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

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "vrsculptor"
<vrsculptor@h...> wrote:

>
> Has anyone done one of the brushless R/C motor spindles yet. I'm
> curious as to how it worked out and what motor/controller you used.
> Thanks,
>
> Roger
>

Roger
I have been looking at building my own spindle for a mini mill. The
electric R/C plane craze has dropped the price of small brushless
motors (100W to 400W) to < $200. The controllers are also getting
cheaper.

But , You can build a 200watt brushless motor from a cdrom drive
motor, rewound and with a special controller.

See www.gobrushless.com for a kit to build the motors. They also
sell controllers as well.I bought the motor kit and some parts but
have been too busy to get it going.


OR google LRK motor or go to:
http://users.cybercity.dk/~ccc16084/LRK.htm


Google speedy-BL for a U build brushless speed controller. I got one
( from Germany) as well but have not assembled it yet.. Not for the
novice lots of small parts to solder.

Note that all of this R/C plane stuff does not use good bearings.
They can tolerate runout in the R/C plane props. You will need a
good bearing tube design to do 40K RPM with minimal run out. But the
motor/controller technology is there for you to build or buy.



Best regards
Dave