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Is this motor too much?

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by EgoTempest, Jul 9, 2023.

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  1. EgoTempest

    EgoTempest New Member

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    So I can get a hold of 24 Volt, 250 Watts, motor Speed 2700 RPM, apparently 300 RPM at the output, 14.3 Amp electric bike motor kits for a reasonable price ($93 AUD). Is the output RPM too much? I'm a total newb and trying to buy parts.
    Otherwise, all I can afford here in AU is a typical windscreen wiper motor running 12V 40W, 45 RPM at about $52 each.
    The price difference for the speed power increase is fantastic bit I need to know if it's usable or too much for a sim project.

    Thanks.

    Attached Files:

    EgoTempest, Jul 9, 2023
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    It is hard to realistically talk about motors independent of design, SimCalc is a way to get your head around the tradeoffs between design and physics to work out the necessary motor required to drive a given design at desired performance: https://www.xsimulator.net/communit...e-linear-speed-and-forces-of-your-design.270/

    Being in Australia you have access to Motion Dynamics and the range of motors they have available. Many have used these motors, for shoulder, feet and knee type designs, the same motors with 60:1 gearboxes is what I use on my compact design 3DOF: https://www.motiondynamics.com.au/worm-drive-motor-12v-24v-200w-180-rpm-20nm-torque.html
    noorbeast, Jul 10, 2023
    #2
  3. EgoTempest

    EgoTempest New Member

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    Thanks @noorbeast
    I have seen these motors recommended. So $150 is the AU price, nice too know incase I can't get this to work.
    I am more concerned about the output RPM. Has anyone made a unit with an output of 300 RPM? I mostly hear about 45 to 150.
    I'm pretty sure my design will be dictated by the motors I can afford.
    Last edited by a moderator: Jul 10, 2023
    EgoTempest, Jul 10, 2023
    #3
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    It is not so much the RPM itself, but rather the required torque that needs suitable gearing to drive a given design.

    As I already suggested please try SimCalc as a way to get your head around design Vs physics, careful planning and parts selection is far more economical than guessing: https://www.motiondynamics.com.au/worm-drive-motor-12v-24v-200w-180-rpm-20nm-torque.html
    Last edited: Jul 10, 2023
    noorbeast, Jul 10, 2023
    #4
  5. EgoTempest

    EgoTempest New Member

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    Thanks again, but let's say I'm a complete newb and I just want a cheap racing sim but have no idea of physics. The physics calc is all foreign to me. But if someone who understands it typed in the motors specs would they perceive them as usable or is it totally wrong for a sim build?
    These are a great deal but if they're not realisable then I'll just get the windscreen wiper motors. The proper motors at $150 each are way too much for my budget.
    EgoTempest, Jul 10, 2023
    #5
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    As I indicated gearing would be necessary and may limit design choices, how much depends on the intended design, the full specs of the motors and desired performance.

    Tools like SimCalc cost nothing and have been developed by members here to help newbs make sensible choices, rather than waste a lot of time and money.

    Be aware wiper motors usually require ground isolating and need a lot of inherent design leverage: https://www.xsimulator.net/community/faq/wiper-motor-mandatory-ground-isolation.25/
    noorbeast, Jul 10, 2023
    #6
  7. EgoTempest

    EgoTempest New Member

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    Let me see if I get this, you're saying the current "gear box" or "torque converter" on the motor would not be sufficient and another would need to be built?
    So the engine is a no good "as is" unlike the windscreen wiper motors that can just be hooked up by newbies.

    Maybe there are some other people who have used this type of motor that could chime in please. Maybe have tried it or something similar.
    I have seen the exact engine sold as a wheelchair engine, but it had a 170RPM output not a 300 like this one. I doubt torque would be an issue on it but I haven't heard of anyone running one with an output at 300RPM on a sim, meaning it might need gearing down and I can't make gears for a unit this powerful. 3D print only.
    EgoTempest, Jul 10, 2023
    #7
  8. Gadget999

    Gadget999 Well-Known Member

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    My Motion Simulator:
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    The gear ratio is 2700/300 = 9:1

    You need a gear ratio between 30:1 and 60:1 for a 250 w motor

    They are not suitable imo
    • Agree Agree x 1
    Gadget999, Jul 10, 2023
    #8
  9. EgoTempest

    EgoTempest New Member

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    OK, thanks everyone.
    I got the windscreen motors, got a deal for $45ea so a lot cheaper than the other option.
    Maybe if I can get something going I might look at upgrades in the future.
    Wish me luck. ;)
    • Like Like x 1
    EgoTempest, Jul 10, 2023
    #9
  10. Harman singh

    Harman singh New Member

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    have you seen this, I think this will you and as in thumbnail and in video these motor look like windscreen motor
    I had not seen full video or series this but it was suggestion to me while I was watching YouTube and saved it.
    Harman singh, Apr 8, 2024
    #10
  11. Harman singh

    Harman singh New Member

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    I think this will help you also it based on arduino

    if you already build this please share with us
    Last edited: Apr 8, 2024
    Harman singh, Apr 8, 2024
    #11