Doesn't matter. These high speed spindles are not like the motor you have in your Sheldon. They will burn up in a short time if you run them too slowly.
But, it's your stuff. If you're willing to take the the very real chance of either burning up your high speed spindle or destroying the VFD by inputting incorrect parameters, by all means have at it. Been a moderator on CNCZone for a good number of years and have seen many folks in the spindle/VFD forum who've done just that because they figured just any old setting would do or they tried to run their spindle too slow. Mark On Wed, Jan 23, 2019, 18:18 Gene Heskett <[email protected] wrote: > On Wednesday 23 January 2019 17:48:20 Mark Wendt wrote: > > > And the data plate from the motor. Incorrect settings in the VFD can > > and will result in the destruction of either the VFD or the motor or > > both. The settings are quite specific to the motor ratings. Running > > the motor slower than 6000 to 8000 RPM's will burn up the motor if > > it's a high speed spindle. You can run a water cooled spindle slower > > than an air cooled spindle but not by much before the windings burn > > out. > > > > Incorrect settings on other VFD parameters can and will destroy the > > VFD. The manual is quite important to have setting the VFD up and you > > shouldn't try to power the spindle up without the correct settings > > programed into the VFD. > > > > Mark > > > This seems to be defaulted to quite conservative settings. With the low > speed boost backed off, default is 4 and probably too much, it should be > able to run slower than that by quite a bit. I can run the 1hp in my > sheldon at 10hz for an hour or more without getting so warm I can't lay > a hand on it. I never exceed the nameplate fla of a motor at any speed. > It will get warm, but the torque seems to hold up well enough to cut > steel. > > Thanks Mark. > > On Wed, Jan 23, 2019, 17:33 andy pugh <[email protected] wrote: > > > On Wed, 23 Jan 2019 at 22:27, Gene Heskett <[email protected]> > wrote: > > > > Many thanks for any clues from someone WHO HAS ACTUALLY DONE this. > > > > > > Without any hint of what model VFD this is, or a glimpse of the > > > manual, I doubt anyone will be able to help. > > > > > > -- > > > 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, 1916 > > > > > > > > > _______________________________________________ > > > 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 > > > 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) > 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
