> On 16 Feb 2019, at 12:46 pm, Gene Heskett <ghesk...@shentel.net> wrote: > > On Wednesday 13 February 2019 05:41:38 Gene Heskett wrote: > >> On Wednesday 13 February 2019 03:46:53 Les Newell wrote: >>> I recently made a couple of coolant units based on eBay mister heads >>> like this one >>> <https://www.ebay.com/itm/Mist-Coolant-Lubrication-System-Spray-for- >>> 8m m-Air-Pipe-CNC-Lathe-Milling-Machine/172271983174?>. These ones >>> with the straight end on the nozzle seem to be better quality than >>> the ones with a nozzle that just tapers down to a blunt point. The >>> problem with all of these eBay misters is that they generate a fine >>> mist, which gets everywhere. I made some modifications on mine to >>> work around the problem. The air jet in the model I linked above is >>> just over 2mm diameter. I extended the oil jet using 2mm stainless >>> tube so it now sticks out about 1.5" past the end of the brass >>> nozzle. This leaves a thin annular gap for the air to get out. As >>> the area of the air jet is now very small you can run quite high >>> pressure (60 - 100 psi) with very low flow. By the time the air >>> reaches the end of the oil jet it has slowed down a lot and no >>> longer has the energy to break the oil into a fine mist. You end up >>> with a column of air carrying a stream of droplets in the middle. On >>> alu oil consumption is minimal. I use a neat cutting oil and my >>> previous tank was the filter bowl on an air regulator. That was >>> enough for several days of machining. >>> >>> One down side of this setup is that it won't suck the coolant up >>> from the tank. I used a filter canister as my reservoir. Shop air is >>> supplied at full pressure to the nozzle through a solenoid valve. >>> There is a tee in the line which feeds a regulator to drop the >>> pressure to ~10 psi for the reservoir. Theoretically those filter >>> canisters can take 100psi but that sort of pressure in a plastic >>> tank scares me. >>> >>> By the way Gene, if you are buying a solenoid valve from eBay, get >>> an Airtac valve. They are available in a wide range of voltages and >>> configurations. They are reasonably well made and can handle 100% >>> duty cycle. >>> >>> Les >> > I found a 12 volt 1/4" version, but what the heck is > Operating pressure 0.15~0.8MPa supposed to tell me??? Need a translation > from chinglish please. I haven't a clue what the heck 0.8MPa means. >
<https://www.google.com.au/search?q=mpa+to+psi&rlz=1C5CHFA_enAU729AU729&oq=mpa+to+psi&aqs=chrome..69i57.3701j0j9&sourceid=chrome&ie=UTF-8> > >> So I probably bought the wrong one. Expertise comes from the >> experience of doing it wrong. :) >> >>> On 13/02/2019 01:31, Phillip Carter wrote: >>>> I use a water filter canister similar to this: >>>> https://www.cnczone.com/forums/uncategorised-metalworking-machines >>>> /1 02934-built-fog-less-coolant-mister.html >>>> <https://www.cnczone.com/forums/uncategorised-metalworking-machine >>>> s/ 102934-built-fog-less-coolant-mister.html> >>>> >>>> Cheers, Phill >> >> Cheers, Gene Heskett > > > 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> > > > > _______________________________________________ > 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 https://lists.sourceforge.net/lists/listinfo/emc-users
