On 26 Mar 2017, at 21:15, Ken Strauss wrote: > Yes but for small angles sin() and tan() are almost identical. Sin(7)=0.1219 > and tan(7)=0.1228
Yes; that's true. Is it not the half-angle anyway; so Tan 3.5 deg ? Or did I misinterpret the taper? Marcus > >> -----Original Message----- >> From: Marcus Bowman [mailto:marcus.bow...@visible.eclipse.co.uk] >> Sent: Sunday, March 26, 2017 3:53 PM >> To: Enhanced Machine Controller (EMC) >> Subject: Re: [Emc-users] Making taper lock hubs >> >> Is the tangent of the angle not more useful? That uses the straight length >> instead of the hypotenuse (along the tapered face). >> Opposite over adjacent, rather than opposite over hypotenuse. >> >> Marcus >> >> >> On 26 Mar 2017, at 19:48, Gene Heskett wrote: >> >>> Greetings everybody; >>> >>> As I read the machinists hand book, tapers such as this mean the >>> "included" angle, not the angle of just one side of a cone. >>> >>> So, I've read, where I don't recall, that a taper lock hub is 7 >>> degrees of taper. It doesn't self eject, but also does not need a lot >>> of jacking force to unlock it. Or is that magic angle different, not 7 > degrees? >>> >>> The sin(7)=0.121869343405147462, which I interpret as meaning if the >>> tool travels an inch, the diameter change is 0.121869343405147462. >>> >>> But the tool is moving only .735" from one end of the taper to the >>> other, so the additive value for the big end of the taper is then >>> .735*0.121869343405147462=0.0895739674027833847. Since that is better >>> than angstrom accuracy, round it down to 4 or 5 digits right of the >>> decimal makes sense since I'm not carving a new Hubble mirror here. >>> >>> So, bore is .876" (I overshot 7/8" a red one) and I'd like the taper >>> hub wall to be about 1/16" thick at the small end=1.0000". Then the >>> diameter at the flange, .735" to the left of that 1" point, would >>> 1.08957". >>> >>> Correct? >>> >>> Thanks. I might get this taper thing understood yet. >>> >>> 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 >> >> >> > ---------------------------------------------------------------------------- > -- >> 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 > > > > ------------------------------------------------------------------------------ > 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 ------------------------------------------------------------------------------ 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
