On Monday 14 September 2020 11:51:51 andy pugh wrote: > On Mon, 14 Sep 2020 at 16:27, Robert Ellenberg <rwe...@gmail.com> wrote: > > I think a smarter approach would be to check if the effective feed > > rate is too small (like below what a machine can actually execute) > > Is there any physical limit to how slowly an axis can move? We nearly > all own a device that moves less than 1" per hour...
As a C.E.T., I can see where it could be a carryover from the servo world, where there would be a minimum hz you could feed an AC induction servo with, but I'd expect those have by now, all died of old age. Or burnups holding up a vertical axis with worn out brake shoes. Hard steel with PM armatures shouldn't have a problem with that as long as the cooling is adequate and the currant is limited to the FLA on the nameplate. With the FLA current limit set, I can run my 1 horse AC induction spindle motor at well below 10 hz for an hour and still lay a hand on it. Other than that consideration, a minimum speed simply has no reason to exit in linuxcnc. IMO of course. 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
