--- In
Homebrew_PCBs@yahoogroups.com, Slavko Kocjancic <eslavko@...> wrote:
>
> javaguy11111 pravi:
> > --- In Homebrew_PCBs@yahoogroups.com, Slavko Kocjancic <eslavko@> wrote:
> >
> >> At 08:48 AM 5/28/2010, you wrote:
> >>
> >>>> I have had thoughts of doing something similar in the past.
> >>>> You might want to take a look at this site.
> >>>>
> >>>> http://www.slac.stanford.edu/exp/mps/FCS/FCS_drop.htm
> >>>>
> >>>> I think it is about the simplest design I have seen for a
> >>>> droplet ejector that might be feasible for a serious hobbyist
> >>>> to build.
> >>>>
> >>>> --- In Homebrew_PCBs@yahoogroups.com, Slavko Kocjancic <eslavko@> wrote:
> >>>>
> >>>>
> >> Seems very nice but how piezo is attached is very unclear.
> >>
> >>
> >
> > >From the site
> >
> > "A piezoelectric element adhesively attached to the reservoir tube "
> >
> >
> >
> >
> I can read :D
> But from picture/text I can't know how is realy done. Does piezo have
> hole? Is that glas tube splited at pieco? Just not clear enought to be
> sure how to deal with it.
>
It looks like the piezo has a hole. I am assuming that the attachment is using epoxy.
Doing a search on "ejector design Steven Zoltan" gives several hits on additional designs. A bit more research would need to be done to understand how the impulse from the piezo element gets transferred to the glass and then to the fluid. Some time modeling with an FEA program would help in understanding the exact mechanics of process and optimize the design.