> On Fri, 28 Oct 2022 at 17:57, John Dammeyer <jo...@autoartisans.com> wrote: > > > Although again, if one has a mill and a rotary table why bother with the > > lathe? > > Holding the keyway cutter is easier on the lathe. > > I have toyed with the idea of making a sub-spindle, with D1-4 male on > one side and female on the other side. Maybe a simple indexer, or > maybe something totally wacky for relieving: > http://www.lathes.co.uk/holbrook-B-13-71-21/img3.jpg > Say one wanted to cut internal splines in a toothed pulley. It's likely easier to index the pulley with a rotary table on the mill to create the external gear teeth unless the lathe is really big.
The internal splines require a formed cutter held in the vertical mill spindle collet. We're back to the same issue with the lathe spindle. How to lock the spindle from twisting. Once positioned it's up and down and increment X or Y depending on which way the cutter is oriented. To do multiple splines index the rotary table and do it again. Or be really clever and turn the spindle say 30 degrees and lock, and then move both X/Y along the depth of cut but that seems like way more work. If something has been turned and bored on the lathe, I agree slotting splines while it's held in place on the lathe is likely easiest. One less setup. Again though, how easy is it to run a threading operation G-Code that ignores spindle RPM? Or is the threading so tightly linked to spindle speed pulses that it can't be separated? John _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
