2DOF compact race / flight with Oculus Rift

When are we going to see some movement reko ? im Very much curious to see it in action.


CSW mod Stats,

Stock motors @24VDC pulled 8.5 pounds@~5.38"R. So about 3.8 lbs./ft. (5.2 Nm) of torque.

With the Buhler motors @24VDC pulled 14.5 pounds@~5.38"R. or 6.5lbs./ft. (8.8Nm).

Buhler motors @30VDC pulled 18.25 pounds@~5.38"R. or 8.2lbs./ft. (11.1Nm).

New test:

Buhlers @40VDC pulled 21.25 pounds@~5.38"R. or 9.53lbs./ft. (12.9N•m)

what can I say, I am a slow poke. haven't abandoned the project, now that summer is over hoping to put more time into it.

Good to hear you haven't given up reko, we'll be here waiting....No worries.

upper part of the frame is almost completed. decided to use some hardware from playseat evolution since i need to be able to adjust between different users. figured out the balance point for the u-joint attachment based on my weight (the heaviest user), etc. any suggestions on the distance between the lower frame and the upper frame? I am thinking around 10-12"? thanks

And allowing for forward swing of the frame, make it a low as possible. Unless you actually are going to have 10-12" of angle of swing of the frame, dont go there with a high pivot. Cut it and make it as low as possible.

so keeping in mind that this will be used as a flight simulator as well, should I provision for say 15 degrees forward tilt? Once I have the angle it is very easy to figure out the minimum length

thx

15 deg forward!, so that 15 deg from centre? I hope those motors are powerful enough to bring you back to centre.

Here is the link to the motors I am using:
http://www.xsimulator.net/community/threads/2dof-compact-race-flight-with-oculus-rift.6179/page-5
So what is a typical tilt angle from a vertical position that I should base my calcs on, sounds like 15 degrees is too much. Is there a rule of thumb?

Maybe shoulder mount, but im doubtful. I did a full frame shoulder mount sim for a mate ages ago and we used 60:1 boxes with 80mm levers, that equated to 9 deg from centre up or down. 18 deg total.
From what I have read, with the rift, you dont need big angles as its more immersive than screens.
At the least, if they are 60:1 boxes on them you MIGHT get the angles, but id say you would need a lever of 160mm, and thats long and may not lift the whole frame, even at shoulder mount.

ok, so I did some rude calcs based on 60mm CTC levers. best case scenario, I won't be able to get more than 7 degrees for a total of 14 degrees. i think this sounds like a plan to start with, will have to adjust if needed.

I think yo may find thats a LOT once you are in motion especially with a rift.

probably a stupid question, but what is considered to be a "neutral" position for the motor levers on the shoulder mount rig, 45 degrees angle?and is the range +/- 90 degrees? thx

Thanks for the link. And the starting point is perpendicular to the rod? Thx

First problem, the motor shaft is too close to the frame. At that lever position, unless you plan to only have very small travel of the lever, you are going to have problems with torque of the motor.
It really needs to be more horizontal. at centre point, not up like that. (14 sim builds later)

the motor lever is supposed to be level with the frame, not at an angle. Id suggest mount the motors on a piece of board and make or buy brackets for them.

Secondly, how long a lever are you planning (I probably missed it)

@bsft, i was thinking of extending the shaft so it clears the frame as shown on the attached picture. Alternatively, i could mount the motor so it sits on top of the frame so i don't need to extend the shaft. Lever length was thinking 60-70mm CTC, your drawing shows 65mm so I could go with that. thank you for your help

@reko19 . That would work. The only concern is the extra load on a long bolt , but with a high tensile bolt it should be ok.
Just a question , why a 65mm CTC lever ? Is 45-50mm too short?

The lever in question is actualy on a seat mover, and yes you could do that, however, with teh extra long bolt, you may bend it.

I actually decided to re-position the motor so I don't have to worry about bending the bolt, not a big deal. I don't Know why I picked 65mm CTC. @noorbeast gave me a lot of on line references, I might need to dig through it. But most people seem to be using 60-65CTC, isn't bigger always better ?