Re: old sherline Y travel

Ballendo,

Yeah, it's helpin'. OK, I see it now. That's what I had to do to make
the crankshaft plates. Took four cuts to get around a 3" (max)
"hourglass" part. Then that means rotate the flywheel to set up for
each cut. I can see how that would work also.

Printed out a paper copy of the flywheel, and it swings on the lathe.
Still a little tricky getting the hextants cut out if I simply use the
rotary table to "position" to the hextant (OK, pie shape) to be cut
out. Mapping "C" (rotation around Z ?) to "Y" is a good solution, but I
haven't figured that out except for "wrapping" "Y" around an "A" axis.
I'm suppose if I were using 4-axis CAD/CAM and controller that this
would be simpler? Still a good challenge to the old brain, 'tho.

Alan (I think I may have confused myself)


ballendo@... wrote:

>
> Alan,
> >Circular interpolation would be fine, if I could swing all the way
> >around the part! 2 or 3" throat/travel is quite limiting!
>
> You might have missed my point here?! You don't need to do the ENTIRE
> part in one go! Just program 60 degrees of the part, which should fit
> in the 3 inch travel you have available. Then, use the repeat-
> ablility of your CNC to duplicate this 5 more times! The circ interp
> I spoke of would really be ARC interp, in this case.
>
> Hope this helps.
>
> Ballendo