[simpits-tech] phidgits + Building Guages

[Rochester, Craig]

For those like me that have limited machine shop skill/equipment, miniature
timing belts and pulleys are more forgiving to use:
http://www.mcmaster.com/catalog/108/html/0901.html
<http://www.mcmaster.com/catalog/108/html/0901.html>
http://www.mcmaster.com/catalog/108/html/0904.html
<http://www.mcmaster.com/catalog/108/html/0904.html> 

Craig R.


		-----Original Message-----
		From:	Gene Buckle [mailto:geneb@deltasoft.com]
		Sent:	Friday, October 25, 2002 10:07 AM
		To:	simpits-tech@simpits.org
		Subject:	Re: [simpits-tech] phidgits + Building
Guages

		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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		> page.  Thanks!
		> >
		>
		>
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