RE: [CAD_CAM_EDM_DRO] Re: Is a reduction drive necessary for servo motors?

Hi Aaaron and all,

Thanks to all who answered my question. from all your answers it is apparent
that I'd have to change the mounting set-up to change to servos. This is
mainly due to the required speed reduction.

For the moment I'll stick to the steppers,

Thanks,



Peter Homann
mailto:Peter.Homann@...
Adacel Technologies Limited,
250 Bay St, BRIGHTON, 3186, AUSTRALIA
http://www.adacel.com <http://www.adacel.com>
Telephone +61 (3) 8530 7777, Facsimile +61 (3) 9596 2960
Mobile 0421-601 665

> -----Original Message-----
> From: industrialhobbies [mailto:admin@...]
> Sent: Thursday, 15 January 2004 4:29 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: Is a reduction drive necessary for servo
> motors?
>
>
> More than likely you'll need to reduce them to get the most out of
> them. It all depends on the motor. Check the motor's no load RPM
> if it's over 2000 reduce it. Work to get the RPM down into the 1000
> RPM range at the screw.
>
> Also there is an article:
> http://www.industrialhobbies.com/howto/tips/balancing_the_servo_and_th
> e_cpu.htm
> You might want to check.
>
> Thanks
>
> Aaron Moss
> www.IndustrialHobbies.com
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Peter Homann"
> <peter.homann@a...> wrote:
> > Hi,
> >
> > I'm looking at upgrading a CNC lathe that currently has 210 oz/in
> steppers
> > to servo motors.
> >
> > The servo motors are rated at just over 300 oz/in.
> >
> > The current stepper set-up is direct coupled using zero backlash
> flexible
> > couplers. The ball screws have a lead of 4mm/turn.
> >
> > As the servos appear to be more powerful than the steppers, I feel
> I should
> > be able to do a direct replacement, but have not used servos before.
> >
> > Do I need to use any gear reduction, or can I direct couple the
> servos via
> > the flexible coupling as is done with the existing steppers.
> >
> > Any help or comments appreciated.
> >
> > Thanks,
> >
> > Peter Homann
> > mailto:Peter.Homann@a...
> > Adacel Technologies Limited,
> > 250 Bay St, BRIGHTON, 3186, AUSTRALIA
> > http://www.adacel.com <http://www.adacel.com>
> > Telephone +61 (3) 8530 7777, Facsimile +61 (3) 9596 2960
> > Mobile 0421-601 665
>
>
>
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