[simpits-tech] MarvMan and Craigo Fixed Stick Update

[Marv De Beque]

Congratulations on the lathe!  Good tool.  Todd Ferrante bought a Taig mill.
Might want to share experiences.

On 12/20/02 5:57 PM, "Craig Rochester" <johncraigroch@msn.com> wrote:

> Hey Steve,
> 
> I feel a bit awkward, albeit flattered, to be associated with Marv's work.
> :)  My tinkering and jury rigging isn't in the same class as Marv's work.
> 
> I have been busy with work and the holidays so haven't had much time to
> spend on the stick-base project.  While working with the LVDT test rig:
> http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpict
> ures/lvdtstick4.jpg
> 
> I had the idea to use an off-center bearing(cam) to convert the stick's
> displacement to a potentiometer rotation. The cam bearing is bolted where
> the LVDT would be. The cam bearing is a lot cheaper and rotates a standard
> pot . It's not as  precise as the LVDT/amp system(<0.0001" resolution), but
> it still felt good.  I flew Falcon4 around a bit. I had very similar results
> as with the LVDT: good centering, no apparent hysteresis, and very precise
> response. And this was with my crude jury rigging. The mechanism had no
> discernable play as everything is always in tension so even play in the
> shaft has no affect.
> 
> http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpict
> ures/cambearing02.jpg
> http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpict
> ures/cambearing04.jpg
> http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpict
> ures/cambearing05.jpg
> 
> It worked pretty well considering the crappy construction. But, the results
> were very encouraging.   My next step is to bolt a mounting bracket to a
> steel chair .  I need better stability for the base.  I also need an arm
> rest like the F-16.  I'll then mount transducers for both axes and do some
> real flying.
> 
> A couple of days ago, I bought a used Taig lathe and hope to expand my
> jury-rigging possibilities (my Christmas present).
> 
> Happy Holidays Y'all,
> 
> Craig R.
> 
> -----Original Message-----
> From:    simpits-tech-admin@simpits.org
[mailto:simpits-tech-admin@simpits.org]
> On Behalf Of mafsix@attbi.com
> Sent:    Friday, December 20, 2002 9:35 AM
> To:    simpits-tech@simpits.org
> Subject:    [simpits-tech] MarvMan and Craigo Fixed Stick Update
> 
> Hey Marv, Craig -
> 
> Knowing that you're probably taking a project break for the holidays, I
> thought
> it would be a good time to bug you engineering genii to see how your Cougar
> joystick base modification projects were coming..... any newzzzz?
> 
> Steve
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> 
> 
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