On Wednesday 17 July 2019 23:36:17 John Dammeyer wrote: > > Yup, there are quite a few ways to skin this cat. Mine may not be > > the best, but "it works for me". > > > > > > Cheers, Gene Heskett > > At the moment my cat is more of a lion. I have this really nice 1.8kW > servo and drive that just arrived yesterday. 19mm shaft, 6mm key none > of which will fit the existing pulleys on the 2HP single phase motor > (1.5kW). With all the belts removed I turned on the existing mill > motor and I'm amazed at how noisy it is. Hum wise. Flip power off > and it coasts silently (almost) to a stop and just before that the > noise of the centrifugal switches dropping out. My 1HP 3phase > Baldor with VFD on the SouthBend Heavy 10 is way quieter. > VFD's do seem to cut the audible noise consideably.
> At 1725 RPM and two B size belts and an intermediate pulley the range > of 9 speeds is from 270 to 2950 the low and the high range with the > single phase motor are lacking. The new servo is 0 to 3000RPM and I > think I'll use two pulleys to try and reach 6000RPM > > I haven't yet decided if I'll use 0-10V, step/dir or Modbus to run it. > Probably easiest to use step/dir on the second parallel port. I do > have Peter Homann's little Digispeed DC-06 which takes step/dir and > creates isolated 10V and MACH3 has a checkbox to support that. But > since the servo already supports step/dir it's rather pointless to > change that to 0-10V externally when the drive can do it internally. > > Not sure how I'd use that for LinuxCNC. In fact I'm not sure how I'd > configure LinuxCNC to run the spindle with step/dir since it seems to > be more PWM oriented. Maybe someone can explain how I'd link a > step/dir motor to the LinuxCNC spindle in the HAL file. IMO the docs for howto are lacking, but think in terms of a velocity loop, where position is not the target, but velocity is. PID's can handle that nicely but the howto docs aren't as clear as they should be. > > https://www.grizzly.com/products/Grizzly-Vertical-Mill/G3616 > Sweet, bigger than anything I have. > > John > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
