Re: Baldor spindle motor as servo motor 4th axis

I would have to add a continuous fan for cooling. Looks like it has a
field supply. Is it really feasible to find a servo amp for this
voltage? or would I be better off just adding another servo motor. We
already have a second motor hanging off this lathe that could be
replaced with a servo. I really would like one motor to do both tasks
if possible.

Armature Voltage: 180
Field Voltage: 200/100
Full Load Amps - Armature: N/A
Full Load Amps - Field: .6/1.2

Thanks
Keith

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Bob Muse" <mtebob1@s...> wrote:
>
> The only thing that I can think of is that a true servo motor is
designed to
> produce it's rated continuous torque at any rpm from max all the way
down to
> stall without overheating whereas your baldor probably needs to be
turning
> at some minimum speed for the fan to move enough air for cooling.
If this
> were to turn out to be a problem you could always add a seperately
powered
> fan.
>
> As for the amp, you need to take into consideration the voltage and
current
> specs for the motor. If it has a 180 volt armature, the gecko won't
do it.
> Also you may need a field supply if it is not a permanent magnet field.
>
> Bob
> ----- Original Message -----
> From: "Keith Clark" <mail@t...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Saturday, January 14, 2006 6:27 AM
> Subject: [CAD_CAM_EDM_DRO] Re: Baldor spindle motor as servo motor
4th axis
>
>
> > I guess this idea begs the question - what is the difference between a
> > DC motor and a servo motor? Is there something about a DC servo motor
> > that makes it different that taking a DC 1750 3 hp motor and adding a
> > servo amp and encoder?
> >
> > thanks
> > Keith
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Keith Clark" <mail@t...>
wrote:
> > >
> > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Bob Muse"
<mtebob1@s...> wrote:
> > > >
> > > > Hi Keith
> > > >
> > > > Your 3hp DC motor can function as a servo motor with the addition
> > of an
> > > > encoder and a servo drive or amp as they are called. Is there
some
> > > > reduction (belt or gear etc) between the motor and spindle?
> > > >
> > > > Bob
> > >
> > > Bob,
> > >
> > > You said the magic words! Making that motor a servo would be great!
> > > Could it then function as a spindle motor with controllable rpm as
> > > well as a servo motor 4th axis motor?
> > >
> > > There is an available encoder for the motor. Yes there is a belt
> > > drive that I need to convert to a cogged timing belt and pulley
drive
> > > system so I can customize it to whatever will work. Is the
Gecko 340
> > > a servo drive that I would use?
> > >
> > > Thanks
> > > Keith
> > >
> >
> >
> >
> >
> >
> >
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