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Dream comes true- 2DOF + Traction loss -RIP

Discussion in 'DIY Motion Simulator Projects' started by Michail, Jan 5, 2022.

  1. Michail

    Michail Member Gold Contributor

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    Hello guys,

    I would like to ask you to help me to find the right way for making my motion Sim.

    I want a 3 DOF (pitch, roll and heave) + surge and Traction loss.

    Here are two Pictures of my current simrig build from 2010.

    PXL_20220105_123808816.jpg
    compact base 80cm

    PXL_20220105_123835673.jpg
    exdented base 120cm

    First of all, I would like to know how I can calculate how powerfull the motors have to be: nm, W and what the hell is the difference from a 1:50 to 1:60? At the days of 2010 I have read about truck wiper motors. Know I am read ing about motors with 400W plus each.

    Iwould like a compact base like noorbeast`s https://www.xsimulator.net/community/threads/dx-compact-simulator.5866/ and with 32:9 screen like Cameron Olsen´s rig and lovely traction loss. https://www.xsimulator.net/community/threads/my-3dof-motion-simulator.15994/

    Is it posible to configured the sim, that if the car is accelearating the surge effect have to go to the front and pich to back and if the car is breaking the surge to back and pitch to front.

    The base of the sim have to be max 100cm length and 60cm with.

    I am not sure how to realise the surge and the traction loss. At the moment I think the easist solution for the traction loss i another motor like Cameron Olsen have done. But for the surge I am not sure, I suggest me to use drawer rails with 2 or more 60kg servos.

    So far I know, that I can use up to 5 Motor with one Audrino Uno and 2 for each Sabertooh. Than i need to fix the poti for the hall, have to power supply and need basic electric skills. Luckly I am work for commissioning from plants with big 400V motors and inverters plus programming of PLC. So I think I will be know ready to realise my dream after 12 years...

    I would like to ask to, if the PS4&5/Xbox Series X transfer the telemtry data in the network the simtools will work too?

    I would like to ask if the codemasters F1 2021 (PC) is compatible with the simtools, because I can not find in the list.

    And I would like to ask you how to start. Sorry for my englisch, if somebody is from Germany can help me over PM.

    Otherwise I am thrilled to read your suggestions and answers.

    Thanks

    Mike
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    You can use SimCalc and/or Motion Visualizer to get your head around the trade offs in Design Vs physics:

    https://www.xsimulator.net/communit...e-linear-speed-and-forces-of-your-design.270/

    https://www.xsimulator.net/community/faq/motion-visualizer.389/

    A compact design requires lots of torque and the minimum mass you can get away with. Personally if I did a similar design now I would likely go with servo motors.

    Traction loss needs a pivot near the feet, so a base frame is required and given that there is the possibility to consider other design options, like foot mount motors, which provide more inherent design leverage.

    See the Console section of the FAQs for an overview: https://www.xsimulator.net/community/faq/consoles.27/category

    F1 2021 plugin: https://www.xsimulator.net/community/marketplace/f1-2021.254/
  3. Michail

    Michail Member Gold Contributor

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    Hello and thanks for the quick reply.

    I just have downloaded both apps but they are quite to complicated at the moment. Cause I don’t have the basic understanding.

    As I know an electric motor have 3000, 1500 or 1000 rpm and torque < 1 Nm. And here in the building treads there are talks about 60 to 100 rpm and torque over 20 Nm. As I have understand are lower rpm and higher torque from the wormiest right? So can someone give me tips why for example you chose 1:20, 1:50 or 1:60 ratio? What is the goal for what do you choose, rpm, torque. Than I found out in all the other great building threads, that for example the surge speed is good between 150 to 700mm /s. How you calculated these things?

    sorry for my noobness and thank you for your understanding.

    Mike.
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    The apps help work out what motor is required to move a given mass, for a given design, at a desired level of performance. So it is a good idea to play with them to understand the basic trade offs in design Vs physics. Spending some time in the Design section of the FAQs will likely help: https://www.xsimulator.net/community/faq/design-considerations-resources.24/category

    That said, for a shoulder mount seat shaker, which has low load and large inherent design leverage you will find something like these 200w 25:1 motors work well: https://www.motiondynamics.com.au/worm-drive-motor-12v-24v-200w-180-rpm-20nm-torque.html

    For a compact rig with limited inherent design leverage the same motors with 60:1 would work well.
    Last edited: Jan 7, 2022
  5. Michail

    Michail Member Gold Contributor

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    OK, for the moment I am pretty sure how I will reaise the surge axis.

    I am thinking, to buy something like this rails https://www.ebay.de/itm/25346087313...&brand=Unbranded&_trksid=p2047675.c101224.m-1

    or like this:
    https://www.ebay.de/itm/23429118311...yhTWPVr9MR7SpA%3D%3D|ampid:PL_CLK|clp:2047675

    But i am not sure how powerfull the Motor have be.

    On top I would install the 3 Motors for heave, pitch and roll. Here I have a qustion, do it have symatrical triangle or can I install in a higher triangle? I would like to have "real" traction loss with pivot at the front so thi is the reason that I will not use the idea of WBD for two motors for the center back and in the front left and right one.

    Than what ist the advantage to have to Motors at the back and 1 at front, or the oposite?

    I am thinking, that Surge and traction loss is the most dificult to realise, becuase it have to be at the ground with minimal space. I am not sure how to begin. Unfortunelly the motors from simukit are not available. So I have to find other.

    Can somebody tell me about the rails if the Idea is good? I would like to make all three bases from alu profile. But for the first it can be build with wood.
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Rails can work, personally I have used Linear Rails Shaft Rods, but don't accidental let the block past the end of the rails or else you end up with ball bearings everywhere.

    But before you commit do consider other compact possibilities to generate surge cues, such as motion driven harness: https://www.xsimulator.net/community/faq/harness-tensioner-simulation.361/

    Or perhaps moving the wheel and pedal portion of the rig relative to the seat, rather than the whole rig.

    Keep in mind any surge axis has a limited travel range and can't generate sustained surge cues.
  7. Michail

    Michail Member Gold Contributor

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    Unfortunately simukit motors be available in June. So can anybody tell me where to find gearworm motors which are similar frome Europe? Or which kind of wiper motor I have to look for in the scrap yard.
  8. Michail

    Michail Member Gold Contributor

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    Hello again,

    first of all I would like to inform you that I found the motors that I want to use and they will arrive today :)
    I would like to build a motion rig with most parts of SCK Gaming aka scruck tutorial and add traction loss system. But I want to build a full motion instead of a seat mover.

    I Also be highly inspired from Tino's Hypersimulator, that I would like to be my rig adjustable too. So I ordered last week a power seat base from an old VW Passat B6 from the junkyard.

    WhatsApp Image 2022-01-18 at 08.41.18.jpeg

    As I decide to play only VR racing games, I would like to ask you if the steam versions of Automobilista 2 and Assetto Corsa are patchable and usable with simtools. The Bass shaker telemetry is working fine from simhub.

    My major questions are:

    1. how to know how the height of the universal joint has be.
    2. how all of you guys decide to put he motors behind or in front of the joint.
    3. how long have to be the rods?
    4. what is the difference of the DIY licence?

    Thank you for your support.
  9. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    What are the specs of the seat motors you ordered, are you sure they are it for purpose spec wise?

    Most plugins are developed for Steam versions, including Automobilista 2 and Assetto Corsa.

    1. That depends a lot on the actual rig design and if it is a seat shaker (needs less clearance so shorter Ujoint) or full frame (needs more clearance so longer Ujoint).
    2. That is a design decision, sometimes made for aesthetic reason but probably more so around space constraints
    3. Depends on your rig design.
    4. SimTools has its own team and website, see here for license/functionality differences: https://simtools.us/licenses/

    There is a Design section in the FAQs, which is a stepping off point: https://www.xsimulator.net/community/faq/design-considerations-resources.24/category

    In particular have a play with SimCalc and/or MotionVisualizer to get your head around the tradeoffs in design Vs physics, including how that links to a desired performance and the motors needed to likely drive it.
    • Like Like x 1
  10. Michail

    Michail Member Gold Contributor

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    The specs are:
    Wheelchair
    24V DC
    13.4A
    75 RPM
    250 W

    Do you think, that 3 motors can go with 3 DOF without universal Joint?

    Yesterday I was trying the the calc in metric unit m but the calc prompt the error, that I have wrong values. Probably because the xyz position of the rod and motor was below 1. But there is m and this is for me unit meter instead in setting metric of in fir inch in imperial setting.

    I think I will go to try and error.

    I would like to add in front 2 motors on the wheel profile and in the back the the other in 3dof, or for traction loss..

    Thank you for your Support
  11. Michail

    Michail Member Gold Contributor

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    The specs are:
    Wheelchair
    24V DC
    13.4A
    75 RPM
    250 W

    Do you think, that 3 motors can go with 3 DOF without universal Joint?

    Yesterday I was trying the the calc in metric unit m but the calc prompt the error, that I have wrong values. Probably because the xyz position of the rod and motor was below 1. But there is m and this is for me unit meter instead in setting metric of in fir inch in imperial setting.

    I think I will go to try and error.

    I would like to add in front 2 motors on the wheel profile and in the back the the other in 3dof, or for traction loss..
  12. Michail

    Michail Member Gold Contributor

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    Let's start the journey...
    PXL_20220203_181729435.jpg
    Still not sure if 3 motors can handle 3dof (pitch,roll and heave)
    PXL_20220203_182343876.jpg

    Please advice and help.
  13. Michail

    Michail Member Gold Contributor

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    First test:


    Please apologize this is my first video after many years. I don't know how to choose quality on the app.
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  14. Michail

    Michail Member Gold Contributor

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    As the motor is working on the SMC3 which you can see in the video above. I would like to ask you all, how to calibrate the hall sensor? Or where can I see the position Feedback in smc3?

    I think the lever have to be in lane with the horizon. How can I calibrate the 360 hall sensor?

    further I would like to ask if the 250W motors Are able to handle 3dof. The ctc lever have a length from motor shaft to rod 37.4mm or 67.4mm. I would like to have pitch, roll and heave if it possible.

    aswell I would like to ask if simtools offer a free demo, which works with life for spped. And how I can download. And if I be qualified to get a DIY license.

    Before I assemble the rig hopefully in the next weekend I would like to calibrate and test in simtools.

    thank you
    Last edited: Feb 5, 2022
  15. Michail

    Michail Member Gold Contributor

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    Hello again,

    I would like to apologize that I am asking noob questions. And I am thinking, that is the reason that no more answers are posted here.

    So I read many threads and try to find the solutions there.

    So I have downloaded the simtools demo and setup the interface and 3 axis for all my three motors.

    PXL_20220206_002208421.jpg

    So I patch the game LFS and and try the driving school. It's working I am so happy



    I struggle to calculate if the motors are capable to handle 3dof. The simcalc can only calculate 2dof.

    I know that the rest position have to be lever to rod 90 degree.

    Have anybody if someone here is reading the thread a suggestion what kind of spring or damper I can install if the motors not powerfull enough are.

    Now I have to make decision what kind of design I have to choose. Because I only wait for the CTC lever, which is coming next week.

    Thank you
    Last edited: Feb 6, 2022
  16. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
  17. Michail

    Michail Member Gold Contributor

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    So I need your help guys..

    I want to make the seat electric adjustable.
    The issue with I have is the design for heave the back of the seat I I want to play Eurotruck or GT instead of open wheeler.

    But I am struggle to make a simple design of it. Unfortunately the base which I have brought does not have the system vor heave.

    So I try this, to install the both rods in the back of the seat. I just want to try if the design works withput load. but don't work:
    16444412068699024742397858477343.jpg

    16444414515626830054882388426445.jpg
  18. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Does the upper point freely rotate?

    Is the lower point fixed on the frame so it can't slide?

    Rig.jpg
  19. Michail

    Michail Member Gold Contributor

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    I can heave manual by hand. But it is not completely freely.
    And yes they are fixed in the back and can’t slide.
    I think I have to shrink the rod to be more effective. But general is this the right way? I can’t find information through google or YouTube. And the search here in this forum with keywords “powerseat” “adjustable seat” does not have any results.
    How I say before, I am inspired by Tinos hyper sim.
  20. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    I would have thought the simplest way would be a central perpendicular actuator with roller guides either end, or better yet a perpendicular actuator either end.