Re: Lathes for retrofit

James,

I'm talking about 9x20 size machines; in this case the Bv20 series,
which is distinguished from the "typical" 9x20 by its gear driven
spindle, and lack of a Quick change gear box and carriage feed by
worm drive on the leadscrew.

Hope this helps,

Ballendo

P.S. One strong advantage of the typical 9x20 not yet mentioned is
that you can get one at HF for about 550 bucks... (so it may be worth
removing the "extras" to make a CNC lathe)


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "James Cullins"
<jcullins@c...> wrote:

> Are you talking about the CQ6120X320
> LATHEMASTER 8 X 14 MINI ?
> Jim
> ----- Original Message -----
> From: "ballendo" <ballendo@y...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Thursday, October 30, 2003 7:26 AM
> Subject: [CAD_CAM_EDM_DRO] Lathes for retrofit
>
>
> > David,
> >
> > Snips, inserts below:
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "David A. Frantz"
> > <wizard@e...> wrote:
> > >As far as actual conversion what advantages foes the Lathemaster
> > >lathe provide over the others? It does seem to be difficult to
> > >get comments form people concerning the Lathemaster lathe. The
> > >are always plenty of comments on how to get the HF and Grizzley
> > >lathes running but very little on the Lathemaster.
> >
> > The chief advantage of the lathemaster for CNC is what I

mentioned;

> > there is less stuff to remove and/or work around to complete the
> > conversion. The reason there is not much about it on my 9x20Lathe
> > group is that for manual use, the "std" 9x20's are far superior,
> > except for a steel only shop where the lower speed at teh bottom

end

> > is appreciated. Less so with modern tooling...
> >
> > Which brings me to the next consideration for a CNC conversion,

the

> > drive train of a CNC lathe is likely going to be an upgrade to a

VFD.

> > A lathemaster has spindle gears which may allow for more

flexibility

> > when using a cheap VFD setup (I'm not a fan of cheap Import gear
> > trains, so I'd just drive it direct.) But again , the Lathemaster

has

> > less "junk" in the way to remove(Can we just call it a Bv20 style?
> > The "lathemaster" is just a popular version OF the Bv20.)
> >
> >
> > >It is interesting your comments on the manual aspects of the
> > >Grizzley, HF and similar lathes. That is all well and good

but if

> > >you really want flexibility, even for manual operations, the
> > >rational thing to do would be to motorize those axis. Hardinge
> > >has been doing this for just about forever on their tool room
> > >lathes, unfortunately not direct drive but very flexible none the
> > >less.
> >
> > You're preaching to the choir here<G> My 9x20Lathe group is the
> > opposite of here; nearly entirely manual users, so we tend to stay
> > OFF the subject of CNC, the same way here we stay OFF the subject

of

> > manual machining... (Personally, I like and use both manual and

CNC,

> > but not on the same machine! I still think preserving the

handwheels

> > on a CNC retrofit is a poor choice.)
> >
> > > Thanks
> > > Dave
> >
> > You're welcome.
> >
> > Ballendo
> >
> >
> >
> >
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