Re: 7 square holes --was,lost post

>Message: 11
> Date: Wed, 13 Dec 2000 21:33:36 -0700
> From: "Smoke" <Smoke@...>
>Subject: Re: Re: 7 square holes --was,lost post
>

So then you are not sure what angle, or even that the angle would NOT work.
You are just theorizing that by tilting the part. (Note I said tilt the part,
NOT tilt the head). As this is much easier and cheaper to do with a CNC machine,
I would not go for the articulated head if I had a rotary 4th axis. The 4th axis can
have a spindle bearing & heft equivalent to a lathe, whereas an articulated mill
spindle is usually about 1/10 of the strength of a non articulated for the same size and weight.

By tilting the rotary table, and mounting the CUBE in it's center, one could easily program
indexes to each corner and cut along the 3D crease where the square corner is desired.
You could also take 2 cuts per corner, to compensate for any difference between
the inclined tool angle and the desired 90 degree corner.

You have disagreed with my suggestion but not provided anything to help me,
or others to logically conclude if you are correct or not. As the answers about how
to calculate the correct angles might have a very practical impact on the ability to
actually program a 5 axis machine I am interested in your views.

>The angle you need to regrind the point to depends on what angle the head is
>tilted to. I'd have to sit down and draw this out and calculate the angles.
>At the same time I did this I'd be able to check for clearance between the
>tool head and the work.
>
>Smoke
>

I wrote previously:

>>What angle? What if I rotated the part to position 1, cut the
>>corner, rotated the part to position 2 and cut the corner again?
>>Wht are the positions?