Re: [CAD_CAM_EDM_DRO] Re: Servos and Controller boards

On Sunday 11 April 2004 05:03 pm, caudlet wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Nick Ibbitson"
>
> <pulseweld@d...> wrote:
> > Hi all,
> >
> > sorry if this is stupid question but can you build your own servo
> > controllers?, i mean is a there a circuit that can be home built.
> > I have a stepper motor system and am more than happy with it but
>
> have been
>
> > given several small-ish servos and it would be a shame not to use
> > them, they have shaft encoders already on them.
> >
> > Thanks
> >
> > Nick
>
> I don't think I would attempt to design, layout and build a servo
> motor controller. Because of the closed loop design there is a lot
> more to it than just twisting a motor with DC. How small-ish are the
> motors? Servos produce more torque for their size than steppers. Do
> you have any voltage or current specs?
>
> If these are brushed servo's Fred posted a link for his SV500 cards
> that will handle up to 5A motors and they are $65 each on quantities
> of 3. I don't think you can "stick" build them for much less than
> that even if you work for free.

I might be inclined to play with this idea some, particularly since I also
have a few motors here with encoders already mounted on them. But later,
after I get some sort of operating machinery here using steppers, and get it
going. No big rush to get to servos, but I sure ain't inclined to let them
go to waste either.