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  1. #1
    150+ Forum Groupie Roland's Avatar
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    New 3doF platform construction

    Last couple of months I have been working on a new type of 3doF motion platform construction. The idea is based on Inmotionsimulation 3doF type, but I made several modifications, to achieve cheaper motor drive system with fast reaction speed and integrated weight balancing scheme.
    A bit more complex than my previous platforms, so I have first build a wooden 1:2 scale model to test the functionality, which looks quite OK.

    The final 1:1 unit will be build from metal, aiming for 200kg payload.

    You can see the 1:2 scale model in action at:

    http://www.youtube.com/watch?v=NtzIz...layer_embedded

    I will also show this unit at upcoming FSweekend in Lelystad, the Netherlands
    (This one fits in my car)
    RR

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    Thumbs up Re: New 3doF platform construction

    This is very exciting stuff! Thanks for sharing.

    Joe

  3. #3
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    Re: New 3doF platform construction

    Cool!

    Neat, compact design - can't wait to see the full size version.

    Looking the motion it looks a wee bit "stickier" than your other full size platforms so far - have you had a chance to analyse this out yet? I guess it's in the servo loop tuning?

    Ian

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    500+ This must be a daytime job autocadplease's Avatar
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    Re: New 3doF platform construction

    I really appreciate you sharing this!
    Grant D.
    Nelson,B.C. Canada
    Win7 32bit, FSX, PM Boeing, TH2GO, GEX, VoxATC

  5. #5
    25+ Posting Member flymo001's Avatar
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    Re: New 3doF platform construction

    Roland....what can I say......EXCELLENT!!!!! can't wait to see the 1:1. Saw the other base in action last year....that was fantastic, so will say hello this yr. See you there!

    Cheers, John P

  6. #6
    150+ Forum Groupie Roland's Avatar
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    Re: New 3doF platform construction

    Ian,
    The "stickier" motion is caused by the insufficient gear ratio and the rather coarse cogging characteristic of the motors. I build this unit mostly from scraps out of my junkbox, so could not select optimal components. The real-size unit will have bigger gear ratio, and uses low-cogging motors, so should be fine.
    I will also use belt-pulley for the motor-1st gear transfer, to get rid of the chain induced noise.

    John,
    See you this weekend at Lelystad!
    RR

  7. #7
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    Smile Re: New 3doF platform construction

    Hi Roland just to say as a long time follower of your work , you never cease to amaze me with the stuff you do , always very much with the homebuilder in mind and it all comes with great and easy to understand assembly and methodology , so just my way of say keep up the great work those of us building or hoping to build motion platforms could not find a better Combination in your ideas and Ians Software we definatly need guys like you ..

  8. #8
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    Re: New 3doF platform construction

    Hi Roland, If have looked on the build for fun site,
    I`m also interested purchasing the 40SPU-1 drive system card with the speedcontrollers,
    Do you have experience with lower voltages on the speedcontrollers MDo3,
    I can buy actuactors with 2250 newton(about 225 kgf) 38mm/sec at 12 volts 20 amp, but the controllers operate at 24/36 volts,
    But I`m not a electrician ,I can put a battery in a radio and thats it
    Will it affect the speed or working capacity
    greetz
    ps I will attend the fair also

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    Re: New 3doF platform construction

    Hi Kermit,

    I'm sure Roland uses drive hardware of his own design and not my 40SPU-1 cards etc, however I can answer your question on the MD03's. The manufacturer originally advertised them as 50V controllers but recently "clarified" their ratings at 24V. I have used them at 36V for some time without problems. However you can power them with voltages as low as 5V if you want - the voltage output range is then simply limited to that maximum.

    They will operate with a 12V motor side battery supply.

    A quick note on your actuators - 38mm/s is on the low side for a motion platform drive. Some I've built were at 400mm/s. If you only want slow speed movement then you might be able to use slow actuators - but this then rules out things like touchdown bumps or other vibration type effects or faster impulse type movements.

    Ian

  10. #10
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    Re: New 3doF platform construction

    Hi Ian,
    thanks for your reply,
    I have already contact you thru mail regarding the actuators ,
    I had just another question regarding control volts and main motor power
    greetz

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