On 05/06/2014 08:22 AM, andy pugh wrote: > On 6 May 2014 15:57, Eric Keller <[email protected]> wrote: >>> I think the classical approach to machine design was to make the mounting >> to the base flat and provide for leveling. A lathe is a compliant >> structure, so a kinematic mount doesn't seem like it would be as effective >> as one might like > > Reading lathes.co.uk (and I have read all of it) seems to suggest that > the traditional approach was three bolts. Rivett just took it to > extremes. The Rivett bed is basically a solid rectangular bar. > (There is a central slot, but it is half an inch wide, and only about > 1/3 of the total bed length.) > > I think that my Chinese 9x (which, actually, might be an Indian > knock-off of a cheap Chinese lathe) has only two bolts, one at each > end. > > However, I have never noticed that it turned tapered, for all its other > faults. >
My Hardinge HNC and Feeler lathes have three point mounts, but the beds are designed to have enough rigidity on their own. I would tend to mount and align a cheap lathe bed to a steel tube, or concrete or stone block, then three point the mount. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ Is your legacy SCM system holding you back? Join Perforce May 7 to find out: • 3 signs your SCM is hindering your productivity • Requirements for releasing software faster • Expert tips and advice for migrating your SCM now http://p.sf.net/sfu/perforce _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
