[simpits-tech] phidgits + Building Guages

[Gene Buckle]

Frank, you don't want to convert the servo, you want to gear it 2:1(afaik)
so you get 360 degrees of gear rotation on 180 degrees of servo input.

Marv sells complete (and spectacular) gauges that do this.

g.


On Fri, 25 Oct 2002, Frank Riedel wrote:

> I ment to have seen a kink to a site where it was discript  how
> to convert a normal 180 dg servo to 360 dg....
> am i wrong ???
>
> Frank
>
> ----- Original Message -----
> From: <mysticz28@swbell.net>
> To: <simpits-tech@simpits.org>
> Sent: Friday, October 25, 2002 6:13 AM
> Subject: Re: [simpits-tech] phidgits + Building Guages
>
>
> > Gene Buckle wrote:
> > >
> > > The problem is that everyone and their brother has a neat method of
> > > driving a stepper motor, but nobody says anything about *feedback* from
> > > that motor.
> >
> > That's because steppers can't talk back (or they would be servos).
> > Fortunately for them, you talk enough to take up their slack ;)
> >
> > > This is a required feature for something like an ADI or HSI and useful
> for
> > > something like an altimeter.  THIS is something I'd throw money at.
> >
> > 1x Futaba S148 (since I have a ton of them) + 1x whatever gizmo you want
> > to control it + suitable programming... RC servos might not be perfect
> > since most can't do 360 degrees of rotation, but with the right gearing
> > it would work for most gauges that don't require multiple sweeps of the
> > needle (tach, EGT, CHT, flap pos., etc.) For HSI, altimeter, etc. it
> > would probably be easiest to get feedback from an encoder.
> >
> > Haven't we all been through this a bazillion times?
> > --
> > Steve
> > mysticz28@swbell.net
> > Jesus saves, Budda enlightens, Cthulhu thinks you'll make a nice
> > sandwich.
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