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! >>> >>> >>> >>> >>> _______________________________________________ >>> Emc-users mailing list >>> Emc-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> >> https://lists.sourceforge.net/lists/listinfo/emc-users >> <https://lists.sourceforge.net/lists/listinfo/emc-users> > > > 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>> > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/emc-users > <https://lists.sourceforge.net/lists/listinfo/emc-users> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
