On Friday 16 February 2018 00:32:32 Chris Albertson wrote: > I ordered a sampling of the sensors from Chinese vendors on eBay. (At > $1.90 each, ordering a handful don't break the bank) I measured the > treads and 1mm pitch seems to be the standard. I looked and found it > is a metric standard but not very common. I found a very low M12x1 > cost plug tap. > > I can print 1mm pitch threads but they don't come out very clean or > sharp. The tap cleans them up really well. > > Actually it makes doing mental math easy. I measure the taget to > senior distance and if I want to move it say 0.25mm it is pretty easy > to figure out I need to rotate the sensor 90 degrees. > > I think this thread size os used for those very thin rings used for > electrical jacks and toggle switches. The ring nuts are only 2mm > thick so they need an ultra fine pitch. > > With the sensor in a threaded holder I can screw it in until it makes > contact with the target then back it off until the signal goes low > then screw it back until it goes high. It is self measuring at 1mm > per turn.
That does certainly simplify the setup. Similar to my useing 50 tpi to make the plugs that bind the loose, not even a mount flange, nuts in the xy axis's of my small HF micromill. Somewhat difficult to get to because I have a limit switch to detect when its about to unscrew itself off the screw, and that precludes dropping a pin drive wrench over the screw to adjust the nuts. 50 tpi? Seemed like a good deal at the time. If I had to do it over I think I'd use 80 tpi as it would have given me a little more room. > On Thu, Feb 15, 2018 at 8:11 PM, Gene Heskett <ghesk...@shentel.net> wrote: > > On Thursday 15 February 2018 22:23:34 Chris Albertson wrote: > > > I'm slowing getting set up to test one of those sensors. I just > > > 3d printed a holder. The darn thing uses M12x1 threads so I had > > > to order a 12x1 tap 6 weeks from China and the tap arrived. > > > > 12mmx1mm?. Thats pretty fine, way finer than a 1/2 SAE. And close to > > being made of un-obtainium I'd expect. > > > > > Printing > > > 12x1 almost works but you need to chase out the printed threads. > > > > > > None of the local stores carry anything that is M12x1. Soon > > > enough I will know if it can "see" things like hex bolt heads and > > > aluminum foil. > > > > > > On Tue, Feb 13, 2018 at 5:04 PM, jeremy youngs > > > <jcyoung...@gmail.com> > > > > wrote: > > > > I had to service this motor today, as a previous technician had > > > > improperly installed the brushes and it would are off at speed. > > > > In doing so I removed the tach cover and found plenty of room > > > > for an omron encoder. So I will not likely try these for spindle > > > > encoder. But will be putting them in as home switches soon. > > > > > > > > Gene, you are absolutely right about the optos, the strongest > > > > and best these have performed today after I replaced the bob to > > > > a straight through board. However, I discovered my y axis > > > > ballscrews is bent. It's been in there 4 years now and was kinda > > > > jury rigged anyhow. So I guess it's time to jump that hurdle, > > > > may as well put one in x as well. > > > > Now where's that box with pulleys and belt in it from China that > > > > has been setting in Chicago for 2.5 weeks....... > > > > ------------------------------------------------------------ > > > > ------------------ > > > > Check out the vibrant tech community on one of the world's most > > > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > > > _______________________________________________ > > > > 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> > > > > ------------------------------------------------------------ > > ------------------ > > Check out the vibrant tech community on one of the world's most > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > _______________________________________________ > > 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> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
