Re: [CAD_CAM_EDM_DRO] How does a polygon turnign lathe work?

On 10/07/2011 11:44 AM, danmauch wrote:

> I saw thisamzing videohttp://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

If you look at the end of
http://www.youtube.com/watch?v=-9jMN9Bgg6g&feature=related
<http://www.youtube.com/watch?v=-9jMN9Bgg6g&feature=related>, you will
see that at the beginning and end of the cutter stroke, the workpiece is
not at the same rotation as when the center is being cut.

It is tricky and takes a bit to comprehend!

Dave 8{)

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