Electronics Forum | Mon Jan 29 16:54:44 EST 2007 | slthomas
Some NC gunk is somewhat prone to raising a ruckus with rf circuits. Here's a smattering of info. re: that. It's been discussed and is present in the archives in a number of threads. http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFA
Electronics Forum | Thu Jan 25 12:18:40 EST 2007 | wagoner
There are several smd components in our factory that don't reliably wet to solder during reflow. Paste and placement are good, but the component won't wet reliably. All of the other components on the boards solder fine, but one of these components
Electronics Forum | Thu Jan 25 13:20:17 EST 2007 | slthomas
Are you running a lead free process? If not, have you identified these as lead free components? If so, have you increased the temps in your profile to accomodate that? After that, I'd look for a AgPd (silver/palladium) or some other such PITA platin
Electronics Forum | Thu Jan 25 17:14:44 EST 2007 | slthomas
Good luck with that. ;) More likely you'll have to adjust your profiles. In our case with the palladium terminations we had to touch them up. There were other parts on the board that couldn't take more than 5 seconds at ~235 C� (don't remember for s
Electronics Forum | Thu Jan 25 13:49:57 EST 2007 | John S.
James, We have 3 750's that are 5-8 yrs old. Never any major issues. Juki's service and support are the best. We bought a 2060 1 year ago and have been pleased with it. We placed a 20 mil pitch QFP with a spec of +/- 0.003" to test the machine.
Electronics Forum | Fri Jan 26 11:12:51 EST 2007 | realchunks
Taking a pole for s&g's. Just got out of a meeting and the customer said the solder joint of the parts only occurs at the fillet. "Without the triangular part of the solder there would be no solder joint." These where actual words spoke. I know d
Electronics Forum | Mon Jan 29 17:25:10 EST 2007 | darby
I'm confused, How can your customer possibly EXPECT a fillet if the pad is smaller than the part? I thought everyone was over the whole toe fillet thing many years ago. Wasn't there some papers from NASA nearly ten years ago that advocated the "less
Electronics Forum | Tue Jan 30 14:12:12 EST 2007 | blnorman
We use nothing but silicones and have for at least the last 7 years. We don't have relays, but we do have motors. No issues with soldering, but our lines are constructed such that the last solder operation is a good distance from the coating or pot
Electronics Forum | Wed Jan 31 14:07:24 EST 2007 | electronhose
Material, fumes, cured or uncured, all are suspect. Silicone gets on an operator's hands, that operator handles components ( even a day or more later ) silicone is transferred to the solder connections = contamination. Process and workcell control
Electronics Forum | Mon Jan 29 02:06:06 EST 2007 | Guest
My inputs are : Juki are easier to use, and to easier to program. Their Man Machine interface are easy to navigate. Good technical support Technology wise , they will be one of the best in placement equipments iin the future . You may want
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