Re: [CAD_CAM_EDM_DRO] Re: Is there a comparison between milling machines and software?

Hi Fred:

Thanks for the info. This is very helpful.

Hugh

--- Smoke <gordonr@...> wrote:

> I don't know anything in the way of comparisons but
> I do know from
> experience on my Roland MDX machine that Rolands
> software generates a huge
> machining file which creates a lot of un-necessary
> motion. I know this just
> from watching the machine machine over the same area
> several times machining
> air on the second and subsquent passes.
>
> I also know that on this machine it is terrible for
> cutting wax as the
> spindle speed is way to high for this material and
> is non-adjustable.
>
>
>
> >--- In CAD_CAM_EDM_DRO@y..., mprogee@y... wrote:
> >> Hello:
> >>
> >> Has anyone had experience comparing actual speeds
> milling 3D
> >objects
> >> with the range of milling machines under $5000? I
> am trying to
> >> determine how long it would take to mill a 3D
> object like the
> >> examples on the Roland website
> >>
>

http://www.rolanddga.com/products/3d/combo/mdx15/mdx15_features.asp

> >> (3D Max head, Lightwave cow) using other CNC
> mills such as:
> >
> >For those kinds of models you might also want to
> consider a benchtop
> >router, rather than a milling machine. Unless you
> plan to make the
> >part from metal, the routers are accurate enough to
> be visually
> >acceptable, but will not machine a tight fitted
> machine clearance.
> >
> >The Shopbot benchtop is about $5000 and I believe
> that it will rapid
> >at 180+ ipm, and can probably cut most wood and
> plastic at speeds of
> >around 60-120 ipm.
> >
> >If you have access to software that will either
> calculate the length
> >of the tool path or a simulation program like meta
> cut view, they
> >will tell you how long the cuts will take, at the
> various machines
> >cutting speed. Vector Cam can backplot a G-code
> file of the cutting
> >path and then calculate the cut time.
> >
> >One thing to bear in mind if doing ANY comparison
> to the Roland
> >machines, they are built similarly to printers.
> There is not much
> >strength in the frame, the spindle mount, the
> spindle bearings, or
> >the axis drive motors. I have never heard from any
> Roland customer
> >that had successfully and satisfactorily machined
> metals, and even
> >plastics are problematic for some. Wax seems to be
> the preferred
> >material.
> >
> >I didn't answer your question, but maybe I helped
> you in your quest
> >for information.
> >
> >Best Regards,
> >
> >Fred Smith
> >IMService
> >
> >
> >
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