Re: Geckodrive

So Mariss, Is your G100 going to have an advantage using it
with a servo system? or is it primarily going to be for
use with steppers. There are a lot of servo guys out there
that need the G100 advantage in there servo systems.
What can a G100 do for a servo system?

Scott





--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mariss Freimanis"
<mariss92705@...> wrote:

>
> A truly unstallable motor would have to deliver infinite power.:-)
>
> I call this "the unstallable step motor project" because of its
> practical implications. An open-loop step motor has only two options,
> run or stall. If stalls while work is being done then more likely
> than not that work will be ruined.
>
> This is also true for ordinary servo drives. If overloaded, they
> develop a following error; if the following error is large enough,
> the drive faults-out and the motor stops. Same result.
>
> The "unstallable" step motor will just slow down when overloaded. The
> G100 will slow the other axis motors down by the same ratio and your
> work will be unaffected. You may not even notice it until after you
> oil your machine.:-)
>
> By this definition the motor is "unstallable" in practical terms.
>
>
> Mariss
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham Stabler" <eexgs@>
> wrote:
> >
> >
> > It seems there is some confusion because it is not unstallable
> because
> > the system can beat any load and carry on regardless rather it rolls
> > with the punches. If something loads the motor such that it cannot
> > carry on at its current speed it slows to get some more torque. At
> > the limit I guess it will stop but it won't be trying to go anywhere
> > either!
> >
> > I suppose you could say the definition of a stall is for a motor to
> be
> > trying to move when it can't. The unstallable drive knows when it
> > needs to slow down to keep moving and ultimately when to give up :)
> >
> > Jack, the resonant type stall dues to the mid band stuff it not the
> > kind of stalling that is being refered to as far as I can tell. I
> > also beleive that the geckodrives deal with the mid band resonances
> > already.
> >
> > Graham
> >
>