Re: [CAD_CAM_EDM_DRO] Re: Cutting the Hex surfaces.

Yeah, and what a cost savings on production work.

Those old screw machines were really something to watch. There are still some shops around here that use them. I've never seen one do hex's, as they usually used hexagonal stock. That was a trade in itself. The CNC lathe sent most of those to the scrapyard. Like the roughing mill did to the shaper.

Ron

lcdpublishing <lcdpublishing@...> wrote:
Pretty neat huh?

The first time I ran accross this was on a big, very old multi-
spindle lathe. I nearly wet myself laughing at it's simplicity.
However, the first time you watch it run you think it is impossible
(relative to real time watching). Once you see in slow like in that
animation, it's so simple it makes your head spin wondering why :-)

I have only used it once on a CNC lathe. Forgot the brand name of
it but remember it being a Korean made clone of a Wasino gang style
lathe. The really neat part was that once you turned on the
synchronization mode, if you had the lathe in manual mode and
rotated either spindle by hand, the other would rotate too. Funny
looking the first time you see it.

Relative to the same synching, sub spindle lathes wherein there is
another spindle where the tail stock should be, they do something
just as remarkable. Say you are feeding Hex stock via a bar feeder
into the main spindle. Then you want to cut off the part and
machine the back end. Well, the sub-spindle synchs it's collet to
grab onto the part before the cut-off. The cut-off is finished and
the sub-spindle retracts and machining continues on the back side of
the part. On these machines, there is no need for the spindles to
stop during part transfer - very scary to program and setup the
first few times.

Chris

--- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@...>
wrote:

>
> 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
> >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
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