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Thread: New 3doF platform construction
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11-05-2009, 05:59 PM #1
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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Post Thanks / Like - 9 Thanks, 0 Likes, 0 DislikesMortenHa, Erich68, CrashEd, flatlandpilot, MudPuppy, autocadplease, flymo001, IanH1960, Joe Cygan thanked for this post
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11-05-2009, 06:10 PM #2
- Join Date
- May 2006
- Location
- Texas
- Posts
- 616
Re: New 3doF platform construction
This is very exciting stuff! Thanks for sharing.
Joe
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11-05-2009, 06:21 PM #3
- Join Date
- Sep 2007
- Location
- Scotland
- Posts
- 81
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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11-05-2009, 06:33 PM #4
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
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11-05-2009, 06:34 PM #5
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
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11-06-2009, 03:25 AM #6
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
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11-06-2009, 03:43 AM #7
- Join Date
- May 2006
- Location
- london england
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- 177
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 ..
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11-06-2009, 05:17 AM #8
- Join Date
- Jun 2009
- Location
- holland
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- 351
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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11-06-2009, 06:30 AM #9
- Join Date
- Sep 2007
- Location
- Scotland
- Posts
- 81
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
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11-06-2009, 06:36 AM #10
- Join Date
- Jun 2009
- Location
- holland
- Posts
- 351
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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