My 8" chuck has a max 2500 RPM, I would think 1500 RPM would be
sufficient for my use.
The motor has 2 line wires and 2 shunt field wires. plus tachometer
feedback wires.
On 7/27/2021 10:02 AM, andy pugh wrote:
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.
**Earl Weaver
Email: [email protected] <mailto:[email protected]>
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