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

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Andrey Lipavsky"
<alipavsky@c...> wrote:

> Whelen,
> This will NOT work for brushless motors as they are essentially

3-phase AC

> motors and have 3 lead wires.

This is correct. hobby motors are either brushed or brushless and
each type requires it's own driver.

I have one of the spindles from the links, and it almost requires you
buy the speed controller from him.

The hobby motors are rated for use with batteries so are 9.6 volts or
some such and 20 amps or so.

As a cost/benifit comparison, a Dremel or larger devices are much more
attractive. A trim router will cost around $125.00 and you can get
speed controls for them for less than half that again.

I have one of the spindles from the link and I can say I am impressed
with the workmanship, but a little disappointed that some parts are
epoxied so are permanent. You cannot remove the motor easily, if at all.

Dave

>
> Roger,
> If you're interested in making or acquiring a brushless spindle

system, I

> can highly recommend you check out eBay auctions 7534416644 &

7537063184 and

> contact this guy. His name is Richard and I've purchased several

items from

> him as his products are very high quality. He's also extremely helpful,
> even if you're just asking questions for your own project.
>
> I don't have any connection with this vendor. I've just been very

satisfied

> with several purchases and subsequent support.
>
> Andrey
>
> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of whelenremington
> Sent: Wednesday, October 05, 2005 10:34 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] 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 havn't done one but I've been wondering about the same
> thing. Hans Wedemeyer at http://hans-w.com has a link "DC Motor
> Speed Control" on his site but I don't know if it will control a R/C
> dc motor. If I remember correctly, the R/C dc motors run off of
> batteries. They seem to be of high enough torque, may have a
> respectable duty cycle for long machining runs, and may use rare
> earth magnets to get the extra torque. I am not sure about the
> bearings, their pre load, ability to take heat buildup, and the type
> of bearings used, as well as the abec class. As you see I don't know
> much about the performance characteristics of the R/C dc brushless
> motors, but I have been wondering why they would not be useful as
> high speed spindle motors for PWB drilling applications. And as you
> have asked, how do you control their speed and get dc current to
> them. Maybe someone will help us out with some answers.
>
> Whelen
>
>
>
>
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