Stefan Trethan wrote:
VeeJet series:
http://www.spray.com/catalogs/sg_EtchingRinsing.asp
I was able to find what type of nozzles typically used by spray etch
machinery manufactures. For fan type nozzles the fan angle is between
50° and 80°. I decided on 65° angle.
As for the nozzle size, I had to plot a graph showing pressure vs flow
rate for both the pump and nozzle. Where the two graphs intersect is
where the operating point is. After some shuffling around of figures , I
went for three "size 8" nozzles that gives 6.2L/min at pressure of 1.8
bar and specific gravity of 1.35, pump voltage 12.0V.
Randy Gordon Gilmore, where the only mechanical moving parts is the pump
itself. Then you might use a full cone nozzle and have the PCB and
nozzle stationary. But the question is will you gain a lot from this
method over conventional bubble etching ? I can't answer this question
because I haven't seen results from this method. It may be possible to
optimize your bubble etcher. e.g bigger air pump and larger bubbles.
> On Thu, 09 Jun 2005 10:48:43 +0200, Adam SeychellThat took a while to decide too. The web site lead me to the KYNAR
> <a_seychell@...> wrote:
>
>
>>For your nozzles, see http://www.spray.com Considering I'm in Australia
>>it only took two weeks to order three nozzles via their Australian
>>representative ( A$10/nozzle). I was surprised to learn that the spray
>>nozzle business is setup for selling small quantities. The factory had
>>to especially make my nozzles because they didn't have them in stock,
>>anywhere.
>>Adam
>
>
> What nozzles did you use, i was looking at their page and they have 2 or 3
> different ones ;-)
VeeJet series:
http://www.spray.com/catalogs/sg_EtchingRinsing.asp
I was able to find what type of nozzles typically used by spray etch
machinery manufactures. For fan type nozzles the fan angle is between
50° and 80°. I decided on 65° angle.
As for the nozzle size, I had to plot a graph showing pressure vs flow
rate for both the pump and nozzle. Where the two graphs intersect is
where the operating point is. After some shuffling around of figures , I
went for three "size 8" nozzles that gives 6.2L/min at pressure of 1.8
bar and specific gravity of 1.35, pump voltage 12.0V.
>nope. compact is not possible. As for simplicity I like the idea from
> I will not have time to build a sprayer any time soon, but reason i'm
> asking about it is that damn bubbler hose has apparently clogged up in the
> few weeks i wasn't using it. It was all nice and even at fist, but it is a
> nightmare again now.
>
> how would it be possible to make a compact sprayer?
>
Randy Gordon Gilmore, where the only mechanical moving parts is the pump
itself. Then you might use a full cone nozzle and have the PCB and
nozzle stationary. But the question is will you gain a lot from this
method over conventional bubble etching ? I can't answer this question
because I haven't seen results from this method. It may be possible to
optimize your bubble etcher. e.g bigger air pump and larger bubbles.