On Thursday 02 February 2017 11:29:52 Sebastian Kuzminsky wrote: > On 02/02/2017 08:45 AM, Gene Heskett wrote: > > On Thursday 02 February 2017 10:02:59 Sebastian Kuzminsky wrote: > >> On 02/02/2017 03:27 AM, andy pugh wrote: > >>> I am using a typical eBay HuangYang VFD on the lathe, and it works > >>> nicely with the HAL module (even though it isn't _actually_ real > >>> modbus, or so I have heard) > >>> Some eBay adverts make a point of stressing that they are selling > >>> genuine HuangYang, not fake HuangYang. > >> > >> I've used Huanyang VFDs on machines at the local hackspace. If you > >> go this route, two notes of caution: > >> > >> 1. Make sure to use an AC reactor on the input. > > > > How much reactance is needed? And is this for electrical noise > > reduction or ? > > We bought this one: > http://www.ebay.com/itm/MTE-RL-04501-AC-Line-Load-Reactor-3-Open-Type- >3-Impedance-Transformer-/302102247034?hash=item4656b2767a:g:UsIAAOSwh2x >X-zu7 > > We're using 0.3 or 0.5 mH coils I think.
.3mH according to the picture at that link. > It's not for noise reduction, it's to limit the inrush current and > keep the upstream breaker from breaking, and the contactor from fusing > its contacts. > I see, for similar reasons as the soft start on my bigger mill. Keep the breaker from tripping on power up. I doubt if this "Brick Wall" filter will have any great effect on that, besides, its a 1 hp, and a 1.5 hp rated vfd. With big enough input filters to work on single phase, 254 across the inputs. At .3mh, for your's, you might be able to see the improved power factor, which would also be reflected in the power consumption. > >> 2. The LinuxCNC Huanyang driver only works with the older style of > >> Huanyang VFDs. It does not work with the newer GT-series models. > >> I'm working on a new driver for Huanyang GT VFDs, but it's not > >> ready yet. > > > > Is it so special that a PWMgen, set for PDM mode and a SpinX1 can't > > run it? Whatever this thing I bought actually is, that works fine. > > Except for the electrical noise that is. This takes advantage of > > the PDM mode not being a discrete step, but inherently quite > > stepless. Response to the spindle override slider is both smooth > > and fast, so CCS speed changes should be smooth and fast. > > I've never tried running our Huanyang VFDs via analog control or PWM, > we always use Modbus. I see. Thanks Sebastion. 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> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
