On Saturday 13 October 2018 16:10:16 andy pugh wrote: > On Sat, 13 Oct 2018 at 15:03, theman whosoldtheworld > > <[email protected]> wrote: > > I think for your pourpose the better idea was using a very precise > > LVDT and put the measure of your axis in a table for make a good > > backslash linearization kinematics file .... > > Or use a dial indicator and a notebook.
And a long, perfectly straight rod, turning slowly enough not to beat the $100+ dial to bits, and try to get an average reading. I'd need a 34" rod, a dog to turn it and an MT5 dead center, none of which I have. And from my experiments this afternoon, I am going to have to find a single spot beam green laser, this red line pistol cartridge model isn't going to give me good data, ever with its rotating - pattern beam. I've put a layer of cloudy poly on the cds and it helps, but it all goes to hell the instant the knife on the toolpost starts to interrupt the beam since the beam isn't round, and there does not seem to be a null at exactly half the beam blocked. I changed the drive belt to get more spindle revs, but at 1200 revs the front bearing is smoking in about 6 or 7 minutes with the bolts loose. And the reading still wanders around since the spindle is not synchronized with the meters A/D. So I've got to find a different way. I was hoping I wouldn't have to putz with building a camera, but that might yet be the only way. I'm getting my cataracts fixed starting next week, so this project is on hold for the time being. Many many thanks for all the help and ideas I've been offered, even if my explanations lacked clarity, its appreciated, a lot. -- 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> _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
