1. For downloading SimTools plugins you need a Download Package. Get it with virtual coins that you receive for forum activity or Buy Download Package - We have a zero Spam tolerance so read our forum rules first.

    Buy Now a Download Plan!
  2. Do not try to cheat our system and do not post an unnecessary amount of useless posts only to earn credits here. We have a zero spam tolerance policy and this will cause a ban of your user account. Otherwise we wish you a pleasant stay here! Read the forum rules
  3. We have a few rules which you need to read and accept before posting anything here! Following these rules will keep the forum clean and your stay pleasant. Do not follow these rules can lead to permanent exclusion from this website: Read the forum rules.
    Are you a company? Read our company rules

6DOF with wheelchair motors?

Discussion in 'Commercial Simulators and Peripherie' started by egoexpress, Sep 16, 2008.

  1. egoexpress

    egoexpress Active Member

    Joined:
    Dec 13, 2006
    Messages:
    3,842
    Location:
    Germany - Frankfurt/M
    Balance:
    374Coins
    Ratings:
    +7 / 1 / -0


    And an addtional vid of the motor



    Would like to know how much payload...
  2. Ads Master

    Ads Master

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
  3. tronicgr

    tronicgr

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
    :D

    Here is a small tip: He cooperates with John (planmix) for the development of the matlab washout module... but he uses his own software and hardware interface!
  4. RaceRay

    RaceRay Administrator Staff Member SimAxe Beta Tester

    Joined:
    Nov 8, 2006
    Messages:
    4,653
    Occupation:
    Self-employed | Web and application development
    Location:
    Hamburg, Germany
    Balance:
    25,010Coins
    Ratings:
    +1,659 / 10 / -0
    My Motion Simulator:
    2DOF, DC motor, SimAxe, SimforceGT
    Oh man,

    i just wanted to publish the same video, but chris, you were faster, again. Even youtube notified me just a few minutes ago about my new subscription videos. :?

    Any way, would like to know the sheet and price of the massive looking motor.

    Thanos, what about your 6DOF project status, are there any proceedings about implementing the washout algorithms?

    Kindest regards, René
  5. tronicgr

    tronicgr

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
  6. RaceRay

    RaceRay Administrator Staff Member SimAxe Beta Tester

    Joined:
    Nov 8, 2006
    Messages:
    4,653
    Occupation:
    Self-employed | Web and application development
    Location:
    Hamburg, Germany
    Balance:
    25,010Coins
    Ratings:
    +1,659 / 10 / -0
    My Motion Simulator:
    2DOF, DC motor, SimAxe, SimforceGT
    Hi Thanos,

    thanks for the infos. Very cool new prototype model and complex looking software interface!

    B.T.W i showed my girlfriend your robot eating flower, and she wants that thing for our living room to scary some visitors :D

    regards, René
  7. tronicgr

    tronicgr

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
    I made a enquiry for the motors:


    So, its a bit expensive!!! 282.00 GBP = 356.65 EUR = 512.52 USD !!!!! :(

    Thanos
  8. RaceRay

    RaceRay Administrator Staff Member SimAxe Beta Tester

    Joined:
    Nov 8, 2006
    Messages:
    4,653
    Occupation:
    Self-employed | Web and application development
    Location:
    Hamburg, Germany
    Balance:
    25,010Coins
    Ratings:
    +1,659 / 10 / -0
    My Motion Simulator:
    2DOF, DC motor, SimAxe, SimforceGT
    My fear became true. Everytime the same. The most industrial products are not made for hobiests. That´s sad!
    I estimate, that round about 20% discount is possible, if we tell that the motors are for a non commercial product, or/and when we would buy more pieces of it.

    All told, too much expensive for me :(
  9. Mambo

    Mambo New Member

    Joined:
    Aug 5, 2008
    Messages:
    168
    Location:
    Czech Republic
    Balance:
    250Coins
    Ratings:
    +1 / 0 / -0
  10. RaceRay

    RaceRay Administrator Staff Member SimAxe Beta Tester

    Joined:
    Nov 8, 2006
    Messages:
    4,653
    Occupation:
    Self-employed | Web and application development
    Location:
    Hamburg, Germany
    Balance:
    25,010Coins
    Ratings:
    +1,659 / 10 / -0
    My Motion Simulator:
    2DOF, DC motor, SimAxe, SimforceGT
    Supporting the motors with damped springs is a nice idea. Imagine, the whipper motors can theoretical lift a mass of 15Kg. Let´s add a damper with 15kg force to support it. Both multiplied with six for a steward platform and that thing should lift max. 180kg excl. the weight of the nacked platform.

    A problem for the motors could be any dynamic change of the loads. For example, due to the missing counterforce, you need for testing purposes without loads softer damper or no damper at all . Otherwise the motors must work with nearly the load capacity of 15Kg per motor when the platform should sink. Nearly because the platform´s basic weight is not included in the calculation. Maybe it would move, but only very slow to the ground direction, and fast to the top.

    But i think that could be worth a try for building a very cheap hexapod platform.

    Kind regards
    René
  11. Planmix

    Planmix New Member

    Joined:
    Jun 25, 2008
    Messages:
    22
    Occupation:
    Home Automation - Satellites - Sequirity Systems
    Location:
    Athens - Greece
    Balance:
    339Coins
    Ratings:
    +0 / 0 / -0
    Nikola, (the guy who built this platform), is the best! He is far front in maths and programming.
    He was very helpful at me, especially with the Matlab communication, and I want to say a big thank you to him for all his support.
    Maybe the next time I'll be in Holland I'll meet him :)
  12. JRL

    JRL New Member

    Joined:
    Nov 27, 2008
    Messages:
    13
    Balance:
    5Coins
    Ratings:
    +0 / 0 / -0
    Is my mind not working or could you hang the entire platform and use wiper type motors to control the pitch attitudes? The only weight problem would be heave or the vertical axis.
  13. Planmix

    Planmix New Member

    Joined:
    Jun 25, 2008
    Messages:
    22
    Occupation:
    Home Automation - Satellites - Sequirity Systems
    Location:
    Athens - Greece
    Balance:
    339Coins
    Ratings:
    +0 / 0 / -0
    You need powerful and fast motors. If, for example, your weight of the platform with the pilot is 240Kgr, each actuator has to lift 40Kgr, and you need speed 60-100cm/sec so to feel the lack of gravity. If you calculate the accellerations then you have to triple this.
    I designed a low cost actuator that I'll use to my platform, with drive distance 100cm, 70cm/sec speed and load 100Kgr. The cost of this will be about 2000-2500 euros each actuator. The drive distance would be expandable till 1.5m.
    I asked info about prices for similar actuators and they told me a cost greater than 6000euros.

    If you hang the platform you will not have correct motion because there will be much swinging.
  14. Planmix

    Planmix New Member

    Joined:
    Jun 25, 2008
    Messages:
    22
    Occupation:
    Home Automation - Satellites - Sequirity Systems
    Location:
    Athens - Greece
    Balance:
    339Coins
    Ratings:
    +0 / 0 / -0
    The Nikola's progress.
  15. just4fun

    just4fun New Member

    Joined:
    Mar 3, 2009
    Messages:
    1
    Balance:
    0Coins
    Ratings:
    +0 / 0 / -0
    Would it be possible to post some parameters of your 6 dof motion base? Such as, the overall base size,the upper platform size, the length of the motor arms, the lenght of the rods, the spacing of the motors,rods on the base and upper platform.As near as I can tell from your posted video, my estimation of the lenght of the motor arms is approximately 155mm, +/- 5mm.
    I am looking into building a similar base, any help would be greatly appreciated.
    What a fantastic job you have done on your base, its awesome.

    Thanks
    Just4fun
  16. nightrider

    nightrider New Member

    Joined:
    Oct 27, 2010
    Messages:
    1
    Balance:
    0Coins
    Ratings:
    +0 / 0 / -0
    There is already a great improvement of Nikola.