On Monday 09 March 2020 22:55:55 Gene Heskett wrote: > On Monday 17 February 2020 18:08:11 Gene Heskett wrote: > > On Monday 17 February 2020 16:57:36 Les Newell wrote: > > > They should be any multiple of the tooth spacing plus half a tooth > > > spacing. > > > > > > Your tooth spacing (pi x diameter) / number of teeth = 0.314" > > > > > > So the available spacings between the sensor are: > > > > > > (0.314 x 0) + (0.314 / 2) = 0.157 > > > > > > (0.314 x 1) + (0.314 / 2) = 0.471 > > I have the final ATS667 in the process of glueing with as close to > .471" from left side to left side, should be as close as I'm going to > get it w/o actually making it movable. Now if the 5 pin plug doesn't > hit the head cover casting, (or vice versa) it should at least be > usable. Flat top cover, so I might get away with it. :) > That looks like it will work, almost. BUT I made a witness mark to space the index sensor out from the gear and directly over the path of the extra ferrous gizmo glued to the back face of the bull gear. oops, sees the gear too! Had to chisel it loose and have it glueing again about 1/8" farther from the gear. And I think I am going to have to demagnetize the gear which measures at about .001" max eccentricity, but is many times worse than that magnetically, Quadrature edge out of time failures are screwing with the tach. > Should be testable tomorrow. Cooking/curing under heat ATM. > > > > and so on... > > > > I think my existing bracket can do the latter spaceing, thanks Les. > > > > > You won't get a perfect quadrature but it should be good enough. > > > If I can get the gear demagnetized.
Thanks all. > > > Les > > > > > > On 17/02/2020 21:20, Gene Heskett wrote: > > > > Greetings all; > > > > > > > > Given that the bull gear in this lathe is exactly 6" in diameter > > > > at the outer face of the teeth; > > > > > > > > Given that it has 60 teeth; > > > > > > > > Given that the ATS-667's are mounted so as to clear the teeth by > > > > about 10 to 15 thou and they are slightly thicker than 5/32" > > > > inch. That would add about 3/16" to the radius of the arc they > > > > are mounted in, or 3/8" to the diameter; > > > > > > > > The mounting bracket currently has a slot per ATS-667 with > > > > around 1/16" of sideways motion per pocket; > > > > > > > > How far apart are they to be to output a good quadrature signal? 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis 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
