What you are making is very much like an artist's air brush, the kind used for very small and detailed work. The amount of air thy use is tiny. Some are controlled with a foot switch and others with a mechanical button on the "brush"
The amount of air used is so tiny you can just let the air run and your big compressor would cycle every 30 minutes. So you might control the coolant flow, not the air and use a much cheaper valve Actually one project I've been wanting to make is a computer controlled valve. In theory that are very simple but in practice they requires some very accurate work on a lathe. Drill two parallel holes in your favorite kind of metal. both dead end. call one input and one output. No air flows because you still need to drill (and ream and lap) a 3rd hole that intersects and connects the first 2. Drill that hole. Then place some drill rod in the hole. There are better designs that involve machining the rod so the forces are in balance then you only need a tiny force to move the rod. On Tue, Feb 12, 2019 at 11:16 AM Gene Heskett <[email protected]> wrote: > On Tuesday 12 February 2019 12:45:22 Les Newell wrote: > > > You'd probably be better off with something like this: > > <https://www.ebay.com/itm/CAMPBELL-HAUSFELD-1-Gal-Air-Compressor-110-P > >SI-Max-Pressure-Portable-Lightweight/283371934304> > > > > Les > > > I've thought of that too Les, since I have a 125lb 8 gallon version of > that noisy thing under the workbench about 8 or 9 feet of hose away, and > pressure regulating stuffs too. But I don't have a solenoid valve to > shut it off. Lemme see if I can find a valve on fleabay. Yup, $16 for a > 1/4" air horn valve rated at 200 psi, with a 12 volt coil. Fittings? > Wait & see. Probably more current than a 7i76 can handle, but I've a > drawer full of 12 volt power relays, 4pdt. And psu's up to 5 amps. > Should be able to cobble something up for the longer haul. The question > then is how long can it stand to be activated before the coil burns up. > Air horns aren't exactly 100% duty cycle. Might have to setup a instant > slam it open, and a resistively limited holding current. We'll see. > Thanks Les for the elbow in the ribs, sometimes I need that nudge in a > different direction. Or I've an empty 20 lb freon tank, for about a 10% > on time. Using it to smooth the surges, That would cool the coil. > > Lots of ways to skin this cat. :-) > > > On 12/02/2019 09:50, Gene Heskett wrote: > > > Greetings all; > > > > > > I took a small air pump out of a failed solder rework unit last > > > afternoon, find it to be some sort of a vibrator tuned to 60 hz, > > > with a small diaphram on both sides of the solenoid. So this > > > doesn't seem like enough air to drive a mister. > > > > > > Looking at fleabay, I find, for about $12, what looks like a > > > centrifigal 12 volt blower, rated at 380L a minute for blowing up > > > air mattresses etc. Rated pressure is 3800pa, but that doesn't > > > readily translate into how much or how well it would blow, and make > > > a mist for cooling a 4mm tool for working alu sheet? Like: > > > > > > <https://www.ebay.com/itm/Air-Compressor-Portable-Electric-Pump-Infl > > >ator-Nozzles-Car-110V-AC-12V-DC-SM/292708939526?hash=item4426cff706:g > > >:UMgAAOSwq4dbiLuc:rk:37:pf:0> > > > > > > Would it move enough air to run a mister? > > > > > > I get the impression its a relatively short operating life, so one > > > should buy 2 of them to have a spare... > > > > > > Or should I be looking at the air brush stuffs in the $50 range? > > > Like: > > > > > > <https://www.ebay.com/itm/Portable-Airbrush-Set-Small-Spray-Pump-Pen > > >-Set-Air-Compressor-Kit-for-Art-X8G1/123329956995?hash=item1cb709cc83 > > >&enc=AQADAAADAFjVrDbVsZ8oH%2F8PNHtt9VX4%2Fw7FZcmMuqsX8uaFEduVOXpjqQen > > >9rLDcD5TvbQttKkdSD%2BSsAxk0yuccLjjF%2BRz9pDLWoozX8ncpjPQuyNb7XZfPGHT% > > >2BHvk1sXmvoGgcfLMHWUH5%2BV5JV3xr4QkdEaHhbfow6NWXTbC7hhCEPKZ307jBsUJ7a > > >3aclRgfNpUIkgaClk%2Bvi9oRc1BjI9ZpWnjNx2mhm6fKL6ofR20Z03ylcA2DZoYucsJ7 > > >1zglgKiPnRhcBydyEouoH%2BDyRpU%2BuPqinq8t6By5arBXLrRNNMSrG4Vw%2B0Kv40X > > >37DGRv%2BRzFrjOln6T8UAxFIeg%2BCj0F2XcUqmv94mOIOdLbcdYT32Frf%2FDjlLmRb > > >%2Bclw24TrmALp5MwQm%2FEwkzojcoz6Ln%2FYzQz%2BAN%2FWeFOZpoAaOikEh7eCdAl > > >4skAoEs2R4iSJNIZu4Af6sVgDfoY%2B7xEWEGOJ2PSU3KqodU3hMFXUUzn6cxvMyVLVbR > > >Bmk%2FmKcS4IYlmE5vWpAxeNQfRxt1kBvdIyfMtVh8vviZXQInHEkbq83%2BXeeFtyi1I > > >gY3YpuWg%2FBRhQM%2FOfTKI%2BdthTTZAOSWg1N0NSQlg2I7ZZKfLKXbOBZR0R79sH6n > > >gXfHPBIZ1%2BKV%2FvLwXqASPZRYqK21HHlaZU7ZEUAMXLUay516TGxumD1sZaWX0qgwv > > >K6MqqYjM3%2BmWGOD%2B1daZ5uGy%2FyfNx4RuSPRsmSdY1D3sMX1GTnYf3ilPQoV3%2F > > >RofK0T2KR9tnqQw6qpiVC0f > > > > PPYjqpPYlp > > > > > > > > BvZYhRwsoub%2BjjuSvSpoe0mipxXT5JrHYIInmu%2Bu4T3UDKpwrtTPbNjn8CyHh7uh > > >5xs%2FS6sp9TW9%2FwE47Nw02qQZ6LBKybtyy9pkqY5EN5rLiH3lk4ZR6uM5IHM%2BlTt > > >QPWG0bvLOnrrfzurlXoUYbAzfwBUT6HhSjKcrDNbCqCepe8U25TBYGlAv%2FN4xCaHRyt > > >Rl7QkQUBgZor4Qgt6ktu8AYPDlqM5Z8XwLGmSI1hS3rg%3D%3D&checksum=123329956 > > >995a186a265037243a594404d2410767ccf> > > > > > > Its obvious I'll need some sort of cooling. > > > > > > Cheers, Gene Heskett > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
