> -----Original Message----- > From: Gene Heskett [mailto:ghesk...@shentel.net] > Sent: Friday, March 22, 2019 12:14 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] mister nozzle shape > > And I've been cogitating on how to restrict the fluid flow, so haven't > made any chips yet. Lack of the ability to bore very fine threads below > nominally 10mm discourages me from attempting a needle valve design in > some 1/2" thick brass bar I have is driving me toward a pinch the hose > idea since the hose is so small anyway, I'm thinking of drilling and > tapping into the motor mount, a couple 3mm.7 tapped holes 8mm or so > apart, and making a flat piece with matching clearance holes, clamping > that teeny hose between them and drawing it down with hex head cap > screws to pinch it down to a red hair. Pressurizing the coke bottle > takes care of priming the system and I can drill into the mount body to > get that air easily enough. It will bleed back out of the bottle, and I > can extend the inner nozzle to deliver what liquid does get thru the > pinched section to roughly the middle of the annular air running at > maybe 10 psi. > > That way any particulates that get thru the sintered bronze filter on the > end of the feed line in the coke bottle will hopefully not be so coarse > as to block off the pinched area, AND theres nothing to corrode over > time. Might have a cold flow problem with the hose, requiring a pinch > adjustment occasionally, but thats to be fiddled with when its > encountered. > > Anybody see any showstoppers?? >
Is there some reason not to use a commercial pneumatic needle valve? Perhaps not the best price nor quality but something like: https://www.amazon.com/Clippard-PQ-FV04-Plastic-Control-Tubing/dp/B01A63TGA0/ or https://www.amazon.com/Pneumatic-Connect-Fitting-Control-Degree/dp/B07L9ZGRTS/ They are available for various tubing sizes and NPT sizes. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
