Showroom Grigory’s 6DOF 24V DC

Yes I have altered all my settings for axis so when I brake the seat goes back and pitches down and when accelerating it goes forwards and tilts up. Also with roll and pitch use totally different settings again to get the COG to around where my chest is. Took me ages I did post my settings on my build thread you can try them but you may need to change the actuator axis numbers if they are different to mine maybe somewhere to start from anyway With sway I also have it move sidewards but also tilts slightly

Thanks! I'll try your settings on Saturday

Impressive stuff @Grigory , well done , now the fun really begins , may I ask how you got over the Autotune issue with that last actuator ? I had similar problem with my original Electric Wheelchair motor gearbox 6DOF and it drove me nuts LOL

Well, the solution was to buy replacement limit switches. I did not even have to install them, the fact of purchase seems to have fixed the problem
It just worked )

Finally tuned it more or less. Seems to be working and it does not disassemble itself, not immediately at least.

Oh, it feels so good to finally ride it after so many weeks of building and making mistakes and discovering new issues and thinking whether it was actually all worth it!

Now I need to actually learn how to drive

Awesome dude looks loads better and looks like you having fun

Unfortunately it appears that my vestibular apparatus is not compatible with Oculus on the motion rig. It gives me terrible motion sickness, I become all green and sweaty in just 30 seconds.

So, all past weekend I worked on upgrading the sim for triple curved monitors. I have not yet tested the cockpit in motion, but even without movement it feels good.

Does not really surprise me, badly setup motion will bring on motion sickness worse then no motion in VR. Correctly setup motion will reduce motion sickness - I have actually tested and proved this . Eg. You have some weird stuff happening in the video that shows motion Eg what is that strange yaw motion? But it is your sim/body, so whatever works for you .

That rotational movement comes from traction loss signal. Can you clarify what exactly looks strange to you? Is it too much in amplitude or direction is reversed? Something else?

If you want to use traction loss on a 6DOF you should be only driving the back two actuators no others - it is not a yaw motion. Get that right and then post another video (the yaw is currently just overwriting everything) which shows the screen as well if you want further critic.

Thanks! I will adjust this next time I get to the rig.

Recommend you have a read of this - https://en.wikipedia.org/wiki/Six_degrees_of_freedom then set your sim up to work like that (forget yaw and only setup small amounts for roll and pitch (5%) as they will fight sway and surge) test each DOF separately with the others set to 0 % . When happy mix them all back together. For traction loss just the back should step out when you lose traction at the back of the car so when you turn into a right hand corner and lose traction then the back of the rig should step out to the left. Get this all correct and then try VR again. Waste of time building a 6DOF or any sim if your profile is a dogs breakfast - can take along time to get it right, but it is worth it.

Triple screens installed on the motion rig.



The thing needs some lubrication, apparently

Looking good matey and yes sounds a little squeaky lol

Thanks

I thoroughly sprayed it with WD40 yesterday, so the squeaks disappeared.

However there is another problem with motors getting very hot after longer use. After 4 hours the motor bodies became very warm and the shafts were so hot that I could barely touch.

Strangely, the radiators on sabertooths are absolutely cold with fans never switching on.

There is also an interesting thing happening with the power consumption.

I have six 24v motors with nominal peak current of about 30A. Looking at these figures I used four 960W interconnected meanwell power supplies with two serially connected 30Ah 12v batteries in parallel to the supplies -- to take care of reverse currents from the motors and help with power peaks.

As my mains lines are limited to 16A and the power supplies can consume about 6A each, I made two 220v wires, each feeding a pair of supplies.

Now, yesterday I used a wattmeter to check the actual 220v current consumption of the rig and discovered that the four power supplies together only take about 3-4 amps with occasional peaks to 5-6 amps. The battery had about 23.5 v after several hours of riding, so it doesn't look as the rig is mostly taking power from it.

I just drilled holes in the bottom and top of my motors and then put some 80mm fans on the bottom of each of the fans, my motors after hours and hours get warm but not hot. It helped massively as the motors are sealed shut so no fresh air is getting in as they are designed to be outside in mobility scooters or wheelchars. Maybe something to think about doing

Yes, I may need to do this. I just need to make sure that I do not damage something inside the motor when drilling.

I'm also a bit concerned about sucking dust inside the motor if I make holes and mount fans. Do you think this is something to worry about?

No no no dont drill them when they are in one piece lol !!!

You need to take the to pieces first

https://www.xsimulator.net/communit...60s-was-mms-and-arduinos-osw-wip.6948/page-37

some pictures there how I did mine