I would find the original drive specs for that motor. I'm sure they had
a matching drive for it.
The specs for that drive/motor combo should specify the max speed of the
motor with that particular drive along with the torque vs speed curve.
It may be 2x the rated speed but at reduced torque. That's not unusual
for servo motors.
Dave
On 10/3/2018 7:57 AM, Roland Jollivet wrote:
On Wed, 3 Oct 2018 at 11:32, andy pugh <bodge...@gmail.com> wrote:
On Wed, 3 Oct 2018 at 06:49, Roland Jollivet <roland.jolli...@gmail.com>
wrote:
If only the speed was a lot higher, it would be an awesome spindle motor
for rigid tapping.
How much did you pay for it?
What do you imagine would happen if you ran it faster?
You could always gear it up. Maybe have a 1:1 ratio for tapping and a
speed-up for normal milling.
Either one toothed belt and two sets of (carefully chosen) pulleys or
two permanently-engaged toothed belts with a peg to engage the
high-speed ratio and an over-running clutch on the low-speed one:
This one can do 85Nm:
https://simplybearings.co.uk/shop/p152524/CSK25PP-25mm-Sprag-Clutch-One-Way-Bearing-with-Internal-&-External-Keyways-25x52x15mm/product_info.html
--
atp
I probably paid about $10 for it, as scrap metal, from a CAT scan machine.
I remember the scrap yard guys rolling their eyes as I carried it out of
there. Junk collector....
I don't know if it could run faster with the correct drive. Maybe back EMF
would be a problem? I would like 7000 RPM, but I don't think a 10:1 setup
is practical.
And surely it's rated 700RPM for a reason. I doubt the magnets are going to
fly apart, so what would that reason be?
The irony is that I've just got myself a scrapped CNC mill with a missing
spindle drive motor, that's why my attention was back on that motor.
This is a LinuxCNC candidate so I will document/blog the re-build.
The over-drive arrangement would work, but maybe better suited to my lathe.
Direct drive for threading, then step-up to ~ 2000RPM max for turning.
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