Re: Cutting the Hex surfaces.

Ah-hah, I knew google would know :-)

Go to this web page....

http://www4.profilator.de/dienstleistungen/videos_animation.html/#

then scroll down to the video animation sections called
POLYGON AND SLOT MACHINING

Look at the video (animation) that is right above the text
GEAR CUTTING

This animation takes you from fron view, spins around to see it from
the back side. There you can see how the hex shape is machined.
The the animation takes you back around to the front where you can
see how the "lugs" are made on the face of the part.


Chris






--- In CAD_CAM_EDM_DRO@yahoogroups.com, "lcdpublishing"
<lcdpublishing@...> wrote:

>
> No tricks, no moving X axis, only the Z axis is moving to take
> succesive passes. There are machines that do have the X axis goin
> in and out during the rotation of the spindle, but that process is
> used for turning pistons (as they are not round, but oval). I
> forget what that is called - sorry, getting old.
>
> In polygon turning, the flycutter (the Orange tool in the video)

is

> spinning just like a flycutter or even a face mill. The main
> spindle is spinning the workpiece in the opposite rotation. As

the

> fly cutter passes by the spinning workpiece, it creates a very

near

> flat surface on the workpiece. The ratio of speed and number of
> teeth control the number of flats. The ratio between the two
> diameters (part and cutter) determines, to a certain degree, how
> flat the surface will be.
>
> Programming is incredibly easy...
>
> M123 'M code to synchronize spindles
> G97 S2000 M03 'main spindle
> S1000 M04 'driven tool
> G00 X1.0
> G01 Z-.5
> G00 X2.0
>
> That's it, all the "Magic" is in the rotation of the two items

(Part

> and cutter) and their synchronization. The M123 is not the actual

M-

> Code nor is M04 for controlling the rotation of the live tooling,
> but hopefully you get the idea.
>
> Remember, this process goes back to screw machines and automatics -

> prior to CNC. So, it all had to be done with: gearing, ratios,

and

> mechanics. As insane as it all seems, it is really very simple.
>
> Chris
>