Re: Cam program and post needed for a cnc propellor carving lathe

Larry,

With an added A axis you could machine both sides on a router.

How long are the blades?

One thing to consider is flex of a blade only being supported on the
ends. If the blade was fully supported on at least one side for part
of the maching it might help.

I've seen duplicating lathes that use a large circular cutter for
shaping ships blocks ca 1700s, rifle stocks ca WWII, etc. I assume
this it the technology you with to convert to CNC. Probably doable
but maybe a major headache.

How do the big guys make turbine blades???

Jack




--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Larry" <reiss_machinist@...>
wrote:

>
> I want to go with a lathe configuration because it will machine both
> top and bottom of the blade. A router or mill will do only one side

of

> the blade at a time. I think this method will have a faster cycle

time

> with less fuss. And the saw blade can be changed if necessary to a
> vertical belt sander for finishing.
> Thanks, Larry reiss Omaha, Nebraska
>
>
>
>
> -- In CAD_CAM_EDM_DRO@yahoogroups.com, Jack McKie
> <freshwatermodels@> wrote:
> >
> > Larry,
> >
> > Might be easier to just go with a 3 axis CNC router and ordinary
> cad/cam software. The cnc router might also be useable for other

parts.

> >
> > Another old fashioned alternative would be a duplicating mill

which

> allows you to duplicate a hand made blade.
> >
> > Jack
> >
> > --- On Thu, 1/29/09, Larry <reiss_machinist@> wrote:
> >
> > From: Larry <reiss_machinist@>
> > Subject: [CAD_CAM_EDM_DRO] Cam program and post needed for a cnc
> propellor carving lathe
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > Date: Thursday, January 29, 2009, 1:26 PM
> >
> >
> >
> >
> >
> >
> > I am interested in building a cnc propellor carving lathe to

create

> > wooden wind turbine blades, one blade at a time. The proposed

lathe

> > would be run with Mach 3 and 2 axis control having a servo motor
> > drive on the headstock spindel and one on the cross slide axis.

There

> > would be gearing and a lead screw to slave the Z axis from the

spindel

> > at the rate of .125" per revolution.The cutting tool would be a

10"

> > dia. carbide table saw blade that would move in and out on the

cross

> > slide X axis as the spindel rotated continuously.
> > I have use of a program that will create an STL. file of the
> > blade.But I need to learn of a cam program that will let me

define the

> > axis of rotation and has a post processor for a machine of this
> > configuration.
> > Thank You, Larry Reiss Omaha, Nebraska
> >
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> > [Non-text portions of this message have been removed]
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>