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 Download Package Now!
  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 here. Do not following these rules will lead to permanent exclusion from this website: Read the forum rules.

Seattime's Sims

Discussion in 'DIY Motion Simulator Projects' started by SeatTime, Mar 8, 2018.

  1. BlazinH

    BlazinH Well-Known Member

    Joined:
    Oct 19, 2013
    Messages:
    2,041
    Location:
    Oklahoma City, USA
    Balance:
    14,882Coins
    Ratings:
    +1,706 / 30 / -1
    I have a similar experience with my G-seat and 2 dof. But for me it doesn't replace what you feel from displacement when the rear kicks out too. But my seat back doesn't move horizontally like yours does either so I can't know how that feels. I beg to differ somewhat though that constant pressure should be applied during traction loss. When the rear kicks out I believe the g force is diminished as some of it is transferred into displacement as your body moves sideways with the vehicle.
  2. SeatTime

    SeatTime Well-Known Member

    Joined:
    Dec 27, 2013
    Messages:
    2,285
    Location:
    Newcastle Australia
    Balance:
    26,778Coins
    Ratings:
    +2,580 / 29 / -0
    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    It begins ... :). New Rigs Equipment Enclosure/Plinth frame built. Plenty of room for my computer, DD wheel equipment, motor drivers and G seat 'Actuators'. When finished it will be covered in painted plywood with fans at each end for airflow - All very neat and will take up a fraction of the space of the old rig, the Wife will be happy ;).

    New Rig Equipment box_plinth.jpg
    • Like Like x 3
  3. wannabeaflyer2

    wannabeaflyer2 Well-Known Member

    Joined:
    Jun 12, 2015
    Messages:
    606
    Location:
    london uk
    Balance:
    7,105Coins
    Ratings:
    +793 / 4 / -0
    My Motion Simulator:
    2DOF, Arduino, Motion platform, 6DOF
    hi @SeatTime its the nature of the Beast that is called DIY lol, Were always on the look out for the next update ... Microsoft has lot to answer for :) (that would be my take on an analogy said with a smile)

    Nice work and knowing the creator , then there's greater things to come :) still waiting for slow boat from china with parts for my latest attempt , but i too hope to be back making contributions here ...
  4. SeatTime

    SeatTime Well-Known Member

    Joined:
    Dec 27, 2013
    Messages:
    2,285
    Location:
    Newcastle Australia
    Balance:
    26,778Coins
    Ratings:
    +2,580 / 29 / -0
    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Added all the top covers. The raised portion seen in the photo is were the rig is supported with steel cross braces and then 15mm of medium density rubber sheet underneath. A rubber lined cradle will then be mounted to this support to hold the rig. All this work is to minimize any possible noise transfer and maximize the effect of the transducers.

    New Rig 2.jpg
    • Like Like x 1
  5. BlazinH

    BlazinH Well-Known Member

    Joined:
    Oct 19, 2013
    Messages:
    2,041
    Location:
    Oklahoma City, USA
    Balance:
    14,882Coins
    Ratings:
    +1,706 / 30 / -1
    is_it_dry.jpg

    :D
    • Funny Funny x 1
  6. SeatTime

    SeatTime Well-Known Member

    Joined:
    Dec 27, 2013
    Messages:
    2,285
    Location:
    Newcastle Australia
    Balance:
    26,778Coins
    Ratings:
    +2,580 / 29 / -0
    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    All the old equipment has now been stripped from the old rig and ready to be re-purposed :).

    New G Rig Equipment.jpg

    The Sim capsule with the current G seat and harness system is also waiting for a upgrade and placement onto its new home.

    Old rig ready to move.jpg
    • Like Like x 6
  7. noorbeast

    noorbeast VR - The Next Generation Staff Member Moderator

    Joined:
    Jul 13, 2014
    Messages:
    13,474
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    101,735Coins
    Ratings:
    +8,476 / 41 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    One hell of a hardware collection you now have!

    I am really looking forward to your next evolution, as it is always creative and innovative.
  8. BlazinH

    BlazinH Well-Known Member

    Joined:
    Oct 19, 2013
    Messages:
    2,041
    Location:
    Oklahoma City, USA
    Balance:
    14,882Coins
    Ratings:
    +1,706 / 30 / -1
    You aren't kidding! To a sim addict that's like hardcore porn :). But now I'm going to have to attend another one of those "anonymous" meetings where the first thing you do is say you name and tell everyone you have a problem :(.

    Just joking :p
    • Agree Agree x 1
    Last edited: Oct 28, 2019
  9. SeatTime

    SeatTime Well-Known Member

    Joined:
    Dec 27, 2013
    Messages:
    2,285
    Location:
    Newcastle Australia
    Balance:
    26,778Coins
    Ratings:
    +2,580 / 29 / -0
    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Rig now on its new equipment plinth - much less of a footprint and low to the ground for easy access :D Just need to cut another entry 'hatch' and add a step which is already built. The whole plinth is sitting on rubber sheet and so is the capsule. The basic G seat and Harness should be all back working by tomorrow and then I will start upgrading each part. This Rig will have allot of 'lessons learnt' (for me) designed into it :).

    New Rig on Equipment Plinth.jpg
    • Like Like x 6
  10. SeatTime

    SeatTime Well-Known Member

    Joined:
    Dec 27, 2013
    Messages:
    2,285
    Location:
    Newcastle Australia
    Balance:
    26,778Coins
    Ratings:
    +2,580 / 29 / -0
    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Have now cut out the extra hatch, re-positioned the support plate that holds the Aircraft throttle or Car gear shift. This was required to better fit the greater height of the new seat base and also gain some extra width for larger users. Replace the rubber on all paddles to something a bit denser/thicker to improve comfort/operation. Now installing the new heave system for the seat base. The seat base will also be upgraded so that it also moves in sway as well as surge. Oh also installed a single step, which unfortunately is not easy to see in the photo.

    New Rig 4.jpg

    New Rig5.jpg
    • Like Like x 4
  11. BlazinH

    BlazinH Well-Known Member

    Joined:
    Oct 19, 2013
    Messages:
    2,041
    Location:
    Oklahoma City, USA
    Balance:
    14,882Coins
    Ratings:
    +1,706 / 30 / -1
    Looking good so far ;). As you have said our systems never seem to be done and we are always looking at further innovation.

    On that note since you've already been there and done that I have been thinking about a head system now myself and thought I'd ask if you are able to share your choice of motor(s). Specifically what is their max torque or if you don't know what wattage are they. Obviously you want something that will pull with effective force but that can't smash your cranium into the motor if something go awry :eek:.
  12. SeatTime

    SeatTime Well-Known Member

    Joined:
    Dec 27, 2013
    Messages:
    2,285
    Location:
    Newcastle Australia
    Balance:
    26,778Coins
    Ratings:
    +2,580 / 29 / -0
    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Nothing special about the motors - I use basically the same motors that drive other parts of the sim, you just want to control the torque applied to the head ;). I'm sure you can work it out from there - there are lots of ways it can be done.
  13. SeatTime

    SeatTime Well-Known Member

    Joined:
    Dec 27, 2013
    Messages:
    2,285
    Location:
    Newcastle Australia
    Balance:
    26,778Coins
    Ratings:
    +2,580 / 29 / -0
    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Unlike most, this was more then just further innovation of my current system. Not easy to bite the bullet and totally change tack. I'm really liking it so far, not saying it will be perfect, but allot of the usual issues with standard motion systems have been removed.
    • Agree Agree x 1
  14. BlazinH

    BlazinH Well-Known Member

    Joined:
    Oct 19, 2013
    Messages:
    2,041
    Location:
    Oklahoma City, USA
    Balance:
    14,882Coins
    Ratings:
    +1,706 / 30 / -1
    Well I used very specialized test equipment and found that 5 lbs. of force seems the most needed without getting extreme. I put a 5 lb. weight on the end of a cable then laid on my sofa with my head stuck over the end with the cable and weight hanging off of it :D. Crude but it gives the exact force you would feel. My neck would be tired in no time when racing I think with 5 lbs, at least until I build up my neck muscles :blush.

    But I'm trying to keep things as small and as light as possible so I'm looking for a motor(s) that will provide around 5 - 7 lbs. of force max. It can't be a locking type worm gear or have gearing that makes it hard to be back driven though. It would be fairly easy to just get a big motor with enough torque to drive it without gearing but to keep it light I'm trying to find a smaller motor with gearing that will back drive. But most are low speed with high torque where I need medium speed with medium torque. And I think 24v would be better than 12 since the motor will be mostly in a stalled state when power is applied.

    If you or anyone has a suggestion please let me know .


    * Update: Got it all worked out and waiting for parts to arrive :) *
    Last edited: Nov 2, 2019
  15. cfischer

    cfischer Member Gold Contributor

    Joined:
    Sep 7, 2015
    Messages:
    79
    Location:
    Colorado
    Balance:
    525Coins
    Ratings:
    +30 / 0 / -0
    Didn't your neck muscles feel 8 lbs of head plus 5 lbs of weight?
  16. BlazinH

    BlazinH Well-Known Member

    Joined:
    Oct 19, 2013
    Messages:
    2,041
    Location:
    Oklahoma City, USA
    Balance:
    14,882Coins
    Ratings:
    +1,706 / 30 / -1
    Not initially anyway because you're accustomed to having your head always attached if you're lucky :D. But I spent 5 min. and set up another experiment using a pulley to drop the weight from so I could keep my head vertical. Results were similar except I could hold the 5 lbs. for longer before feeling the same stress. The motor I ordered will produce 8 lbs of force though so I tried the experiment again with 7.5 lbs. and it seems adequate to provide enough "feedback". My view has always been simulators are a feedback device anyway since for the most part they are not capable of being reality recreating devices.

    But if you want a head system that reproduces reality I think you need about 40 lbs. of force to simulate 5g.
    Last edited: Nov 3, 2019
  17. sulfail

    sulfail Member Gold Contributor

    Joined:
    Aug 31, 2018
    Messages:
    60
    Occupation:
    AISLAMIENTOS Y PLADUR.
    Location:
    vigo(pontevedra) SPAIN
    Balance:
    312Coins
    Ratings:
    +22 / 0 / -0
    My Motion Simulator:
    2DOF, Arduino
    Just missing some good fans to simulate wind, I use one and perfect, gives more immersion, I am sincerely impressed with your simulator.:popcorn
  18. SeatTime

    SeatTime Well-Known Member

    Joined:
    Dec 27, 2013
    Messages:
    2,285
    Location:
    Newcastle Australia
    Balance:
    26,778Coins
    Ratings:
    +2,580 / 29 / -0
    My Motion Simulator:
    DC motor, Motion platform, 6DOF
    Re-purposed a old CNC part by swapping out the stepper motor and adding a drive arm. This will be used to drive the bottom seat heave.

    New Rig6.jpg
    • Like Like x 1
  19. Trip Rodriguez

    Trip Rodriguez VR Pilot

    Joined:
    May 8, 2016
    Messages:
    510
    Location:
    Lake Ariel, Pennsylvania
    Balance:
    2,751Coins
    Ratings:
    +213 / 3 / -0
    My Motion Simulator:
    6DOF
    @SeatTime and also @pmvcda Might you share any thoughts you have on Stewart Platform geometry? Specifically the relationship in dimensions of the lower joints to the upper joints?
  20. Trip Rodriguez

    Trip Rodriguez VR Pilot

    Joined:
    May 8, 2016
    Messages:
    510
    Location:
    Lake Ariel, Pennsylvania
    Balance:
    2,751Coins
    Ratings:
    +213 / 3 / -0
    My Motion Simulator:
    6DOF
    I have considered a similar approach and now that you are going that route I'm thinking about it again.

    Really my only big concern about doing this is heave since I'm mostly flying, not driving. For me that feeling of big heave motion is a defining characteristic of flight and puts a grin on my face more than any other effect.

    So I'm wondering just how well I can trick my brain into thinking there is serious heave happening when there isn't actually. I can simulate everything, but I don't think my gut will be convinced!

    Something to consider: Since I'm starting from scratch again anyway (I already bought the 6 servos and the Thanos board but that's all) maybe I'll build the G-systems first and then decide if/what needs to be added. The idea of eliminating the motion compensation problem entirely is awful appealing. If I can build a completely satisfactory sim with this kind of form factor that would solve a whole lot of problems for me.

    I don't imagine I could move the lighthouses even on a heave only platform without them getting upset.... Everything but the heave I'm pretty sure I can satisfactorily do with small travels built into the cockpit as SeatTime has done.

    So now I'm back to possibly needing a 100% on-board tracking solution for the HMD that I can fool with an enclosed cockpit, but I'm not willing to sacrifice the FOV by going back to a Rift.... D=
    • Like Like x 1