Re: servo vs stepper

That is exactly what I thought as well. I'm not an electronic
engineer so what does it mean "Continuous" and "Peak"? It sounds to
me that the motor can change it's torque when needed (up to 430 oz/in)

All I know is I don't have any problem running my Drill Mill. Have
you looked at my movie on my web site?? In the last part of the
movie my Mill is running that finish cut at 131 IPM!!!

I machine at standard feed rates that are calculated by my cutter and
the RPM of the spindle. I can't get real fast cutting feedrates
because the Drill-Mill does not have a fast running spindle. Don't
most CNC mills run the spindle at 5000 to 10000 RPM??? I know that I
have pushed the feedrate too much and broken a 3/8 EM and the motors
did not stall at all.


Jeff Davis
http://www.homecnc.info

--- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> Hi Jeff,
>
> Thanks. I would have thought you'd need more HP or continuous
torque
> then that. 1700 RPM and 50 oz/in continuous torque. What feed and
> rapids are you getting? If I've read the label on my daisy-wheel
> printer motors correctly, I can get about 85 oz/in torque, and I
think a
> similar RPM. So they're STILL a possible for a Mill/Drill
conversion.
> Anyone interested in my Minerta servos? I'd trade for some Gecko
> G320/340's!
>
> Also I might be interested in a set of ball screws and bearings, if
you
> are going to offer them. I've got quite a way to go to be able to
start
> a retrofit. I'd like to get a set of Gecko's next.
>
> Alan KM6VV
>
>
> jeffdavis516 wrote:
> >
> > Hi allen,
> >
> > Yes they are the same ones c23L55W30 430 Peak oz/in, 36VDC, I
have
> > USDigital E2-250 encoders on them. I am running the servos at 2:1
> > ratio with .631 Ball Dia X .200 Pitch Ball Screws.
> >
> > Jeff Davis
> > http://www.homecnc.info
> >
> > --- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...>
wrote:
> > > Hi Jeff,
> > >
> > > Which motors are they? Litton has a web site with motors, are
they
> > > here? I'm interested in the other spec's for the motors
(continuous
> > > torque), and what gear ratio/ballscrew you choose.
> > >
> > > http://www.litton-ps.com/Motors/c23series.html
> > >
> > > Alan KM6VV