,48 pins with middle pad. Body size are 7x7 and pitch 0.5mm. I means as compared to 2 sided package, QFN are easily damaged by external mechanical / thermal force. Phenomenon observed are mold cap open which further caused wire
Electronics Forum | Fri Nov 30 17:13:36 EST 2007 | stevek
Not sure about that model, but I've used several DRS 22's and find them easier to use than the DRS24 I inherited at my current place. The lack of automation makes doing things yourself easier. The newer automated machines need more programming. I'
Electronics Forum | Thu Nov 29 20:29:07 EST 2007 | b4tt1e
Thanks Jon, indeed it sounds simple from your reply. But unfortunately I'm not a mechanical engineering student :( beside, my final year project is something about motors control and sensors. My supervisor suggest me to take a look at the feeder comm
Electronics Forum | Thu Nov 29 22:10:53 EST 2007 | lito_visaya
To anyone with extensive reflow experience, We have an 8-zone reflow intended for reflow soldering of our lead-free models, but sometimes, we use the reflow for soldering of non lead-free. Does it holds true that our lead-free products may be c
Electronics Forum | Sat Dec 01 21:59:35 EST 2007 | kenferrer
Hi Eng. Yumex in our company we're using 9 zones air convection oven. When the technology on Lead Free came along conversion from non-lead free to lead free viceversa was frequently done but there's no problem on contamination. Where is your company
Electronics Forum | Tue Dec 04 14:26:56 EST 2007 | ratsalad
We use the same oven for both Pb and Pb-free assemblies. We have been for about two years. We have not seen any issues with contamination. I can't imagine how any Pb would end up in a Pb-free joint in the reflow oven. The Pb doesn't vaporize, the
Electronics Forum | Wed Dec 05 03:52:15 EST 2007 | longlee
I disagree with the opinion what use the same reflow oven for both Lead and Lead-free process. As you know, the RoHs restrict the presence of certain substances, including Pb,Mercury,Cadmium,Hexavalent Chromium,PBB,PBDE. Maybe yon don't find any iss
