On 11 April 2018 at 14:24, Dave Cole <linuxcncro...@gmail.com> wrote:
> You can find 3 phase gearbox equipped motors on Ebay that can get you 500 > rpm max. Another alternative would be to simply get a slow-speed motor. I have an 8-pole motor on my Rivett lathe. This one here is suggested for use from 72 rpm to 1000rpm: https://inverterdrive.com/group/Motors-AC/ac-Motor-3kw-3HP-8Pole-MAA132MA8/ Add a 2:1 belt reduction and you have 30 to 500 rpm. (I am unclear if there is any advantage between a many-pole motor and a 2-pole motor with a large belt reduction). As for drives to suit bargain motors from eBay: The STMBL (as mentioned by John above) is useful up to about 2.2kW / 3hp and can be configured to run rust about any 3-phase motor. (Induction or permanent magnet). They are pretty cheap (about £100 all-in) but the downside is that availability is a bit spotty as they are an open-source hardware design and you need to find someone ordering a batch if you don't want several. (I recently bought an batch of 50, but they are all spoken-for) -- 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 ------------------------------------------------------------------------------ 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
