Is https://www.youtube.com/watch?v=6rsKuE90rjE what you mean? That is a personal video but there are others on YouTube if you search for "helical gear CNC"
> -----Original Message----- > From: Gene Heskett [mailto:[email protected]] > Sent: Monday, November 25, 2019 3:33 PM > To: [email protected] > Subject: Re: [Emc-users] Helical Gears > > On Monday 25 November 2019 14:09:00 John Dammeyer wrote: > > > I'm not even close to being able to do this yet but I've been perusing > > youtube videos and I have a question. > > > > https://www.grizzly.com/products/Grizzly-9-x-39-2-HP-Horizontal-Vertic > >al-Mill-with-Power-Feed/G0757 > > > > This particular Grizzly mill like the older G3617 has a horizontal > > mill feature and the ability to rotate the X axis table. There are a > > number of videos out there that show that when the rotary indexer is > > coupled with gearing to the X axis drive and the table is pivoted to > > say 20 degrees that the horizontal mill with a gear cutter can turn > > out helical gears. Doesn't look like any sort of spindle coupling is > > needed. > > > > Now change to a LinuxCNC controlled "A" Axis Rotary Indexer and a > > pivoted X axis table the indexer could be slaved to the X axis in > > software to accomplish the same thing. Is that correct? > > > > 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? > > > > If simultaneous motion does duplicate the angled table, then if the > > gear cutter is in the spindle will co-ordinated X,Z and A result in > > the same thing as the gear driven helical gear cutting? > > > > And how would you even write G-Code to do this? > > > > Just curious at the moment. > > > > Thanks > > John > > Offhand, I've not done it either, but it seems to me that Y could be > moved at the angle needed by arriving at the y distance as being the > angle derived from the X distance as a transcendental function, but z > would also need to be moved up and down. That would then be a g2 or g3 > function whose radii was half the diameter of the gear. I think I'd cut > a lot of air verifying it though. > > Next question: short of having a handfull of the tool custom ground, > where would you get a suitable tool? I've not seen such a critter for > sale. > > Another possibility would be rotation of the co-ordinate map so as the > make successive teeth by a step shift of x. Or better yet a nice rigid > rotary table, with which I have made the spiral flutes of an emergency > drill bit with. Mine weren't all that precise because the table is a > POS from India, but it did get the job done, as in how precise do you > have to be when drilling construction treated wood? Not very. > > Just throwing it out there, no clue if it will stick. ;-) > > > > > > > > > > > > "ELS! Nothing else works as well for your Lathe" > > Automation Artisans Inc. > > www dot autoartisans dot com > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > _______________________________________________ > 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
