Electronics Forum | Mon May 03 16:36:08 EDT 2004 | Kris
Try getting a small contract manufacturer who will build the boards for you initialy that way you can learn untill you establish the process once you do that you can have a fair idea of what machines to buy ? where to buy ? or maybe if the volumes
Electronics Forum | Wed Jun 16 23:41:31 EDT 2004 | rodionp
ricardof Unfortunately I cannot comment on many of your questions however I can lead you to one important article as to basic assembly optimization techniques to maximise throughput (or minimize assembly time, which is pretty much the same thing...)
Electronics Forum | Tue Jun 15 09:26:00 EDT 2004 | johnthor
There was a thread in the IPC TechNet a few days ago about this subject. Basic conclusion was that there is a reliablility concern if the lead free balls don't reach liquidus with the Pb profile. Haven't tried it myself. John Thorup
Electronics Forum | Mon Jun 28 14:48:56 EDT 2004 | jdumont
Yes i was looking around that site this morning and found everything i needed. Thanks to all. Basically what im trying to do is justify the expenditure of a new NO2 generator for our IC cabinets. Ours died a little while back and we have been using
Electronics Forum | Thu Jul 15 07:08:29 EDT 2004 | pcbrown
Basically, it's a tilting problem of certain devices. Usually with axial by-pass caps tilting, which pulls the lead up through it's mounting hole. Other problems with components with leads cut to lenght to eliminate post-wave trimming. All suggestion
Electronics Forum | Thu Aug 26 22:10:43 EDT 2004 | KEN
I work for a CM that is a principle PCBA supplier for Cognex. We have not seen these legacy systems in many, many years. However, the cognex 8000, IS1000, IS2000 systems are still running strong in many OEM vision applications (especially recently
Electronics Forum | Thu Sep 02 22:39:58 EDT 2004 | davef
Comments are: * Few of us use IR reflow. It has been replaced by convection or a combination of convection and IR. * Follow the recommendations of you paste supplier in determining the initial thermal recipe for your oven. * Look here to learn more
Electronics Forum | Fri Oct 22 04:09:22 EDT 2004 | christina
Is there anyone who knows the yield rate difference for SMT on multi-flex boards and rig-flex boards ? Basically, I think the yield rate should be higher for rig-flex than multi-flex due to the poor dimensional stability of polyimide, since multi-fle
Electronics Forum | Tue Oct 26 00:49:42 EDT 2004 | pilengr_tw
Yes, we have an SOP on how to measure. Basically, calibrate the measuring device and measure tension on the 4 sides and one at the center of the stencil. All measurement should be within 30 ~ 50 N/cm otherwise we will not use it and return it to sten
Electronics Forum | Tue Jan 18 10:55:24 EST 2005 | mmjm_1099
I personally use CP43 and QP341 and thats it. We are a small house so much isnt needed besides this. I have placed from 0402 and larger in the CP and basic IC and QFP in the QPs. I have been drooling over the NXT machines. http://www.fujiamerica.co
