> On 25 Nov 2019, at 20:09, John Dammeyer <[email protected]> wrote:
>
> Or does the X axis even need to be pivoted? Can X and Y motion be
> co-ordinated to do the same thing or does the table physically have to
> present the gear blank to the cutter with an angle as in the pivoting table?
I take it you are talking about gear hobbing not cutting teeth one at a time?
https://m.youtube.com/watch?v=ZhICrb0Tbn4&t=44s
https://m.youtube.com/watch?v=PFTHY5U8v-U
I think that the blank needs to be presented to the job at the correct angle of
the tooth form will be distorted due to the length of the engagement.
You could use compound motion _if_ you also rotate the indexer relative to the
table slots.
A swinging table will have the advantage of angle graduations.
I do have a plan for a micrometer stop to set mine to the exact angle. With a
cunningly-shaped contact block a mm micrometer can be made to read direct
degrees. I have it all designed and the parts bought. But, well, you know how
it is.
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