Re: [CAD_CAM_EDM_DRO] Speaking of tangents, etc....

Hi,
If machine would have good cnc control like Num, Siemens, Fanuc (latest model) or Fidia this would not
be the problem cause these controls have function RTCP (rotation around tool point) and with this function control needs only tool nose center point and angular dimension or at least Num have N/M function where operator can have manual jog control of
two rotating axis when machine is machining 3 axis toolpath.
These functions makes 5 axis all moust as easy as 3 axis machining.
I have been making aircraft and spacecraft parts with 5 axis machine and Num cnc more than 10 years and when we get these functions with model NUM 1060 S2 control the work has been easy.
Regards Mika.

----- Original Message -----
From: "doug98105" <dougrasmussen@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, April 28, 2002 10:08 PM
Subject: [CAD_CAM_EDM_DRO] Speaking of tangents, etc....


> Group,
>
> One of my customers has a high speed 5 axis vertical machining
> center, X,Y,Z plus rotate and tilt of the vertical head. They make
> high-end musical instrument parts.
>
> The usual cutter is a full radius ball end type which causes problems
> on certain contours where the actual point of cut is near the tip of
> the cutter. At the tip the peripheral speed is near zero, meaning
> the feedrate has to be so slow that it's unproductive. That's where
> the two extra head motions come in. The cutter can be oriented so
> it's never normal to the contour being cut.
>
> One of their big problems was how to instruct the machine to
> correctly orient the head. They use the latest and greatest from
> Mastercam which apparently wouldn't do the job. Last I heard, they
> were hiring a Mastercam expert to develop a post processor to handle
> the head movement. The cost of the post was estimated to be
> $15K!!!! Fairly complicated stuff.
>
> Doug
>
>
>
>
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