On Tue, 27 Jul 2021 at 14:10, Earl Weaver <[email protected]> wrote:
> Would there be a benefit for me to change the motor pulley to a smaller > size? I think that would depend on your planned use. My lathe can do 3000rpm but the macros I use with constant surface speed top out at 1500rpm and I very, very, rarely find that too slow. So, I suspect that, unless you do a lot of very tiny parts, gearing for 1500rpm would suit you better if you regularly make 8" parts. My lathe, at 3000rpm, is unusually fast for an 8" lathe. CNC and carbide has changed the rules a bit, but if you go back to the 70s a 10" lathe would tend to top out at 1500 and a 15" at 800 rpm. It seems that your spindle motor is a wound-field motor, I don't know very much about those, but I think that they have rather lower low-speed torque than a permanent magnet motor. (Though this might depend on whether the motor is wired shunt or series) But they are typically used where a wider range of operating speeds than can be used with an induction motor is required. -- 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, 1912 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
