On Mon, 2013-03-04 at 20:53 -0600, sam sokolik wrote: > The mazak at galesburg fest did spindle orient using the vfd and > encoder. It was a bit 'loose' because of the gear box play. It worked > ok as far as I could tell. (maybe a bit slow) > > You can see it here. > https://www.youtube.com/watch?v=vNn-Yr7it5s > > Here is a bit better implementation of vfd orient. > https://www.youtube.com/watch?v=D6dGYsXAPIU > > The k&t has a mechanical orient - the spindle has to be in a certain > gear - then a hydraulic dog is engaged and the spindle is creeped until > it is hits the stop. Much easier ;) > http://youtu.be/Kh4YD0d071c > > sam > > > > On 03/04/2013 07:55 PM, TJoseph Powderly wrote: > > On 03/04/2013 09:11 AM, dave wrote: > >> On Mon, 2013-03-04 at 10:09 +0000, andy pugh wrote: > >>> On 4 March 2013 07:38, Kirk Wallace <kwall...@wallacecompany.com> wrote: > >>> > >>>> The dog keys are not installed on the end of the spindle, though there > >>>> are slots and threaded holes. With a modern VFD on the spindle, it might > >>>> be easy enough to install the tool with a slight up pressure and rotate > >>>> the spindle until the the tool engages the keys and seats, but he keys > >>>> would interfere with the gripper as is is now. So far, the tools seat > >>>> well enough without using the keys. > >>> It is probably possible to carefully align the spindle for tool-change > >>> if there is a spindle encoder. > >>> > >>> Wikipedia is quite clear on this point, and it matches my understanding: > >>> "This is a "self releasing" or "Fast" taper. Unlike the more acute > >>> self holding tapers above, such tapers are not designed to transmit > >>> torque. This turning effort is carried by driving keys engaging slots > >>> on the flange." > >>> > >>> However I have trouble seeing how you can hold a CAT flange and still > >>> allow the dogs to engage. BT flanges have a gripper groove which is > >>> far enough below the keys for there to be no interference. ( > >>> http://www.bright-tools.com/news_show_79.html) > >>> There is rather less space on the SK flange. ( > >>> http://www.morari.it/home/en/products/adjustable-heads/cone-std-din-69871 > >>> ) so I don't know how those avoid gripper-to-key clashes. > >>> > >> The mazak v5 does it all the time. Semi-circular ring with a spring > >> driven pin to go in the groove. Rotate in, come up, clamp the tool > >> holder, move down, rotate, come up, go down and to rest position. > >> The mazak also has a mechanism for dog alignment; on some it is > >> mechanical on other sensor or encoder driven. > >> > >> Sorry I don't have pictures. Maybe tomp has a picture from his fine > >> collection re' Galesburg. > >> > >> HTH > >> > >> Dave > >> > >> > >> > >> ------------------------------------------------------------------------------ > >> Everyone hates slow websites. So do we. > >> Make your web apps faster with AppDynamics > >> Download AppDynamics Lite for free today: > >> http://p.sf.net/sfu/appdyn_d2d_feb > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > > Dave, > > > > Hi, thanks for thinking of me, > > All my computers from those days are dead > > But > > Fenn did a great job of documenting during that early fest at Roland's. > > His collection can be seen here > > http://wiki.linuxcnc.org/cgi-bin/wiki.pl?MazakRetro > > > > I went back once later to work by myself, but have no pics now. > > I sent some to Matt and Ray regarding a sensor for tool change. > > > > Hope you are all recuperated! Spring time is comin! > > > > regards > > TomP > > tjtr33 Hi, Sam, Yes, it was dog slow compared to the mechanical but it worked and was adjustable.
Dave > > > > ------------------------------------------------------------------------------ > > Everyone hates slow websites. So do we. > > Make your web apps faster with AppDynamics > > Download AppDynamics Lite for free today: > > http://p.sf.net/sfu/appdyn_d2d_feb > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_d2d_feb > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
