[CAD_CAM_EDM_DRO] How does a polygon turnign lathe work?

I think the question gets lost in the woodwork. There are a few billion
people there ranging from good English in Hong Kong to every permutation
possible.

I have seen videos where an Englishman is obviously reading a poorly
prepared script. I wonder how many American or European companies go to the
effort of producing videos in oriental languages?

Regards
Roland

On 7 October 2011 21:18, Danny Miller <dannym@...> wrote:

> **
>
>
> I am highly amused that the English voiceover speaker seems accent-free,
> but is still speaking in Engrish.
>
> Was it a native Chinese-language speaker who took English pronunciation
> and yet still doesn't understand the language? Or did they send it to a
> native English speaker who didn't try to clean up the syntax?
>
> I'm guessing the former, it's not a Chinese accent but the overall
> pronunciation is a bit weird for a native English speaker.
>
> Danny
>
>
> On 10/7/2011 12:02 PM, wolfgang wrote:
> > it looks like a single point cutter that's moved in and out depending
> > on the angle of rotation of the cutting head.
> >
> > The cutting head spin is synced to the lathe rotation by the shaft in
> > the back, so the two are moving in lock step. I'm guessing it's not a
> > 1:1 gear ratio, otherwise the cutter would hit the same spot every
> > time.
> >
> >
> > On Fri, Oct 7, 2011 at 12:23 PM, Douglas Vogt<dbvogt@...> wrote:
> >> The flats may be concave after all but not noticeable at this diameter.
> Look at the second video from citizen showing slow motion. The cutter makes
> a much larger diameter pass on a relatively small diameter piece. The larger
> the diameter cutter and smaller diameter work piece, the less concave will
> be the flats of the hex. What is surprising is that the cutter diameter is
> under CNC control as well as in the video you cite - the cutter makes a
> second larger hex closer to the chuck without missing a beat. It seems the
> number of "axes" in a machine can be extended well beyond what we're used
> to. All possible due to CNC.
> >>
> >> Stop the video several times and you'll likely see a perfectly
> consistent reflection on the flats as if they were truly flat. Stop it at
> 1.02 and you see the top and bottom parts of the flat shiny but the middle
> of the flat is darker suggesting concavity.
> >>
> >> Of course, this completely a guess :-)
> >>
> >>
> >>
> >> From: danmauch<dmauch@...>
> >> To: CAD_CAM_EDM_DRO@yahoogroups.com
> >> Sent: Friday, October 7, 2011 11:44 AM
> >> Subject: [CAD_CAM_EDM_DRO] How does a polygon turnign lathe work?
> >>
> >>
> >>
> >> I saw thisamzing video http://www.youtube.com/watch?v=KMdBIBzGtKI and
> can't quite figure out how the machine is cutting the hex so perfectly. I do
> see that the cutter is just a staight bit and see that the millhead is
> syncronized via drive shaft to the spindle. But with the cutter on the
> perimeter of the milling head I would think the hex flats would be concaved.
> So how does the machine actually work?
> >> Dan
> >>
> >>
> >>
> >>
> >> [Non-text portions of this message have been removed]
> >>
> >>
> >>
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> subjects, that are not allowed on the CCED list.
> >
> > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
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