Best Place to Start for a 6DOF Prioject

[MrKarter77]

Hey Guys
Im very new here, however i have been wading through the different platforms and project that people have been making and throughout research on it (could be my bad searching as well) i have yet to come across a "beginners guide to 6dof" so to speak.

So what i want to create, is exactly that.

I have some designs and ideas in mind, and have started designing my platform. However i am at a standstill on where to go engine wise.

I have gathered that i will need these items to make it work

6 x motors
6 x inverters
Controller Board
6 x potentiometers
6 x pushrods (arms to attach motors to platform) i was looking at arms from a car steering (tie rods)

and the obvious extras such as construction materials, and cabling etc.

What i would like to know, is for a home system, is there a reasonably cheap yet still effective motor solution for this?

With your help, i want to create a design for the home sim, that i can upload to help people in a similar start point that i am in.

[MrKarter77]

PS, Would this motor spec work?
Brand
WEG Motors
Model Number
00118EP3ER143TC-W22
HP
1 HP
RPM
1750
FRAME
143T
VOLTAGE
208-230/460 V
PHASE
THREE
FREQUENCY
60 Hz
ENCLOSURE
TEFC
APPROXIMATE WEIGHT (lb)
37
FEET
NO
TERMINAL BOX
LEFT
FLANGE
FC-149
RATED CURRENT
3.18-2.88/1.44 A
LOCKED ROTOR CURRENT IL IN
6.8
LOCKED ROTOR CURRENT
19.6/9.79 A
LOCKED ROTOR TORQUE
2
BREAKDOWN TORQUE
3
EFFICIENCY 50
78.5
EFFICIENCY 75
82.5
EFFICIENCY 100
82.5
POWER FACTOR 50
0.6
POWER FACTOR 75
0.72
POWER FACTOR 100
0.79
SERVICE FACTOR
1.25
INERTIA KGM2
0.00384 kgm
INERTIA SQ FT LB
0.09112 sq.ft.
LOCKED ROTOR TIME
20 s
NOISE LEVEL
51 dB(A)
-
-
ALTITUDE
1000
DUTY CYCLE
S1
AMBIENT TEMPERATURE
-20C - +40C
DEGREE OF PROTECTION
IP55
NO-LOAD CURRENT
1.40/0.700 A
INSULATION CLASS
F
FULL LOAD TORQUE NM
4.01 Nm
FULL LOAD TORQUE LB FT
2.96 .ft
SLIP
0.0278
DESIGN
B

[MrKarter77]

The platform design i am working on (note that it is really early, however i welcome any input from experienced simmers

I am basing the main structure off 50X3 SHS

[MrKarter77]

Ok, (this seems dead) however i have been tweaking ideas, and asking around, and seeing how i have full access to a fab shop, and people nearby that can help with hydraulic/pneumatics. i thought i would go all out.

Im using a design courtesy of Grabcad. with a few tweaks etc.

With that i need help picking the right parts, and actually planning the movement of the system.

Still hoping to get a beginners guide, and learn alot in the process.

From what i have calculated i need around 23-24" of travel X 6 hydraulic actuators (anything to look for here?)
and the plumbing, a pump/motor and the switching mechanisms.

Where i am stuck, is how to piece it all together, (ie what electronics, things to look out for etc)
Can anyone here help?

[tronicgr]

I think you should look into AC motors and VFD inverters. They are much more safe than hydraulics and the response and power you get out of them is worth the investment. You can see some examples of DIY platforms made with that kind of motors here: http://motionsim.blogspot.com/

Neither less to say that you can use such AC motors platforms for both Flight or Racing simulation.

The motor specs you posted here will work. A bit oversized I have to say though... unless you load on the platform is about 800-900kg!


Best Regards,
Thanos



Ps. If we take some more time to reply some time, just consider that some of us may not have free time available the same day!

[MrKarter77]

I think you should look into AC motors and VFD inverters. They are much more safe than hydraulics and the response and power you get out of them is worth the investment. You can see some examples of DIY platforms made with that kind of motors here: http://motionsim.blogspot.com/

Neither less to say that you can use such AC motors platforms for both Flight or Racing simulation.

The motor specs you posted here will work. A bit oversized I have to say though... unless you load on the platform is about 800-900kg!


Best Regards,
Thanos



Ps. If we take some more time to reply some time, just consider that some of us may not have free time available the same day!

Thanks for that, sorry if i keep adding more, just as i find things i think are worth posting i update, i have almost finished my design and and about to start fab for the actual cockpit part.

and for my particular sim, i am going a little overkill, as i plan to make it alot closer to the car we drive, and may end up with 1/4 car on it, when you add door, rollcage sections etc.

When you say safer than hydraulics, are you meaning physical safety? or for ease of use/setup?

[tronicgr]

Hydraulics are not safe for home environment. Imagine that placed in your living room and a valve breaks leaking oil with hundreds psi. It can cause burns and other injuries! Let alone the mess that you have to clean up!

On the other side AC motors are very safe, and with enough precautions (electrical grounding and physical guard rails perimeter) can be used anywhere. I just happen to had to change the A/C unit in my house and realized that it is plugged in 220v outlet, and surprised me as I live in US and all outlets are 115v! So I can now plug my Inverters even in the living room!! The 220v outlet is rated for 25A so I can easily use six 0.75kW motors on it!!!

Btw I added some more information about my last post on my blog that it might be interesting to you: http://motionsim.blogspot.com/2013/07/rolf-6dof-platform-video.html

Thanos

[Riton]

+1
I was one of the first here to have AC motor, with Scottlolo, it's six years now since the time we have no problem.
hydraulic, you must master it.
For an equivalent result you need a big budget, proportional valves ......

[MrKarter77]

Ok, that sounds like it might be the way to go then.

I just get very confused when looking at the motor information.

Can you point me in the right direction when looking at what motors to buy?

EDIT: im in australia, where our power is 240V AC
EDIT EDIT: i found a place i can get these motors http://www.guanglu.com/See.asp?id=155 (gmyl 802-2) for $100 each (AUD) would they have enough balls to work?

[tronicgr]

I just get very confused when looking at the motor information.

Can you point me in the right direction when looking at what motors to buy?

You can see here motor - gearbox - VFD inverter set example: http://motionsim.blogspot.com/2013/05/6dof-platform-photo.html
Just keep in mind that the AC motors MUST be 3phase. The VFD inverter is 1phase and internally converts to 3phase output.

EDIT: im in australia, where our power is 240V AC
EDIT EDIT: i found a place i can get these motors http://www.guanglu.com/See.asp?id=155 (gmyl 802-2) for $100 each (AUD) would they have enough balls to work?

No. They are 1phase motors! You need 3phase as in the above example or else you will not be able to change direction of rotation of the motor.

Regards,
Thanos