Re: [CAD_CAM_EDM_DRO] Re: Has anyone done one of the R/C motor spindles?

If I think your wanting to do with these motors what
I think, it will not work. They are setup for rpm, not
torque. I have a novak SS 5800 in my AET4. These
motors are to small to do what you want to do with
them. If you did a gearbox and then hooked them up
maybe. but the costs that would be required would make
it not worth it in the end. There are many other types
of brushless motors that you can buy but non that I
would use to move an axis.

--- turbulatordude <dave_mucha@...> wrote:

> > The low end systems (such as the Novak Super
> > Stock system :
> >
>

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGDP6&P=ML

> ) come
> with
> > a 175W motor, Kv 4300 rpm/v Kt 0.45 oz-in/amp.
> Maximum voltage is
> about
> > 8.5v, so around 36kRPM max. For another $40 you
> can step up to a
> > faster, more powerful motor.
>
>
> I get confused with all the numbers.
>
> Kv = rpm per volt, assume 8.5 vols, so 4,300 RPM
> times 8.5 = 36,550
> RPM max.
>
> then Kt = oz-in per amp.
> since it is a 175 wqtt motor, we can figure a 20 amp
> power supply.
>
> Using 20 amp, then 20 times 0.45 = 8.1 oz-in for a
> motor.
>
> ( 36,550 x (8.1x.00521) ) / 5252 = 0.326 hp
>
> Somehow I think the numbers may be wrong, but if
> that is correct, then
> those motors have a LOT of power in a very small
> package.
>
> It is a shame the cost is so dern high.
>
> Dave
>
>
>
>
>
>
>
>
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