Electronics Forum | Fri Sep 24 12:02:57 EDT 2004 | Frank
Yes, I can see your problem, the nozzle makes only good contact in the center and so the ends don't make good contact. The ends tend to curl up during reflow. There were two suggestions to solve this. 1) Let the operator push down the labels befor
Electronics Forum | Thu Sep 23 11:56:30 EDT 2004 | rkevin
We are printing on an assembly using SAC305 Alloy Sn96.5 Ag 3 Cu .5 with a no clean flux and getting virtually NO spread with either a ramp to spike or straight ramp profile. We are printing to standard FR4 board with immersion Ag finish. I am trying
Electronics Forum | Thu Sep 23 16:23:08 EDT 2004 | russ
Pb free pastes do not wet out like 63/37. Their are no claims from any manufacturers that I am aware of that say it will. Your "little solder balls" are likely caused from oxidization during reflow. What type paste are you using 3,4,5? What are t
Electronics Forum | Thu Sep 23 23:42:52 EDT 2004 | KEN
The LF pastes will have virtually NO wetting spread. This is normal. LF mobilities are virtually non-existant with SAC alloys. However, the addition of varrying amounts of silver can (and does) improve mobility but, this comes with a price (paste
Electronics Forum | Fri Sep 24 12:20:58 EDT 2004 | Simon UK
Hi there, I have been using DEK's of all types over the past 9 years, with a few SMTech's and MPM's thrown in for good measure. I personally would recommend using DEK, they may seem expensive, but i find that worth the cost with the good support we
Electronics Forum | Fri Sep 24 22:43:07 EDT 2004 | FengAng
Hi Rob, We use the most advanced equipments in front end, but the back end we always use manual assembly, including display, LCD, casing. It's all because we should balance the cost & efficiency. I think if you are the boss, you will also do thing
Electronics Forum | Sun Oct 10 13:01:46 EDT 2004 | Johnathan
Hello I am a businessman located in Atlanta Georgia USA. The name of my business is Techmania. We area a technology sales and service company. What do you think of the possibilities of purchasing from European and Asisn manufacturers the parts near
Electronics Forum | Wed Sep 29 12:10:53 EDT 2004 | Simon Uk
Well for us 'limeys' its more difficult holding on to a job in the OEM/CEM marketplace. There are very limited opportunities for moving to other jobs here, we too like the US are losing a 'hoard' of jobs to China,India and other cheaper climates. Pr
Electronics Forum | Thu Sep 30 04:17:03 EDT 2004 | loz
Screen printing glue is definitely easier and more repeatable than using dispense methods (my opinion). Depends a lot though on pcb design and component mix. Contact your stencil vendor and they will be able to suggest different apertures, such as li
Electronics Forum | Fri Oct 01 04:31:08 EDT 2004 | pioneertechnology
Hi Marcel I bought four BTU ovens a couple of years ago at auction and had the same problem where two of the ovens had software and two did not. I loaded in the software I had onto the two ovens and this only partially worked as the software is con
