On Thu, 26 Jan 2023 at 15:26, Matthew Herd <herd.m...@gmail.com> wrote:
> The general concept is to put an encoder on the bull gear (which has fixed > timing with respect to the stroke of the ram), use a large servo as the > drive motor (although a VFD & 3 phase motor would also work, but this > allows easy positioning of the ram and I already have a servo with ample > power and torque). I don't think that there is much benefit in servo-ing this element of the machine. I would suggest that a simple (long) flag on the bull gear could be used to determine if the machine is on the cut or return stroke, with feed-hold asserted during the cut stroke. Otherwise you might as well retain the original motor. A rotary axis to mount on the table might be useful, though. As might a second one on the ram, for use in gear-shaping operations. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
