On Wed, 07 May 2014 00:25:57 -0600, you wrote: >On 5/6/2014 7:45 AM, andy pugh wrote: >> On 5 May 2014 23:49, Steve Blackmore <st...@pilotltd.net> wrote: >>> MDF and just two bolts - no wonder it turns tapered :) Needs to be >>> bolted down to something rigid enough to enable you to pull the twist >>> out of the bed. >> >> This does, of course, go against all the standard tenets of lathe >> design. Not unexpected for machines not manufactured with any >> consideration of lathe design, perhaps. >> >> My Rivett sits on two inset ball-bearings at the headstock end and a >> spherical washer at the tailstock end specifically to ensure that the >> support stand could have no influence on the shape of the bed. >> >> In the case of Gene's lathe it seems quite possible that the head >> simply isn't straight on the bed. It would be interesting to put a >> long bar in the chuck and see if it is possible to move the headstock >> about. > >On both of my 7x lathes I could put a piece in a chuck, setup an >indicator on it then put some firm hand pressure on the headstock and >see deflection on the indicator.
You can do that with a Bridgeport mill ! Steve Blackmore -- ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
