[simpits-tech] Re: Simpits-tech Digest, Vol 27, Issue 10

[K :)]

Unfortunately I don't have the technical savy to find the memory locations for each game/sim.  Thats the major reason I'm going for the joystick approach.  I'm going to mount the platform on a central pivot point with actuators at one end and one side.   I am going to spend the necessary time to try and get the pivot point as centered under the mass as possible so most of the weight will rest on the pivot.  The actuators shouldn't have to work too hard to tip it each way then.  I'm not shooting for dead-on realism, I just think my favorite arial shoot-em up will be more fun if the platform moves.  I think putting in the washout function will help with the sync problem because the platform only needs to move at the start of a direction change and then will go back to center until the next input. 

 

It's using the Cougar stick that is the major hold-up.  If I was using an old gameport type stick I could just read the values directly and off I'd go.  But the USB stick is new territory for me. 

Date: Wed, 9 Nov 2005 12:28:43 -0800 (PST)
From: "K :\)" 
Subject: [simpits-tech] Re: Simpits-tech Digest, Vol 27, Issue 9
To: simpits-tech at simpits.org
Message-ID: <20051109202843.3779.qmail at web34308.mail.mud.yahoo.com>
Content-Type: text/plain; charset="iso-8859-1"

Yeah, I do need to run the platform from raw joystick data because I want to able to run several different games/sims and still have the washout work for all of them. I'm building it for for just pitch and roll (though yaw may be a possibility later). The cockpit will be rather generic, but I have a Hagstrom keyboard encoder so the switches, etc. will work and it is easily reprogrammed for different games/sims. 

K :)


Message: 2
Date: Wed, 09 Nov 2005 18:29:19 -0500
From: cyplesma at aol.com
Subject: Re: [simpits-tech] Re: Simpits-tech Digest, Vol 27, Issue 9
To: simpits-tech at simpits.org

you're just asking for a lot of trouble doing it that way.

I can appreciate want you want to do but.....

the problem will be keeping the sim in sync with the platform. you'll 
have times when the sim is banking right and belive it or not your 
hardware will put you in a left bank.

then there's the trick of keeping the stick's two different output's in 
sync with each other(pot dead spots, won't happen right away but after 
a couple of month's it'll start). which can get very different then 
just the sim and cockpit positioning software do to the same thing even 
with same outputs.


you'll be better off getting your positioning software to check right 
memory locations for each sim, set that info up in some type of config 
file. personnaly I'm still working on this kind of thing myself, but 
it'll reduce headaches later.


Message: 3
Date: Wed, 09 Nov 2005 19:25:18 -0600
From: Cris Harrison 

Subject: Re: [simpits-tech] Re: Simpits-tech Digest, Vol 27, Issue 8
To: Simulator Cockpit tech list 
Message-ID: <4372A17E.1090806 at phoenixcomm.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

what are you going to do about moving the 'platform' you can pull out 
the g loading but you might look at taking accelerations vectors (pitch, 
roll and yaw) and using those ie if you have no accel then dont do 
anything and really you have to work backwards but anyway good luck
BTW check out my NOTAM
www.phoenixcomm.net/~phnx2000/sim/notams.shtml and READ RFC #1
good luck...
Cris Harrison
btw you need 6 liner actuators.. 2 per leg mounted in a 3 pairs
each pair mounted 120deg around the base...
looks like a papson chair base....
and remember to get the G you need lots of power ... air cyliners might 
be better and you prol whant a strok of 12" at the min...

K :) wrote:

>
> Anybody know an easy way to get joystick positioning out of the
> computer and direct the data to a serial port ?
>
 I am building a motion platform sort of like the one Jim in NZ did
> except I am going to be using electric linear actuators. The
> problem I am having is that my joystick is a USB Thrustmaster
> Cougar and I am having trouble getting the joystick position data
> out of the computer that is running the sim to the computer that
> runs the platform. Any ideas will be welcome. I'm down to
> looking for ways to physically attach another set of pots to the
> stick (an ugly solution if there ever was one)
>



		
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