On 08/06/2012 04:06 AM, andy pugh wrote: > On 6 August 2012 03:46, <ceen...@in-front.com> wrote: > >> My thought was to get a fairly low volume diesel direct injector (i.e. 1L to >> 2L 4-cyl diesel car) and grind away the lower section of the nozzle which >> has the 6 or 8 pinholes to allow solder paste to exit a bit more freely. > You can't use a Diesel injector for that. Apart from problems with > viscosity the injectors are piloted, and _require_ 200bar to operate > the internal mechanism. > I suspect that some of the clearances are smaller than the solder > paste grains too. > > Perhaps a peristaltic pump?
a few years ago, i saw a prototyping machine, that used a syringe, to deposit solder directly onto a SMD pad. It basically touched down on a pad, and then deposited a tiny amount of solder, while retracting. then, it rewound the syringe's stepper, a couple steps, to keep solder from dripping. It was slow, but it worked. The company folded, and I never could find out what happened to that machine. I know that it worked on 0805, and SOT packaging, whether it worked on anything finer, I never saw. -- -Mark Ne M'oubliez ---Family Motto Hope for the best, plan for the worst ---Personal Motto ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
