RE: [CAD_CAM_EDM_DRO] Cutting the Hex surfaces.

Hi John,

Chris nailed it with counter-rotation. Think about the two turning in opposite rotations.

When the tool contacts the workpiece, that would be the point of one hex. When the tool is in line with the centerline of the worpiece, that would be the bottom of the flat. Remember, the workpiece is spinning too. When the tool leaves the part its actual path upon the workpiece was straight, because the worpiece is rotating as well. It's an ingenius method of cutting flats on a rotating piece.

The timing would have to be perfect, It's probably a do-able project with Mach3Turn. Make "orange" one axis. Would be a real bite to program I would think.

Ron
John Dammeyer <johnd@...> wrote:
Hi Ron,

The stroboscopic effect showed the spinning cutter apparently frozen where
it was while cutting a flat so I'm sure the video interfered with showing
the actual operation of the rear cutter.

So you think the rear cutter is actually moving in and out rapidly? Way
back in a Model Engineer's Workshop article someone built a mechanism to
provide relief on hobs. It moved the X axis in and out on a cam IIRC. That
created a back relief smooth slope till the next cutting tooth.

I can see sync'ing up the cutter with the spindle so the cutter always
starts at the same spot for each flat. I'm just having trouble getting my
head around the geometry for cutting the flats.

I guess it's really motion in 5 axis (spindle X,Y and CutterHead X,Y)
combined to produce a straight line tangent to the Z axis?

I wonder if MACH3 can do this?

John Dammeyer

Wireless CAN with the CANRF module now available.
http://www.autoartisans.com/products
Automation Artisans Inc.
Ph. 1 250 544 4950

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of R Rogers
> Sent: Tuesday, December 26, 2006 11:09 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Cutting the Hex surfaces.
>
>
> Hi John,
>
> It's all timing.
>
> Precision radial feedback of both, high acceleration,
> speeds and programming. It's cutters are timed with the
> spindle perfectly.
>
> The Camware they are using probably does all the radial
> calcs and X moves of the "Orange" turret. Or the "Orange"
> device may have some sort of programmable internal orb like a
> jig grinder, Would be virtually impossible to program by
> hand. Very impressive..
>
> Thats my guess.
>
> Ron
>
> John Dammeyer <johnd@...> wrote:
> Hi guys,
>
> http://www.youtube.com/watch?v=oGq-9NNmr3o
>
>
> Any idea on exactly how the rear orange spinning tool cuts the flats?
>
> John Dammeyer
>
>
>
>
>
>
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