Perhaps I'm not looking at things the right way. Assuming that the A-axis is horizontal and the spindle axis is perpendicular to the x/y-axis, I don't think that "You could use compound motion _if_ you also rotate the indexer relative to the table slots." will avoid distortion of the tooth form.
> -----Original Message----- > From: Andy Pugh [mailto:[email protected]] > Sent: Monday, November 25, 2019 6:18 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Helical Gears > > > > > 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. > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
