RE: [CAD_CAM_EDM_DRO] B: Brushless motor

I am trying to remember correctly, but I believe you were using the
Proxxon tool as your spindle and that is the DC motor we are talking
about?? If so it is no wonder you are burning them out. It is a nice
tool, but it was never intended to run for hours straight. Yes a
brushless motor would be an major improvement, but as you said they are
expensive and beyond your budget. We are trying to point you to
solutions that will give you reliability at a cost you can afford. If
all you want is a brushless than go get the money and be happy.

Now if you are willing to compromise there are lots of other solutions.
First question is if you are dumping the Proxxon tools as your
spindle/motor what are you going to use for a spindle? You keep saying
you want a brushless motor, but you have not talked about how you are
going to connect it to a tool bit.

If I were you and I needed a motor and spindle that would be reliable
and reasonably priced I would either go with a Sherline headstock with
motor and controller set up for 10K rpm. It is a straight bolt on and
ready to run unit including a VERY sturdy spindle. It is not cheap at
about $290 at discount in the USA, but it solves your problem as soon as
it arrives and it will run all day long. The new Sherline motors have
externally replaceable brushes so if they do burn out you can have it
fixed and ready to go in about 5 minutes. Now if you do have a spindle
already then just get the Sherline motor and speed control. It will save
you about $100 without the spindle.

Tim
[Denver, CO]

> -----Original Message-----
>
> Well,
>
> I'm sure I ran the motors longer then they were intented to,
> and that's why they melted down. I did'nt use any of them for
> more then 10 hours, before they died. Granted, the first one
> died because the endmill got stuck, and I did'nt notice till
> it had been hold tight for around one hour. The other, the
> bearings died. It's still running, but very slow and noisy.
>
> So I was thinking that a used brushless would help me.
>
> --Michael