Electronics Forum | Thu Aug 12 13:34:03 EDT 2004 | gregoryyork
Yes unfortunately solder resist again, getting boring I know. That green stuff on the boards causes all kinds of problems if not applied correctly. Can't blame the flux (as usual) or the process as he has tried all varients to no avail and therosin s
Electronics Forum | Tue Aug 17 03:26:57 EDT 2004 | soease
Well, regarding the paste specifications, it's no problem to add yours if it's not allready defined in the default library; parameters are for example, soak temp min & max, liquidous, ramp positive max, spike ramp min & max, all timings and so on. n
Electronics Forum | Wed Aug 25 09:36:24 EDT 2004 | gregp
I have to chime in here. When I read some of these posts its seems as though alot of people are dealing with outdated equipment (or at least equipment that was not designed for today's manufacturing environment). Gone are the days that you could h
Electronics Forum | Mon Aug 30 16:07:06 EDT 2004 | Shean Dalton
Hi Chen, Based on your posted message, the following ideas are for your consideration: "brown residue" The water soluble solder paste you are using could be a water soluble rosin solder paste formulation. Perhaps the solder paste may not be proper
Electronics Forum | Wed Sep 08 17:49:19 EDT 2004 | gregoryyork
Knock off some balls and you may find it has a flat bottom to it were it has mechanically stuck to the solder resist usually seen under 60X magnification. Common with Liquid photoimageable resist (I know again) Best way to check resist cure is to pay
Electronics Forum | Tue Sep 28 17:56:02 EDT 2004 | Vee Sar
Adam, I would first check hole to lead sizes on the components that you are having hole fill issues with to see that the spacing is withing spec. Second, check for oxides on lead tips, and contaminated leads that cause poor wetting and insufficient
Electronics Forum | Tue Sep 14 14:25:35 EDT 2004 | scombs
Thanks everyone for all the input. All of our stencils do have the PCB # etched on the foil but when operators look for the stencils they are looking for the part # on the frame since they are all stored vertically in a couple of Remstar shuttles and
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 | 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 | Wed Oct 06 09:23:51 EDT 2004 | mikecollier
The sampling rate on the KIC software can be changed by the user. The default setting is a sample rate of 60 seconds, so that, every 60 seconds the "old" measurement is subtracted from the "new" measurement to calculate the slope (i.e., start temp i
