FWIW, here are models of the No Mister Misty:

https://bgp.nu/~tom/pub/NoMisterMisty-Assy.f3d. (Fusion 360 Assembly)
https://bgp.nu/~tom/pub/NoMisterMisty-Assy.zip (Solid Works Assembly)
https://bgp.nu/~tom/pub/NoMisterMisty-Assy.step (.stp or step file)

-Tom



> On Mar 21, 2019, at 2:11 PM, Gene Heskett <ghesk...@shentel.net> wrote:
> 
> On Thursday 21 March 2019 11:09:39 Tom Easterday wrote:
> 
>> We built “No Mister Misty” for a bunch of machines around our shop and
>> they work great.  Traditional misters force coolant/lubricant under
>> pressure out the end of a nozzle which atomizes the coolant.  Most of
>> that goes into the air and after time your shop will be filled with a
>> mist of coolant for you to inhale.  Our (not) mister uses a needle
>> valve from McMaster that is epoxied into a machined brass block and
>> allows you feed coolant through the valve which is then injected into
>> the side of a stream of low pressure air, both coolant and air stream
>> are at the same pressure.  There is then a tube 4-6” long with a small
>> (flat faced) nozzle on the end with a 0.040” hole in it  That way the
>> drops of lubricant are NOT atomized, but are carried out in tiny
>> droplets in the air stream.  The vast majority ends up where you aim
>> the nozzle and not in the air.  You can regulate the amount of coolant
>> quite precisely with the needle valve.  They create very little mist.
>> 
>> -Tom
> Well, now having attempted to take it apart and inspect the needle valve, 
> it turns out that the valve actually regulates the air flow but to a 
> very minor degree as it has four more nominally #69 holes bypassing the 
> needle seat even when its closed.
> 
> It also turns out that the fluid hose simply sails on by the mounting 
> block as a continuous hose all the way from the tank to the nozzle, 
> which is threaded on its OD so that the rear brass part screws on and 
> off the end of the leaky plastic, which in turn controls the spacing of 
> the jet and the adjustable end brass nozzle and that maximum suction 
> lift is achieved when the internal/rear brass part connected is loosened 
> at the gland, and it can then be reassembled one or perhaps two threads 
> farther out, bringing the end of the nozzle approximately flush with the 
> end of the outer brass fitting, and it  then develops enough suction to 
> prime the suction line and make spray at about 20 psig, which once 
> started, still works down to about 13 psig. But even then,the segmented 
> air hose is leaking enough to blow out all all 85 candles on my next 
> birthday cake.  Is this stuff all that poorly molded?
> 
> The real bottom line is that in addition to putting balanced 
> pressure /in/ the fluid container, there is not _any_ facility to 
> control the fluid flow in the whole thing.  So after I check the mailbox 
> as I just heard the teeny white box truck go by, I'll go see if I can 
> find a needle valve to put in the fluid line an inch or so from the 
> mounting block else it will use up an 8 oz coke bottle of mix in about 2 
> minutes, drowning the work and soaking the spoil board. It might even be 
> something I'll have to make, and while needles are hard to make, I do 
> have drills down to #80.  And I know how to do primitive EDM, which 
> makes me think I might be able to do the needle and its seating orifice 
> in one shot.
> 
> This is turning into one of the higher numbered Excedrin headaches.
> 
> But I'd  better get to it...
>> 
>> On Mar 21, 2019, at 8:36 AM, Ken Strauss <ken.stra...@gmail.com> wrote:
>>>> -----Original Message-----
>>>> From: TJoseph Powderly [mailto:tjt...@gmail.com]
>>>> Sent: Thursday, March 21, 2019 7:32 AM
>>>> To: Enhanced Machine Controller (EMC)
>>>> Subject: Re: [Emc-users] mister nozzle shape
>>>> 
>>>> a quick google reminded me why this was familair
>>>> try googling 'spray nozzle'
>>>> i got
>>>> https://en.wikipedia.org/wiki/Spray_nozzle
>>>> and it showed me that the flat surface exit made NO atomization
>>>> thats not what you want, sorry
>>>> ( i was trying to achieve the jumping water effect seen in many
>>>> fountains and that flat exit was great for the hot dog of water
>>>> effect ) if you want the fluid stream broken into tiny droplets ,
>>>> the web page lists a lot of geometries to try
>>>> tomp
>>>> 
>>>> On Thu, Mar 21, 2019 at 10:50 AM Gene Heskett
>>>> <ghesk...@shentel.net>
>>>> 
>>>> wrote:
>>>>>> On Wednesday 20 March 2019 21:29:19 TJoseph Powderly wrote:
>>>>>> 
>>>>>> Hello Mr Nozzle shape
>>>>> 
>>>>> Did not get any useable hits on this side of the pond. URL?
>>>>> 
>>>>> Cheers, Gene Heskett
>>> 
>>> Thanks for the link. Sometimes Googling for the obvious terms gives
>>> the best results!
>>> 
>>> 
>>> 
>>> 
>>> _______________________________________________
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>>> Emc-users@lists.sourceforge.net
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>> 
>> _______________________________________________
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> 
> 
> Cheers, Gene Heskett
> -- 
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page <http://geneslinuxbox.net:6309/gene 
> <http://geneslinuxbox.net:6309/gene>>
> 
> 
> 
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