Re: [CAD_CAM_EDM_DRO] Re: SPINDLE speed controller, collets

Hi, most treadmill motors are permanant magnet at least the ones i have
seen. looking at the speed control books i have here, universal motors have
two types, shunt wound and wound field. one runs on 1/2 voltage for the
field the other full voltage for the field. if the two sets of winding wires
a pair for field and a pair of wires for the armeture are brought to a speed
control, control should be easy. now if the motor contains electronic
controls inside the motor or tool that is a different problem. there are so
many new electronic controls some motors are brushless ac, some brushless dc
and the list goes on. cul brian f.

----- Original Message -----
From: "Alan Marconett" <KM6VV@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, June 07, 2006 6:07 PM
Subject: RE: [CAD_CAM_EDM_DRO] Re: SPINDLE speed controller, collets


> HI Dave,
>
> Certainly sounds promising! Would you be willing to try a controller on a
> trim router? What trim router do you have, maybe I can look up the info
on
> it, and see if the motor is similar.
>
> I found a Dart 125 manual; it says: "The control is designed for DC
> Permanent Magnet, Shunt Wound, and some Universal (AC/DC) motors in the
> above HP ranges." Unfortunately, the DeWalt says AC only (in its manual,
I
> think it was), rather then saying AC/DC. Hence my concern.
>
> I've got emails into both DeWalt and Dart, maybe one of them will answer!
>
> The Dart 125 certainly looks like it can be controlled by PWM from a PC or
> PIC. Something I want to try... after I get it controlling a motor.
>
> I'm not familiar with "treadmill motors", I assume they're AC/DC
"Universal"
> (series wound?) motors? You're probably right. How different can they
be?
>
>
> I did find a few trim router motor controllers, Amazon.com is selling the
> Grizzly model. I've advised my wife that it would be a suitable present
to
> receive from one of the kids, or HER!
>
> We'll see.
>
> Alan KM6VV
>
>
> >
> > >
> > > HI Dave,
> > >
> > > A Router Speed Control! Why didn't I think of that! Probably
> > because I'm
> > > not a wood worker!
> >
> >
> > Well, If I'm not mistaken, you have a DART 125 controller in you stash
> > of stuff. that can be fed from a pot, or a micro or PWM from a PC
> > or even RS485 (or some such) from software.
> >
> > I have a couple HF trim routers, both plastic bodies and the older all
> > aluminum bodies.
> >
> > I have been using the DART style on a treadmill motor on my lathe for
> > some time now.
> >
> > I have not hooked one up to a trim router.
> >
> > I guess I would like to know if there is really any difference between
> > a trim router and a treadmill motor that would make an SCR driver
> > work or not work.
> >
> > Dave
> >
> >
>
>
>
>
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