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Showroom Full frame 2DOF G-Seat with Wind & Vibe

Discussion in 'DIY Motion Simulator Projects' started by MarkusB, Jul 12, 2018 at 23:05.

  1. MarkusB

    MarkusB Active Member Gold Contributor

    Joined:
    Jun 30, 2015
    Messages:
    270
    Location:
    Bremen, Germany
    Balance:
    1,830Coins
    Ratings:
    +223 / 1 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK, Motion platform
    Hi folks,

    after finishing my first rig (see my first build thread), I took it apart again and started from scratch. Too many things had to change, so that it was not possible to go on with what I had.

    My second build is again a 2DOF full frame simulator with integrated G-Seat, but with quite some improvements compared to the first one. The most important aspect is that the 2DOF and the G-Seat motors are much stronger than before.

    This was my old rig:
    MyOldRig.jpg

    And that’s the new one:
    NewRig_small.jpg NewRig_small2.jpg

    Only the seat is still the same as on my first rig. Well, at least its steel frame, because I ripped off all the fabric.

    You see two kind of boxes, one on the left and one on the right side of the rig.
    The right box contains all the power supplies, which can be separately switched on and off:
    05 TrafoBox mounted_s.jpg 01 TrafoBox_s.jpg
    • 24 V: needed for the wheel chair motors and the Super500 servos
    • 19 V: needed for the force feedback wheel
    • 12 V: needed for the Seaflo blowers, the cooling fans, and the bowden cable motor
    • 9 V: needed for the Arduinos
    • 6 V: needed for the 33kgcm servos
    • 5 V: needed for the signal lines of the Super500 servos

    And the left box contains the main parts of the electonics: The sabertooth 2x32 for the wheel chair motors, a JRK12v12 (had this one from my first rig) for the bowden cable motor, 2 Arduinos, and a 10 port USB3 hub:
    ElectronicsBoxMounted_s.jpg ElectronicsBox_Front_s.jpg ElectronicsBox_withFans_s.jpg ElectronicsBox_Back_s.jpg

    Here are the 2DOF motors. I am using second hand wheel chair motors, which really have plenty of power.
    They are controlled via an Arduino and a Sabertooth 2x32.
    2DOF Motors.JPG


    This is my G-Seat.
    09 G-Seat_s.jpg

    Each surge flap is powered by three 33kgcm servos, ...
    06 Lift mechanism 02_s.jpg

    ... and each heave flap has one Super500 servo connected:
    08 Heave Flaps 02_s.jpg

    One special thing about my G-Seat is that the backrest including the surge servos moves up and down. This shall increase the impression that you are pressed into the seat (when the backrest moves up) or lifted out of the seat (when the backrest moves down). I got this idea during a real flight, when I observed in which way I sensed the different forces. Here are some pictores of the lift mechanism, which is powered by two Super500 servos.
    05 Lift mechanism 01_s.jpg 06 Lift mechanism 02_s.jpg

    All 10 servos are controlled by a single Arduino board:
    10 Electronics 01_s.jpg 11 Electronics 02_s.jpg
    The Super500 servos need 24 V for the motor and 5 V for the signal, the 33kgcm servos run with 6 V, and the Arduino gets 9 V. So this circuit board is connected to 4 different power sources.
    By the way: The software I use is based on the one from @Spit40. The backrest flaps only move on positive surge and sway values, while the heave motors run in both directions.

    Oh, and then - inspired by @SeatTime - I added a bowden cable for simulating negative surge forces (i. e. braking). For this purpose, I re-used one worm gear motor from my first rig, added a wheel, and connected a bowden cable that goes to the front of the rig.
    BowdenCableMotor_1s.jpg BowdenCableMotor_2s.jpg BowdenCableOutput_1s.jpg BowdenCableOutput_2s.jpg

    My current problem with this component is that I don't have a suitable harness. I tested a shoulder belt that is meant for carrying a saxophone, but this did not work. I feel the belt tighten around my shoulders instead of my body being pulled forward.
    If I don't find something suitable, I will use the bowden cable for a usual seat belt tensioner. For this purpose, I just need to lead it to the top of the backrest instead of to the front of the rig and connect it to my seat belt. (So luckily I am not finished yet. :))

    With my previous rig I used rumble motors for simulating engine vibrations. Now that @yobuddy has relased the ingenious Game Vibe software, I changed to this one. For now I just have a very basic setup with one amplifyer and two bass shakers that are mounted to the backrest:
    01 Amplifier_s.jpg 02 Shaker_s.jpg 03 Shaker_s.jpg

    And finally, I added two Seaflo blowers for getting an airstream, based on @SilentChill's phantastic thread:
    Seaflo_s.jpg

    Last but not least: Here's the probably most important feature, which is meant to increase the WAF (Woman Acceptance Factor): The dimensions of the rig make it fit exactly into a corner of the room, so that it becomes nearly invisible.
    WAF_s.jpg

    And finally, here you see the new rig in motion.

    The first video shows how the single axis move. For making the bowden cable movements visible, I have connected it to the backrest with a rubber band. You will see that the Super500 servos are rather slow, but since I am focusing on flight simulations, this is ok for me.


    The second video shows a rollercoaster ride. For making the wind visible, I have mounted some tissue paper to the blowers.

    Attached Files:

    • Like Like x 6
    Last edited: Jul 13, 2018 at 08:28
  2. Spit40

    Spit40 VR Rift Flyer

    Joined:
    Nov 3, 2016
    Messages:
    215
    Location:
    United Kingdom
    Balance:
    1,747Coins
    Ratings:
    +121 / 1 / -0
    My Motion Simulator:
    3DOF
    Wow, that is some piece of kit. 'Nearly invisible' did you say !!
  3. MarkusB

    MarkusB Active Member Gold Contributor

    Joined:
    Jun 30, 2015
    Messages:
    270
    Location:
    Bremen, Germany
    Balance:
    1,830Coins
    Ratings:
    +223 / 1 / -0
    My Motion Simulator:
    2DOF, DC motor, JRK, Motion platform
    Only if it hides in the corner. Otherwise it is far from being a secret 007 simulator. Guess it‘s more the Rambo style.
    • Like Like x 1
    Last edited: Jul 14, 2018 at 12:16