Re: Brushless Motor Spindle with CNC desktop machine

Thanks for the info Dave,
I misstakenly responded to Paul K for you post so if Paul is reading
this then thank you as well.
I am lucky to have some extra money floating around each pay as I have
no children and own my own home so I can spend a lot more money on my
loved one, the house and last but not least......ME! :)
After changing brushes over the last 12 months at $16 a pair I have
found that I have more than paid for the router nearly 2 times the
original cost ( I suspect the brushes are very inferior to other
reputable branded ones) of the machine. This has led me down the
brushless path at $228AU . If I get 4 years out of the motor then it
will more than make up for any brush changes and stalling of the
cutter in mid cut and having to throw the part away due to a non
cutting action dragging the tool over the job.
It should be an interesting project.
thank you for responding Dave.

> Hi Richard,
>
>
> I think the hobby motor is still being overlooked by most of us.
>
> A RC car motor can spin at 25,000 RPM and uses about 9.6 volts. Of
> course, the ones I've seen use brushes, so that is a problem as you
> mentioned. replacement is a PITA.
>
> But, I opted for a simple DC motor controller (brushed) instead of
> trying to use the RC variety. first, because it was less than $20.00
> and second, I just didn't want to fiddle with making a circuit to
> interface with the RC stuff.
>
> ON Semi has a decent data sheet on the chips to make a controller.
> https://www.onsemi.com/pub/Collateral/MC33033-D.PDF
>
> I think that there is so little data on motors and the prices are so
> high, that they are still not prime for this market. I just can't
> imagine spending $85.00 for a tiny motor, and then another $85 for a
> speed controller and still have to do something to make it work. I
> currently think there are easier solutions, but will be happy to be
> shown where I'm wrong.
>
> Dave