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

Frex SimWheel

Discussion in 'Off Topic - All other stuff here' started by matt_tighe, Aug 9, 2008.

  1. tronicgr

    tronicgr

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
    I found what is the part with the orange gear ring, that is connected right after the motor shaft...

    http://www.nbk1560.com/couplicon/produc ... ex_en.html

    Its a Zero Backlash, Soft Flexible Coupling !!!!!! :lol:

    The question that remains is how it connects to the main screw...

    Thanos
  2. matt_tighe

    matt_tighe New Member

    Joined:
    Jan 2, 2008
    Messages:
    21
    Balance:
    1Coins
    Ratings:
    +0 / 0 / -0
    Great find Tronic! How did you work that one out.

    So the reduction in backlash is just caused by having a flexible coupling?

    We can't see where it's transmitting the drive to yet until someone gives a clearer pic.
  3. egoexpress

    egoexpress Active Member

    Joined:
    Dec 13, 2006
    Messages:
    3,842
    Location:
    Germany - Frankfurt/M
    Balance:
    374Coins
    Ratings:
    +7 / 1 / -0
    I think I've figured it out.

    The tiny motor on the back is imho just for cooling purposes! :D

    They seem to use a linear motor system like those from SEW Eurodrives! These are motors with massive torque, are fast as hell, are silent and have no rotational parts (they call it motor, but it is more a magnetic rail, than a conventional motor).
    Such motors are used for example in the carmikaze simulator!

    playtime 2:48

    http://www.youtube.com/watch?v=r97E_QvCoQs

    It's likely that such a linear motor powers the slide on the rail, I think.
    Otherwise I couldnt explain how they could be able to achieve that much torque.

    Regards
    Christian

    http://en.wikipedia.org/wiki/Linear_motor
  4. tronicgr

    tronicgr

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
    It could be a linear motor system on the bottom, but it would have to be very compact and its another thing... I don't see any cables coming out of the bottom, where it should be this motor!

    Frex_SimWheel_006_edit.jpg

    (another enhanced photo of the motor...)


    Thanos
  5. egoexpress

    egoexpress Active Member

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

    Regards
    Christian
  6. adgun

    adgun Active Member

    Joined:
    Jan 28, 2008
    Messages:
    437
    Occupation:
    mechanic
    Location:
    Netherlands
    Balance:
    5,167Coins
    Ratings:
    +103 / 3 / -0
    Hi
    they are not the only one.

    Attached Files:

  7. Mambo

    Mambo New Member

    Joined:
    Aug 5, 2008
    Messages:
    168
    Location:
    Czech Republic
    Balance:
    250Coins
    Ratings:
    +1 / 0 / -0
    If you think about it every thing speaks to my version with two screws :D Soft Flexible Coupling is connect to smaller screw. If you look at picture there is another bearing. Gearing is do by difference in pitches and diameters of screws. We cant just see (i hope)

    EDIT: Linear motor wuld be faar more expensive, better way is BLDC motor.
    EDIT2: I want this baby http://www.mmspektrum.com/multimedia/im ... 25_big.jpg :D that would be FF :DD (most powerful has around 20 000 Nm from 0 rpm )
  8. egoexpress

    egoexpress Active Member

    Joined:
    Dec 13, 2006
    Messages:
    3,842
    Location:
    Germany - Frankfurt/M
    Balance:
    374Coins
    Ratings:
    +7 / 1 / -0
    That system is, from what I see, more a rumbling system, than Force Feedback device.
    Do you have a link to the manufacturer?
  9. adgun

    adgun Active Member

    Joined:
    Jan 28, 2008
    Messages:
    437
    Occupation:
    mechanic
    Location:
    Netherlands
    Balance:
    5,167Coins
    Ratings:
    +103 / 3 / -0
    • Funny Funny x 1
  10. egoexpress

    egoexpress Active Member

    Joined:
    Dec 13, 2006
    Messages:
    3,842
    Location:
    Germany - Frankfurt/M
    Balance:
    374Coins
    Ratings:
    +7 / 1 / -0
    Well, cyberspace, the company who invented/sold the RnR promoted it as Force-Feedback device as well, though it was joystick controlled in the end.

    But the wheel you linked has Force-Feedback obviously. It can be seen in this video.

    Regards
    Christian
  11. adgun

    adgun Active Member

    Joined:
    Jan 28, 2008
    Messages:
    437
    Occupation:
    mechanic
    Location:
    Netherlands
    Balance:
    5,167Coins
    Ratings:
    +103 / 3 / -0
    Hy.
    Ye you are a head of me with the video.
    They made it far more easy than Frex.
    Regards Ad
  12. egoexpress

    egoexpress Active Member

    Joined:
    Dec 13, 2006
    Messages:
    3,842
    Location:
    Germany - Frankfurt/M
    Balance:
    374Coins
    Ratings:
    +7 / 1 / -0
    But their system does not support more than ~280° whell rotation, while the Frex one is multiturn.
    Not really comparable.
    But for those who are satisfied with restricted wheel rotation, like for F1 or Dragsters, it will do the job.
  13. adgun

    adgun Active Member

    Joined:
    Jan 28, 2008
    Messages:
    437
    Occupation:
    mechanic
    Location:
    Netherlands
    Balance:
    5,167Coins
    Ratings:
    +103 / 3 / -0
    Hi Ego
    It isn,t difficult to give it adjustable steer clearence.
    one little gearwheel on the steershaft with 10 tooth for example and a 32 tooth for the end locks
    when the big wheel have allso 32 holes you can put two pins in it for the lock
    and it,s easy to adjust the clearence by putting the pins in different holes.
    regards Ad
  14. tronicgr

    tronicgr

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
    Why don't we concentrate on what ShigeT told, when started designing it:

    (Edited a little the sentence in red to make it more meaningful)


    Then, what way is left yet? And small enough to be able to hide from the photos taken from clarkii2??


    Thanos
  15. egoexpress

    egoexpress Active Member

    Joined:
    Dec 13, 2006
    Messages:
    3,842
    Location:
    Germany - Frankfurt/M
    Balance:
    374Coins
    Ratings:
    +7 / 1 / -0
    In case it isnt a linear motor, then it is made like Mambo suggested.
    A second spindle that drives the slide, which is connected to the coupling.

    Regards
    Christian
  16. adgun

    adgun Active Member

    Joined:
    Jan 28, 2008
    Messages:
    437
    Occupation:
    mechanic
    Location:
    Netherlands
    Balance:
    5,167Coins
    Ratings:
    +103 / 3 / -0
    Hi
    When i look at the picters i still don,t get it ,with the second shaft
    I see a coupler and bearing, but a smaller shaft is useless ore it must be for avoiding tilting the slider.
    But the roller shaft is so big the zero backlash nut will avoid that
    I see no function for a second shaft and makes it complecated for nothing.
    regards Ad
    • Friendly Friendly x 1
  17. Mambo

    Mambo New Member

    Joined:
    Aug 5, 2008
    Messages:
    168
    Location:
    Czech Republic
    Balance:
    250Coins
    Ratings:
    +1 / 0 / -0
    Small shaft dont avoid slider, in slider there is another nut witch is connect to big nut when motor spin, small nut slide (for example) right and big nut also move right. Movment of big nut makes big screw rotates. Bigscrew has high pitch (a gess about 80 mm per one rotation -it looks like multi screw-thread ) so thats mean if you turn whelle one turn nut make 80 mm travel and smaller screw must rotate more (if it has pitch 5 mm then must rotate 16x more) thats make the transmission.
  18. adgun

    adgun Active Member

    Joined:
    Jan 28, 2008
    Messages:
    437
    Occupation:
    mechanic
    Location:
    Netherlands
    Balance:
    5,167Coins
    Ratings:
    +103 / 3 / -0
    Hi Mambo.
    I know what you mean, but you can do this all without the second shaft ,only with the big shaft.
    why put a second shaft in it.
    regards Ad
  19. tronicgr

    tronicgr

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
    Just to mention that if second shaft/screw is used, it has to have the same pitch, otherwise one nut (high pitch) will try to move faster than the other nut (small pitch)!!!!

    It must be another way of coupling the motor to the big screw!

    Thanos

    Btw, I noticed that while the is a bearing on the left (below the big screw shaft), there in no bearing on the right side end!! This eliminates I suppose the possibility for second small screw shaft!
  20. matt_tighe

    matt_tighe New Member

    Joined:
    Jan 2, 2008
    Messages:
    21
    Balance:
    1Coins
    Ratings:
    +0 / 0 / -0
    the idea of a second shaft is cool but.

    There's no space for it in the pictures, it would have to be inside the shuttle at the bottom which it isn't cox the motor isn't aligned there.

    As tronicgr said you would not be able to turn the wheel as the small screw couldn't be back driven. This would mean you'd need a torque sensor so you could control ALL movement from the motor in response to torque on the wheel.
    (I love that idea but doubt it's being used here?)


    Whatever the answer is, it's only about the size of a large matchbox and is hidden from view due to the angle of those pictures... Connected to the right side of the flexi coupling and going into some sort of bearing in the ali block.

    Shige you evil genius... What have you done?!?!?