On Sunday 11 October 2009, Steve Blackmore wrote: >On Sun, 11 Oct 2009 10:16:46 -0400, you wrote: >>So in short, it should be called a VSD, not a VFD. A >>VFD would need a 3 phase motor, and made to run synchronous if it is to >> have usable torque at low speeds. Minor nit picking to be sure but there >> is a world of difference in the actual hardware. > >As I said, there are several different boards, the latest designs use 3 >phase motors, with an encoder on the motor shaft, giving feedback to a >VFD. > Ah, that explains it then, thanks Steve. How is the torque at crawl speeds with that?, or does the motor have a hard (magnetically) steel armature so they operate synchronous up to the stall torque? More like a stepper with 3 phases I'd assume, and low speed torque should be abundant then.
I've considered getting an X3, but my most recent purchase, a Rikon 10-325 bandsaw, has about worn out the better half's tolerance. OTOH, she is ohhing and ahhing over the new wooden panels I am installing one by one in the kitchen cabinet doors & eventually drawers too. Butternut, book matched, with a slight tint of cherry stain in the Sam's recipe finish I'm using. Sam being Sam Maloof, a designated National Treasure woodworker who died last may at 92. >Steve Blackmore >-- > >--------------------------------------------------------------------------- >--- Come build with us! The BlackBerry(R) Developer Conference in SF, CA is > the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9 - 12, 2009. Register now! > http://p.sf.net/sfu/devconference >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users > -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) The NRA is offering FREE Associate memberships to anyone who wants them. <https://www.nrahq.org/nrabonus/accept-membership.asp> A day without orange juice is like a day without orange juice. ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
