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Showroom DX - Compact Simulator

Discussion in 'DIY Motion Simulator Projects' started by noorbeast, Sep 29, 2014.

  1. francky foor

    francky foor Member

    Joined:
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    My Motion Simulator:
    2DOF, SCN6
    bravo very good!!!
  2. Atlas974

    Atlas974 old school

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    @noorbeast Impressive thread and your compact simulator looks really good. I wish i had skills like you :!
  3. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Ratings:
    +9,085 / 46 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    Many thanks to all for the kind words and encouragement.

    @Atlas974 I think it is more a case of time and perseverance than actual skill. For many of us a 'build' extends way beyond just getting motion going. It is more an ongoing process of refinement and improvement, or maybe even obsession, in bringing your motion sim 'vision' to life. You learn a lot along the way and there are a number of members here that take that and then start a whole new motion sim project.
    • Agree Agree x 3
  4. Atlas974

    Atlas974 old school

    Joined:
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    Occupation:
    Physics chemestry
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    Ratings:
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    My Motion Simulator:
    2DOF, DC motor, Arduino
    I'll try to learn and make!
    • Like Like x 2
  5. glumph

    glumph New Member

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    My Motion Simulator:
    3DOF, AC motor, Arduino
    GOOD WORK!
  6. clarkii

    clarkii New Member

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    My Motion Simulator:
    3DOF, SCN5
    Awesome work !
    • Like Like x 1
  7. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Ratings:
    +9,085 / 46 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    I had discussions a couple of weeks ago with Motion Dynamics about excessive play in one of the 60:1 gearboxes. They thought the issue was the motor to gearbox coupling, so I ordered 2 more prior to pulling the sim apart.

    It turns out that the issue is keyway play on the shaft side slot of the keyway, with the key looking to be firm in the brass gear. I have advised Motion Dynamics accordingly and they will review this video and query the manufacturer.

    • Informative Informative x 2
    • Useful Useful x 2
  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    My whole sim room is currently in a state of utter chaos during the updates I am doing.

    The 60:1 gearbox with excessive keyway play has been shipped backed to Motion Dynamics today, for them to review.

    I am temporarily refitting the 25:1 gearboxes, as Motion Dynamics is not yet certain on a timeline to review the 60:1. To their credit Shane from Motion Dynamics has said he is willing to pull the shaft out of another box if needs be.

    I have ordered a new JRK to replace the one I damaged, plus a spare, and they should arrive either tomorrow or early next week.

    The computer that runs my sim is also getting some attention. I am adding additional fans to the case and a touchscreen 5 fan controller. The temperature controller will be used to monitor the computer, and the simulator JRKs and Arduino. I am currently mocking up a PC 'dock', the main function of which is to tidy up cable and power management as well as enclose a number of audio amps and powerboards.

    The new seat speaker mount is done other than feeding through the wires and adding the seat harness guides.

    20150603_113540.jpg

    20150604_161901.jpg

    20150604_162100.jpg

    20150604_164001.jpg

    20150604_164147.jpg
    • Like Like x 5
  9. SmartCraft

    SmartCraft Good rides are based on how we improve them.

    Joined:
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    My Motion Simulator:
    2DOF, DC motor, Motion platform
    @noorbeast Keep the pictures coming..... Im still learning to Read :)
    • Agree Agree x 1
  10. bruce stephen

    bruce stephen Hammer doesnt fix it, must be electrical

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform, 6DOF
    very nice rig looks professional
    • Agree Agree x 1
  11. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    A before and after of cable management, with the new digital touchscreen fan controller fitted and additional 120mm programmable fan, with billet cover to match the simulator.

    The computer specs are an i7-4770 Haswell Quad-Core 3.4GHz with 16GB Dual Channel RAM 1600MHz with Heatsink and Fins, overclocked Nvidia GTX970 Graphics Card, 250gb SSD, 2Tb 7500 HDD, Intel Liquid Cooling, 750W PSU, Microsoft Windows 8.1 PRO 64 Bit.

    I will eventually do the outside in carbon fiber wrap, once the custom computer dock for the simulator has been built.

    IMG_20150610_112336.jpg

    IMG_20150611_133252.jpg

    IMG_20150611_133317.jpg

    IMG_20150611_160813.jpg
    • Like Like x 3
  12. SmartCraft

    SmartCraft Good rides are based on how we improve them.

    Joined:
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    Purchasing and Inventory Control Manager
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    My Motion Simulator:
    2DOF, DC motor, Motion platform
    Nice looking Computer.....
    I would like some advice with my system. I will need two computers that will connect through Ethernet I will only use the 4 wires and a common ground. My slip ring only has 8 wires and three have to be used to bring in the power.... for the computer/sound/42" LCD screen.
    My question is how powerful of a computer will be needed inside ride? Because my motion control will be outside with the other computer.
    Maybe not enough details but it would take a detailed spec sheet and I haven't done that yet.
  13. Fredrik J

    Fredrik J Member

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    My Motion Simulator:
    2DOF
    I really love this sim!!!
    They way you have made it compact and still beautiful is the trade of a true craftsman!!!
    It´s all in the details. Just one question about the rigidity, how firm is it.
    As you know im going for the tube chassie, but im not sure if the weight would be to much for the motors.
    And i havent solved how to do the traction if i go that way :). Mabey 5 motors 4 in each corner and 1 for traction but then im overbudget ;).

    Freddie
  14. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Thanks for he kind words @Fredrik J.

    The sim is very rigid, despite being very light, with the suspended aluminum base plate, center support subwoofer post and cross motor brace greatly adding to the structural integrity of the design. The single tube for wheel and pedals has substantial bracing at the bends and does not flex, even with the Fantec pedals swinging off it. This was the early thrash testing using my father as a ride along 80kg crash test dummy and it does not flex, even though it is rough driving with a keyboard instead of controls: http://www.xsimulator.net/community/threads/dx-racer-compact-simulator.5866/page-8#post-67997

    The seat detaches from the base with 4 post bolts and 2 nuts for the rods, and one person can easily pick up and carry the base. I can actually pick the whole sim up in one piece, but it is too awkward to carry that way.

    With the 25:1 gearboxes my sim could lift its back end off the ground momentarily when it was switched on and the levers snapped from the rest to centered positions, which is one of the reasons I went to the 60:1, as they can hold the sim and a person sitting in it unpowered. It is in fact my office chair when not in use.
    Last edited: Jun 14, 2015
  15. Fredrik J

    Fredrik J Member

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    My Motion Simulator:
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    Oh im glad i ordered the 60:1 ones then.......hmm. Nice to know.
    Mabey a 4 motor in each corner would support the whole upper frame im building then, then 1 motor for the traction loss motion! for the lower frame.
    I really need to take that into my equation now :). Even though it seems to be complicated.
    And i must say your aluminium construction and carbonfiber mix ads to the race feeling :).
  16. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    I have been having discussions with Motion Dynamics of late about the 60:1, as what I thought was movement in the shaft turns out to be compression of the brass gear.

    Now Motion Dynamics and I have a bit of a different take on that. Shane from Motion Dynamic advises that the 60:1 gearbox is limited to 90nm at the shaft. First off that is the first time I have heard of that and I can not find any reference to such a limitation on the Motion Dynamics website.

    While the manufacturer is of the view that the problem is caused by overdriving motors on reversals, I have my doubts. First, because of the JRK settings the motor is not just freewheeling in how it responds and what it can draw, and second because 90nm at the shaft is the equivalent of well over 200kgs. I know I carry extra padding and the Fantec gear is not light but on a balanced rig that seems unlikely. I am yet to do the math to verify but will when I have some free time. Irrespective of the cause the take away message should be to take care to limit fast reversals with these metal gear high torque gearboxes.
  17. BlazinH

    BlazinH Well-Known Member

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    One inherent issue with using worm gears is that as you need increased torque by using larger ratio gearboxes, the size of the teeth on the large gear decreases. Therefore, you are putting higher pressures on a smaller tooth which makes them more susceptible to damage than smaller gear ratios.

    I started out trying to use 1.1hp 90:1 worm gear motors. The large gears on them were brass also. The teeth quickly deformed causing more backlash and eventually a tooth would break off completely. That is the main reason it is of my opinion that worm gears motors should not be used when attempting to implement heave on a full moving platform.

    One good thing though is that if you use less than 180 degrees rotation and a tooth breaks you still have another side of the gearbox that can be used until a tooth breaks off on that side too.
    • Informative Informative x 1
  18. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
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    112,811Coins
    Ratings:
    +9,085 / 46 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    It makes @SeatTime's work with DIY ball screw actuators all the more interesting!
  19. jthiani

    jthiani Member

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    My Motion Simulator:
    DC motor, AC motor, Motion platform, 6DOF
    Nice project .... love the subwoofer idea. thats creative !!!!
  20. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
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    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    112,811Coins
    Ratings:
    +9,085 / 46 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    The issue with the 60:1 gearboxes compressing the brass gears prompted me to implement something I had planned to do someday, but not during this update, and that is to add heave.

    I am using the tilt mechanism from the original DX Racer chair, as it allows me to have an adjustable setting for the user weight and chair. That way it takes very little to move for heave, as the adjustable sprung loaded pivot is taking the user and seat weight. And yes I have recycled the original Warthog base plate for the mount. The third engine is now mounted using 6mm aluminum angle, carefully slotted over the existing frame and locked down with the existing mount bolts that are also used to suspend the component tray.

    Hopefully I will get some time tomorrow to make the universal joint adapter mount and finish the heave base clamp plates. I will then add another PSU and JRK and rewire the whole sim. A new 92mm fan will mount to the heave base plate with the JRKs moving under it.

    IMG_20150622_152336.jpg IMG_20150622_152553.jpg IMG_20150622_152645.jpg IMG_20150622_153802.jpg

    The computer dock is slowly coming together. It will house the mini amps for the sound and haptic systems, along with powerboards and all wiring.

    IMG_20150615_121954.jpg IMG_20150618_101241.jpg IMG_20150618_143753.jpg IMG_20150621_153819.jpg
    • Like Like x 6
    • Creative Creative x 1
    Last edited: Jun 22, 2015