[simpits-tech] Zero point on a two needle altimeter

[Rod Dale]

No, a few years back I tried to run a stepper motor through the 32 Point
Output module but ended up cooking the board - was not impressed. I followed
Ralph's (R&R) instructions but something went drastically wrong !!!!!!
I'm only using Epic for switches/ buttons, lights/indicators and 7 segment
displays. The Gauge module only runs the moving coil type gauges now, in my
case VSI, Trim indicator, fuel gauges, wing sweep indicator. I did have it
operating the engine instruments via 555 timer circuits I built but I have
too many moving coil type gauges now and can't spare the Gauge module.
Anyway according to what I've read Phidgets will be easier to setup and
program.
Rod
----- Original Message -----
From: Matt Bailey <mattb@rtccom.net>
To: <simpits-tech@simpits.org>
Sent: Sunday, October 27, 2002 8:15 PM
Subject: Re: [simpits-tech] Zero point on a two needle altimeter


> I thought you were using EPIC for the engine instruments?
>
> -Matt Bailey
>
> Rod Dale wrote:
> >
> > Sorry, I meant that I used a stepper motor on the altimeter - not a
servo.
> > You have to modify the servo to enable  > 360 degree rotation. I haven't
> > been game to try that yet.
> > I intend to use Phidgets for all my engine instruments - next job on the
> > bench.
> > Rod
> > ----- Original Message -----
> > From: Gene Buckle <geneb@deltasoft.com>
> > To: <simpits-tech@simpits.org>
> > Sent: Sunday, October 27, 2002 11:06 AM
> > Subject: Re: [simpits-tech] Zero point on a two needle altimeter
> >
> > > > I tried that. I connected the servo to the arm that connects to the
> > bellows
> > > > but because the gearing is very fine, a quarter turn of the servo
put me
> > > > from 0 feet to 5000 ft !!!! The bellows don't move much at all. I
ended
> > up
> > > > ripping the inners out of the altimeter and connected the servo to
the
> > > > centre shaft.
> > >
> > > Rod, you might try it again under Phidget control.  With a phidget,
you
> > > can get tenth degree precision if the servo is high quality.
> > >
> > > g.
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