Re: servo vs stepper

Alan,

What I'm trying to do is offer my plans to people and if they are not
comfortable with making some of the parts or can't because of lack of
proper equipment, I was going to quote on making the parts. I have
not given any thought yet on price to produce parts but can if you
want. It's not to hard to create the ball screws if you have a
lathe. I got the ball screw material from the standard internet
sources (McMaster Carr, Reid Tool). The bearings also can be had
from (MSC or McMaster Carr).

Jeff Davis
http://www.homecnc.info

--- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> Hi Jeff,
>
> Sounds like you've got it covered fine! and 131 IMP is plenty
fast, for
> my use!
>
> I'm interested in a set of ball screws and bearings, if you are
going to
> offer them. What are the prices? Or your source?
>
> Alan KM6VV
>
>
> jeffdavis516 wrote:
> >
> > 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