OK Thanks Todd.
Dave On 6/29/2016 10:37 AM, Todd Zuercher wrote: > Directly from Hiwin, through their website. (I think the thing shipped from > Chicago). > > I can't remember who all I may have gotten prices from (it was 5 or 6 years > ago), but one of the main reasons I went with Hiwin was their online ordering > was pretty simple (and I think they were one of the cheapest quotes). A few > e-mails, a couple of phone calls and exchanging a couple of drawings of > specs, and it was done. > http://www.hiwin.com/ballscrews.html > > I remember now I did have one problem, the first nut that came with the screw > had no means of lubricating it. There was no hole or anything drilled for a > grease zerk. A quick call to them and they sent me a new one. Getting that > thing started on the screw without loosing any balls was a real chore, ended > up chucking the mandrel they sent with it and using something that fit a > little tighter was the trick to make it work. > > ----- Original Message ----- > From: "Dave Cole" <[email protected]> > To: [email protected] > Sent: Wednesday, June 29, 2016 10:04:13 AM > Subject: Re: [Emc-users] Screw compensation file - LinuxCNC 2.6 > > How did you buy the screw? Via Hiwin directly or through a distributor ?? > > I think you are near Cleveland ? > > Did you get a price from Nook as well ?? Nook is right in Cleveland > on 49th street. > > Dave > > > On 6/29/2016 8:35 AM, Todd Zuercher wrote: >> I don't know how much use it is to you, but I bought a custom ball screw >> (cut to length and ends machined to my specs) from Hiwin, for significantly >> less (about half) of what the cost of buying an OE lead screw (not ball >> screw) from the manufacturer of one of our machines. It works better and >> has lasted more than twice as long as the original lead screws (which used >> to last only about 2 years). >> >> ----- Original Message ----- >> From: "Dave Cole" <[email protected]> >> To: "Enhanced Machine Controller (EMC)" <[email protected]> >> Sent: Tuesday, June 28, 2016 4:42:00 PM >> Subject: Re: [Emc-users] Screw compensation file - LinuxCNC 2.6 >> >> I thought about that except that the data file is setup via the same >> method as the Y axis. >> >> However the X axis screw is much worse than the Y axis. >> >> I went over the file with the guy who did the measuring, and he agreed >> that the data seems like it is in the proper order. >> >> Its weird that the Y axis is working really well, while the X axis is >> not working well at all. I have a small X-Y machine in my office that I >> may setup with a dial indicator and do some testing just so I can better >> understand the screw comp. >> >> I did some looking and Nook, a big ball screw maker in the US says that >> their rolled ball screws, which are not normally used for machine tools >> are accurate to +/- .004 per foot. In the first foot of this X axis >> screw, the screw is out 0.030 of an inch. >> >> Nook's ground ball screws, standard accuracy are good to +/- 0.001 per >> foot. >> >> So I wonder if I have reached the limit of LinuxCNCs ability to >> compensate for a junk screw? >> >> Dave >> >> On 6/28/2016 11:56 AM, andy pugh wrote: >>> On 28 June 2016 at 15:35, Dave Cole <[email protected]> wrote: >>> >>>> LinuxCNC is trying to use the x axis data since ball bar testing >>>> results change significantly if the X axis screw comp is enabled or >>>> disabled. However the screw comp is not effectively correcting the >>>> screw. >>> Is it possible that the compensation file is upside down? >>> >> ------------------------------------------------------------------------------ >> Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San >> Francisco, CA to explore cutting-edge tech and listen to tech luminaries >> present their vision of the future. This family event has something for >> everyone, including kids. Get more information and register today. >> http://sdm.link/attshape >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> ------------------------------------------------------------------------------ >> Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San >> Francisco, CA to explore cutting-edge tech and listen to tech luminaries >> present their vision of the future. This family event has something for >> everyone, including kids. Get more information and register today. >> http://sdm.link/attshape >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ > Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San > Francisco, CA to explore cutting-edge tech and listen to tech luminaries > present their vision of the future. This family event has something for > everyone, including kids. Get more information and register today. > http://sdm.link/attshape > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ > Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San > Francisco, CA to explore cutting-edge tech and listen to tech luminaries > present their vision of the future. This family event has something for > everyone, including kids. Get more information and register today. > http://sdm.link/attshape > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
