On 26 May 2018 at 09:43, Gene Heskett <ghesk...@shentel.net> wrote: > On Saturday 26 May 2018 01:24:36 John Dammeyer wrote: > >> Is something like this equivalent to a single phase 220VAC 2HP motor? >> >> https://www.ebay.ca/itm/122137567723 >> >> Just thinking of how I'll add variable speed to my mill. Would it >> even need a reduction set of pulleys or is 1:1 adequate? If the >> bearings can handle it a belt ratio of 1:2 to get 6000 RPM? >> >> Thanks >> John >> > Just an observation John. but a setup intended to be run as a servo, > isn't exactly ideal for a spindle, and may overheat if asked to run > continuously. Servo's have time to cool in between moves.
I would expect it to have a thermistor to measure motor temperature, and maybe even an output from the drive to operate a cooling fan. Geared 1:1 it would give a very good speed ratio, and would also make spindle-orientation trivial. It might be worth doing some calculations to see what cutter torque you generally work with. (I would have suggested using HSM Advisor for the calculations but it seems like the free website has been closed down and it is now a commercial app) Do you already have a spindle and bearings, or were you intending to use the motor bearings as spindle bearings? -- 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
