6dof motion platform ‘lite’
Hello everyone.
I am looking into building a 6dof motion platform for use with VR headset (DK2 on the way) for racing and flying simulations, (and hopefully Star Citizen), and would like to hear your thoughts on 6dof simulator with levers.
The simulator needs to be able to lift about 100Kg of weight, and I’d like to have 7-10 cm of movement.
I have been looking for existing 6dof concepts, and so far merchan-e concept with 6 wipers seems like the most cost effective way to go
https://www.youtube.com/watch?v=FfuxC_f87UI
I have seen a lot of simulators with motor arm connected directly to the push rods and the platform.
According to ebay:
“it is NOT recommended to put weight directly on a gear motor's shaft! An excessive radial bearing load may damage a motor's gear box quickly! It is always safe to isolate the load by introducing a pulley or sprocket system."
http://www.ebay.com/gds/How-to-Buy-the- ... 002/g.html
What do you guys make of it?
The way I see it,
Wiper motor without lever:
Wiper motor with lever:)
Similar concept has been used a lot with 2dof wiper simulators (seat balancing on a pivot point).
I plan to add 6 levers (seesaws), one for each motor, with 1 to 3 ratio so motors only have to lift one third of the platform weight.
This is what the levers and wipers might look like;
Would it be better for motors if the weight of the platform is balanced by a counterweight on the longer side of the seesaw?
How would the change of momentum affect motors?
Here is a rough model of the entire simulator:
(Dimensions and scales are not accurate)
Engines:
I really like characteristics of these worm drive motors:
http://www.motiondynamics.com.au/worm-d ... orque.html
Except shipping, 6 motors cost ~$650, shipping cost $360- 430 for UK
I’d be very happy to hear experiences from someone who has these motors.
With 1/3 sesaw ratio, 6 of these motors would have to move about 33.3Kg (100Kg/3)
Motors would lose 2/3 od their effective speed to about 50-60 RPM, which I thing should work great.
Has anyone tried running these at 24V?
How much power would they use, and 24V and how hot do they get? how long can these motors run in one go?
To power these I’d be getting one of IBM server PSU for 12V (or two for 24V)
These PSU’s are built to last and particular model outputs 147A from 12V.
http://www.ebay.co.uk/itm/IBM-BladeCent ... 5afdd59381
Electronic:
Thanos seems to be doing a great job with 6dof electronic boards so that's what I'll be getting
Looking forward to your thoughts.
Thanks,
Tino.