On Tuesday 02 January 2018 10:26:42 Eric Keller wrote: > On Tue, Jan 2, 2018 at 9:04 AM, Dave Cole <linuxcncro...@gmail.com> wrote: > > Except that he needs a 5 hp single phase inverter. Those are a > > little harder to find and a lot more expensive... near $1000 for > > this AC Tech Drive. > > The Huan Yang line of VFDs sold on ebay feature a 4kw version that > will run off of single phase. The only problem with them is lack of > braking on some models. The Mach crew have figured out the modbus > connections. About $200.
And they are full 4 quadrant controllers, so within reason no braking R's are required. Laying on the table, I can reverse a 1hp 3 phase motor turning 2400 revs, fast enough to make it jump 3" up in the air with one of those 1.5 horse rated, $128 on ebay controllers. Installed on a lathe with an 8" chuck, I have to program it to take a bit over a second to reverse that 8" chuck from 200 revs because I have to set a limit of the decel current else it self protects with a total shutdown. So I am a happy camper until I decide to put a 5 hp on my old Sheldon. Can I do rigid tapping? Yup. I have hal code to tell me how much overshoot occurs at the bottom of the hole, so I don't break taps hitting the bottom of a blind hole. 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
