Re: Lowering Gecko Voltage

Sounds like a great plan. I already have a 320 sitting around not
doing anything so I will just use it. I appreciate your help.

--- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...> wrote:
> Gary,
>
> That changes everything. I was laboring under the misconception
you
> needed to have a power output of +/- 10V. Now I understand what
you
> are looking for.
>
> The equivalent of what you need (PID error voltage), exists as a 0
to
> +5 voltage in the G320. This is the input to our pulse-width
> modulator. It should be no big deal to take this voltage, offset
it
> by -2.5V and amplify it by 4 to get your +/- 10V control signal. A
> single op-amp can do that.
>
> If you are not averse picking this signal off of an internal
surface
> mount component to your circuitry, I can probably find a G320 with
a
> fried power section (thoughtfully provided to me by someone else),
> that I can let you have for free if you send a stamped, self-
> addressed dealie I can drop it in. You know the size of the drive
so
> make it appropriate.
>
> Mariss
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., "garyswindell" <gds@m...> wrote:
> > The actual voltage to the piezo is around 500V the controller
board
> > needs the 10V input and it takes care of stepping it up.
> >
> > --- In CAD_CAM_EDM_DRO@y..., "studleylee" <indigo_red@q...>
wrote:
> > > I agree op amps( with beefed output stages) would do better
for
> > > precise positioning with piezos, but now he's got to design
the
> amp.
> > >
> > > Also what piezo motor only needs +/- 10 volts. Is this going
> direct
> > > to the 'crystal' or is there a drive involved that is
contolled
> by
> > > the +/-10v that you wish to produce from a Step.Dir controller.
> > >
> > > Not an expert on piezo positioners, just tossing out ideas.
> > > -Lee
> > >