On Saturday 03 December 2016 02:11:17 dave wrote: > On 12/02/2016 05:47 PM, andy pugh wrote: > > On 2 December 2016 at 23:15, Gene Heskett <ghesk...@shentel.net> wrote: > >> And as you can see, looking at the top 2, one is dead centered over > >> a tooth, and the next one ccw from the top, is dead centered over a > >> valley between the teeth. > > > > I did that once. It's not right :-) > > > > You need quadrature, not halfassedture > > OK , so Unus, duo, tres, quattuor > does the duo morph to duorature? > I suppose there is some kind of hint in the quad ... as in recip of > 4??? It is way too easy to get sucked in.
In this case of watching gear teeth go by, divide the tooth space, which for this particular gear is pi*0.1, by 4, and use any ODD multiplier to get the spacing. So that base quadrature then=0.078539816339744831" Multiply by any odd integer to get a usable spacing. The center to center distance is obtained by the above math to rediculous accuracy. But the unknown is the width of the package, as that is not stated in the datasheets mechanical drawings. Which I find strange looking at footnote B which states that there is a grounded piece of the leadframe essentially flush with the side of the device, available on both sides. That folks, would be a quite precisely stamped out part, the width of which IS known to around .01mm and would determine the maximum width of the button. So why is that measurement left to us to make with our calipers? Its an apparently on purpose ommision. > > As Mark Twain so aptly put it: > "It ain't what you /don't know/ that gets you into trouble. It's what > you /know/ for sure that just ain't so." - > Sam also said that he never let his schooling interfere with his education. :) I've sat on that park bench facing the river in Hannibal Mo., beside his statue sitting there watching old man river go by. I aslo walked across that river, where it exits Lake Itaska. It was about 8 feet wide and 4" deep. Just deep enough to soak my socks, and colder than a bucket of ice cubes yet in mid June. I think I was about 6 yo at the time. > If you didn't fail occasionally you wouldn't appreciate success so > much. True, enough Dave, but the failures are spectacularly stupid ones, and thats embarrasing. > Hang in there. > > Dave 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
