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Jump Start 2DOF

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by dieser, Jan 25, 2020.

  1. dieser

    dieser Member

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    Hello dear xsimulator community,

    I am a complete novice in the field, but I am very enthusiastic and motivated to build a simulator ...
    Unfortunately I am without any previous knowledge, but I hope you can give "jump start";)

    I want to build a 2DOF simulator for now.
    Read a lot, a lot of confusion ...

    Can you please tell me if the engine I have googled out is suitable for my project?

    Description: (Unfortunately I cannot add a link, but it is from the large online department store with the a)
    The DC power of the electric motor: 350 W; Voltage: 24 V; Rated current: 18.4 A; Nominal speed: 3000 rpm
    Chain drive: (9 and 13 teeth sprocket) # 410 chain 1/2 inch (12.7 mm) spacing
    This 350W DC motor can be rotated either clockwise or counterclockwise by reversing the motor's power cables
    This DC motor works with Razor Dirt Quad Scooter 24V or other electric scooters, quads or go-karts with a 350W motor

    24v motor with high wattage. Should fit or not ?!

    If the above motor is suitable, which motor driver do I best use?

    I was thinking of two IBT-2s and then connecting to the Arduino One ...


    I would be very grateful for help or advice!

    greets
  2. Ads Master

    Ads Master

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  3. Zed

    Zed VR Simming w/Index Gold Contributor

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    I think the reason you can’t post a link is you’re a new account. That unlocks after a few posts. A link to the motor would be very helpful in people helping you but the parameters you posted will also be helpful.

    The chain drive output probably isn’t important. Few use it for motion sims probably for the slack and hard jerks when that slack gets taken up. It’s probably just a keyed output fitting that can easily be replaced. At 3000 RPM, you will need a gearbox of some kind and the whole system and configuration kind of determines if the motor is suitable. There is a calculator here that you can plug knowns into and it will tell you if certain components are likely to work or not.

    Something that may help is spending a fair amount of time looking at builds similar to what you want to build in the Showcase. You may find one that is a good match for what you want to build in which case you can save time and money by not having to make a lot of the common mistakes. You will find a bunch share a lot of common configurations and even parts. You can build shopping lists from the ones you like.

    I know there is a big impulse to want to dive right in and start ordering stuff, but there are lots of design decisions that get made for you as you settle in on a design.

    For example, lots of 2 dof builds use pgsaw worm gear drive motors you can buy through various outlets and ebay. They are about $100 each. Many also use salvaged windshield wiper motors. Those both have the benefit of integrated gearboxes and output shafts generally suitable for simple output arms that connect to your moving frame.

    Something else about 2 dof rigs is full frame or seat mover? Seat movers don’t need as big of motors or as low of gearing since the mass to move is lower. Full frame is generally better if you favor flight, seat mover generally for driving but there are other factors too - available space. Seat movers can be quite compact. You know your requirements and what you want to use it for. By looking through the Showcase, you can start nailing down the broad stroke design and then start homing in on what parts would be best for that.

    Cheers & good luck!
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  4. dieser

    dieser Member

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    thank you very much for your helpful answer.

    i only use the simulator for racing. and i just need a seat mover.

    i read a lot of threads in the last days, but the mass of information just knocking me down ;)
    i´m really concerned in the choice of the motors, i thought about 12v wipers first, but i read a lot about 12v is to powerless...
    what i´ve read so far, the voltage and the watts are the most important thing in choosing motors, isn´t it?

    do you think 12v and 80w it´s enough for a seat-mover with a simple racing-seat plus 100kg weight(Rig and me)?

    these are the motors i´ve found at a local junkyard...
    and i also read that wipermotors have to be grounded, but i prefer some kind of plug and play at the motors :)

    do you know the name of the parts-calculator?

    thanks for helping a new guy here ;)
  5. Zed

    Zed VR Simming w/Index Gold Contributor

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    Hi Dieser, the 12 volts vs. other voltages is because watts (power) is volts times amps. You need thicker wires for high currents but if you go with a 24v system, currents are half and wires can be thinner. But you then need to get parts rated for the higher voltages. One example is the Pololu 12v12 JRK motor controller / H-bridge. It’s a great controller but not tolerant of 24 volts. So you just need to make sure power supply, motor, and controller all match up. There are exceptions but you need to know what you are doing to mix ratings. And always remember these things can expose lethal voltages and you or kids/pets can get fingers/paws crushed if you have exposed linkages, pinch points, and such.

    I don’t know the calculator location but @noorbeast does. His seat mover is also very well done and would be worth looking at. https://www.xsimulator.net/community/threads/dx-compact-simulator.5866/

    And this area has lots of people asking the same questions as you: https://www.xsimulator.net/community/forums/new-users-start-here-faq.62/

    As to your motor question, I don’t know because your gearbox will matter, arm length, and motion sim dimensions. For my sim I saw lots were getting good results with the pgsaw motors and just went with them. But that sim calculator should be able to help you. I am not at my regular computer but someone else should know where it is but there are lots of posts here with it. It ends up a very common question.
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  6. dieser

    dieser Member

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    thanks for helping me out!
    i’m still not able to find the calculator by forumsearch... can somebody help?

    thats what i want to build:
    found it here on the forum
    upload_2020-1-29_21-55-35.jpeg

    and this is the link to the motor with the 350 watts:

    https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.de/ulk/itm/254441835328

    i found another one, its just 45 watts:

    https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.de/ulk/itm/153746797617

    could this also be enough to move a seat?
    i wonder why wipermotors can do the job with such low specs like 40 watts...

    thanks guys!
  7. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    You will find plenty of helpful information in the FAQs to get you started, in particular check out the design section: http://www.xsimulator.net/community/faq/

    You can go through existing member projects for specific ideas or inspiration: http://www.xsimulator.net/community/forums/diy-motion-simulator-projects.22/

    Or search for specific types of projects using the Google Custom Search function on the Recent page: https://www.xsimulator.net/community/find-new/posts?recent=1

    If something sounds odd then look it up in the glossary: http://www.xsimulator.net/community/faq/glossary-of-acronyms-and-names.66/

    What motor you need also relates to design choices, so use SimCalc to get your head around design Vs Physics: https://www.xsimulator.net/communit...e-linear-speed-and-forces-of-your-design.270/

    Good luck with your project.