On Friday 15 February 2019 20:54:26 Phillip Carter wrote: > > 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-fo > >>>r- 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_enAU729AU72 >9&oq=mpa+to+psi&aqs=chrome..69i57.3701j0j9&sourceid=chrome&ie=UTF-8> > 0.8MPa=116.03016 psi. I think it will work.
Tanks Phil > >> 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-machine > >>>>s /1 02934-built-fog-less-coolant-mister.html > >>>> <https://www.cnczone.com/forums/uncategorised-metalworking-machin > >>>>e 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 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
