On Monday 05 May 2014 04:26:30 Steve Blackmore did opine: > On Sun, 4 May 2014 23:14:51 -0400, you wrote: > >Greetings all; > > > >Today, after fighting with it yesterday and putting in nearly 10 thou > >of x taper in 2.25" of Z travel before I got anywhere near a straight > >turn > > > > > >Ideas? > > Read this > > http://easyweb.easynet.co.uk/~chrish/cancelled%20account/tsetup.htm
This one is currently only bolted to its work surface via its front feet, a 3/4" thick slab of formica covered MDF, which in turn is sitting inside the "don't let a tool roll off" lip around the edge of heavy duty tool box, on casters, and sitting on a floor with a noticeable sway, low in the center of a 12x16 shed. The milling machine beside it, has nominally 2" extensions on its front legs to level it so crap doesn't jiggle off. There is about 600 lbs of other tools in the middle of the floor, like a Delta 6" jointer, and a tall Rikon bandsaw for resawing. > You should be able to remove the taper turning problem IF lathe is well > mounted on a rigid stand/base. Wooden benches/surfaces don't really > count as rigid unless steel covered with 1/4 plate or more. I suggested that a heavy steel bar, a 1x6 wide, nominally 24" long, to help stiffen it up, and was told its a never mind. By someone on this list about 2 coons ages ago. Whether I could find another at the scrap/recycle yard about 50 miles away, I haven't looked. As for added stiffness, I don't think a 1/4" plate would do anything but change the resonant frequency, probably down in pitch because its more mass than stiff at that thickness. (IMO) But its certainly better advice now, having lived with it, sitting on that mdf in 2 locations now and never getting a straight turn out of it. I have looked carefully at where the headstock is sitting on the bed, and can't see any evidence of debris holding it apart anyplace. But that only says I can't see it even if its there. Thanks Steve. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ 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
