Electronics Forum | Fri Sep 17 19:27:50 EDT 2004 | debh
Are industry time standards based on actual time...or money? From a start to stop time on a multi-machine SMT line our time is well below standard. (Our company uses industry standard (I'm told) based on .09 sec. per placement.) However each pick an
Electronics Forum | Tue Sep 21 10:50:21 EDT 2004 | Andy
We are in the same position like you. We are in a tug-of-war with our QA with regards to this process. Their reason is that the machine is used for quality purposes which is to verify BGA solder quality so it must be under Quality. From my experience
Electronics Forum | Tue Sep 21 10:53:53 EDT 2004 | davef
We know nothing about Envivar UV 1244 and you weren't real clear about the details of the problem or the materials [eg, ws flux, solder mask, etc], but we'd speculate your adhesion problem goes back to the cleanliness of your board. First by 'alcoho
Electronics Forum | Tue Sep 21 11:34:10 EDT 2004 | davef
Several things to check are: * Ask Multicore if their flux res and your conformal coat are compatible. Conformal coats and NC flux res are notorious for having compatibily issues. * Conformal coat a bare board to determine if there is there is enoug
Electronics Forum | Sat Sep 25 08:59:59 EDT 2004 | davef
IPC-HDBK-830, Guidelines for Design, Selection and Application of Conformal Coatings says: A conformal coating may have several functions depending on the type of application. The most common are: * Inhibit current leakage and short circuit due to h
Electronics Forum | Tue Sep 21 11:22:20 EDT 2004 | rlackey
Hi Arvydas, Do you want a machine specified at 20K per hour or to run at 20K per hour? Regarding Chipshooters I've worked with Siemens, Philips FCM's, Fuji's, Panasonics & Sanyo/Universal and the best in terms of reliabilty by a long way were the J
Electronics Forum | Thu Sep 23 10:48:21 EDT 2004 | Mke
Hi, My experience in the past has been predominantly with Fuji, Universal and Siemens. I categorise each of these systems in different ways; 1) If I want bombproof reliability - I Choose fuji. There tough mechanical design ensures operation time
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
