I want to use a hobby BLDC motor to power a compact high speed
spindle to be used for engraving and the like. Mainly because they are
so compact for the power and speed. I cannot find, for a price I can
justify, a 24,000 to 40,000 RPM spindle that will fit in the space I
want to put it.
Looking at some hobby BLDC motors and then buying some to
experiment with leads me to think that one of these motors may work.
I have looked online for answers about these motors and maybe I'm
just dense (good possibility) but I haven't been able to find exact
answers. Maybe someone here can help.
Motors are rated RPM/volt. This means maximum RPM per volt of
course. If the motor is supplied with a higher voltage from a supply
that limits the current to stay below the specs of the motor will
higher RPM be possible?
The ESCs (Electronic Speed Controller) are voltage and current
rated. Could the output an ESC rated for a lower voltage and current
be used to drive control power transistors in order to get around the
lower voltage and/or current rating if a sensored motor is being used?
I don't need to use a hobby ESC but they are plentiful and cheap.
And all assembled. Which is most important. But I would be fine using
some other BLDC motor driver in order to get the desired RPM that I
want.
I can do all the precision machining necessary to make the spindle
that will hold the carbide cutting tools and to interface the motor
with the spindle. I do not yet know enough about balancing in order to
dynamically balance a motor which causes too much vibration from an
out of balance condition but I think I can learn enough to do it. I am
good with mechanical systems and have a pretty good intuitive feel for
them. It's the electronics I'm not so good at.
Thanks,
Eric