For my little experience as insert for late and mill seller, some late for bearing work with cheramic + diamond insert and air flow as lubrificant .... these means more or less 20° araund tool, araund bearing in working order, plus in most cases machines equipped with oil coolers circulating around the spindle and slides ... so most of the lathe concerned is kept at a constant temperature ... so the hight precision is possible ... the most problem regards the real measure ... if is right the working bearing is kostant in measure, it is not so sure that the measure obtained is the desired one ... in fact, it is very difficult to measure the spherical bearing head ... beyond the only transfer from the working area to the measuring chamber changes the measurement itself. So you do not have to be amazed at the data you bring ... above all you have to remember that data is collected in the field and not in the measurement laboratories.
regards bkt 2017-07-04 20:39 GMT+02:00 EBo <e...@sandien.com>: > I had studied the design specs for a lathe which was certified <0.000002" > which used oil bearings instead of air, but from what I have seen 1um is > reasonably doable by mere mortals <https://www.youtube.com/watch > ?v=sFrVdoOhu1Q>, however back in the 90's there were only a handful of > people that could build, tune, and run a machine that would do 20x the > precision. And yes, you have to temperature and hudity control the work > (unless the structural members of the machine are made from something like > Sitall or Zerodur... > > > On Jul 4 2017 11:05 AM, Marius Liebenberg wrote: > >> There are lathes that do that already. The lathe is temperature >> controlled and the slides run on air bearings with a tolerance of >> better than 2 or 3 nano meters. The job is given in 10 micron steps >> and I have to work the gcode from there >> >> ------ Original Message ------ >> From: "Niemand Sonst" <nie...@web.de> >> To: emc-developers@lists.sourceforge.net >> Sent: 2017-07-04 18:01:54 >> Subject: Re: [Emc-developers] Finest resolution of Lcnc >> >> Gmoccapy is not the issue, as you can add more digits to the DRO on the >>> settings page. But if you speak about 0.1 µm it is useless to build a lathe >>> on that accuracy, as you will never be able to turn a part at that >>> accuracy. Just a few degrees temperature difference will destroy the >>> repeatability. >>> >>> Just calculate 1 Degree is 1 µm length difference on every 100 mm. >>> >>> Norbert >>> >>> Am 04.07.2017 um 17:15 schrieb Marius Liebenberg: >>> >>>> The DRO's will have to be modified a bit I suppose. In order to show >>>> the larger travels. The max travel is about 300mm. >>>> >>>> ------ Original Message ------ >>>> From: "andy pugh" <bodge...@gmail.com> >>>> To: "Marius Liebenberg" <mar...@mastercut.co.za>; "EMC developers" < >>>> emc-developers@lists.sourceforge.net> >>>> Sent: 2017-07-04 13:59:32 >>>> Subject: Re: [Emc-developers] Finest resolution of Lcnc >>>> >>>> On 4 July 2017 at 12:10, Marius Liebenberg <mar...@mastercut.co.za> >>>>> wrote: >>>>> >>>>> The question I have is - will I be able to control the lathe to say >>>>>> 0.1 >>>>>> micro meter with Lcnc using the Gmoccapy front end. >>>>>> >>>>> >>>>> You could easily configure the machine to use microns as the base unit >>>>> (then G20 would work in thousandths of an inch). >>>>> >>>>> >>>>> -- atp >>>>> "A motorcycle is a bicycle with a pandemonium attachment and is >>>>> designed for the especial use of mechanical geniuses, daredevils and >>>>> lunatics." >>>>> — George Fitch, Atlanta Constitution Newspaper, 1916 >>>>> >>>> >>>> --- >>>> This email has been checked for viruses by Avast antivirus software. >>>> https://www.avast.com/antivirus >>>> ------------------------------------------------------------ >>>> ------------------ >>>> Check out the vibrant tech community on one of the world's most >>>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >>>> _______________________________________________ >>>> Emc-developers mailing list >>>> Emc-developers@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/emc-developers >>>> >>> >>> >>> >>> ------------------------------------------------------------ >>> ------------------ >>> Check out the vibrant tech community on one of the world's most >>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >>> _______________________________________________ >>> Emc-developers mailing list >>> Emc-developers@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/emc-developers >>> >> >> ------------------------------------------------------------ >> ------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> Emc-developers mailing list >> Emc-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-developers >> > > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
