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DC Motor or hydraulics?

Discussion in 'DIY Motion Simulator Projects' started by AFS, Jul 21, 2015.

  1. AFS

    AFS New Member

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    Hello everybody! My name is Allan, I am Brazilian and I want to build a racing simulator 2DOF + traction loss, inspired by @SilentChill model. I'm still studying and learning phase, but would like some tips to mark this beginning.
    In Brazil it is not very easy to find quality equipment, and when they are found, they are much more expensive than in the USA, for example. I can buy electric motors from Bosch, affordable ($ 55.00), as specified below:

    MOTOR BOSCH CEP 006 310 WMO 24V 45RPM
    Nominal torque: 10Nm - 48Nm peak
    Rotation: 45 rpm
    Power supply: 24VDC
    Nominal Current: 5.0A
    Peak: 18.6A
    Power: 46W
    Shaft diameter: 10mm
    Fixing: Via Front with 03 M6 screws (Equidistant the 120th and center line 50mm)
    Weight: 1.2Kg
    Wire quantity: 02
    Direction of Rotation: L / R (clockwise / counterclockwise)

    I am a helicopter pilot and could get some components of the helicopter hydraulic system, but no aircraft usefulness (end of life time limit). If would be the hydraulic servos, pump, tank and lines. Below are the servo specifications:

    Dunlop PN AC67244 / AC67246
    Weight: 1,9 kg
    Operating pressure: 40 bar
    Piston section: 4.5 cm2
    Input effort: 0.3 daN
    Strength in nominal pressure (40 bar): 1800 N
    Maximum effective travel: 110 mm

    This electric motor is sufficient for the project? I got to find another engine, more robust, but costing $ 350.00 each.
    The hydraulic servo seems very powerful, but do not know what complications could face in carrying out the project until the first project to be done for me.
    In short: it is worth trying to use the hydraulic system or should I start with the electric motor it? What should I look for in power an electric motor for this?

    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-


    Olá para todos! Meu nome é Allan, eu sou brasileiro e estou querendo construir um simulador de corrida 2DOF + traction loss inspirado no modelo do @SilentChill. Ainda estou em fase de estudo e aprendizagem, mas gostaria de algumas dicas para balizar este início.

    No Brasil não é muito fácil encontrar equipamentos de qualidade, e quando são encontrados, custam muito mais caro que nos USA, por exemplo. Consigo comprar motores elétricos da marca Bosch, com preço acessível (US$ 55,00), conforme especificações abaixo:


    MOTOR BOSCH CEP 006 WMO 310 24V 45RPM
    Torque Nominal : 10Nm - Pico: 48Nm
    Rotação : 45 RPM
    Tensão de Alimentação : 24VDC
    Corrente Nominal : 5.0A
    Pico :18.6A
    Potência : 46W
    Diâmetro do eixo : 10mm
    Fixação: Via Frontal com 03 parafusos M6 ( Equidistantes a 120o e Linha centro 50mm )
    Peso: 1.2Kg
    Quantidade de Fios : 02
    Sentido de Giro : L/R ( horário/anti-horário )


    Sou piloto de helicóptero e poderia conseguir alguns componentes do sistema hidráulico de helicóptero, porém sem serventia aeronáutica (fim do tempo limite de vida). No caso seriam os servos hidráulicos, bomba, reservatório e linhas. Segue abaixo as características do servo:


    Dunlop PN AC67244/AC67246
    Peso: 1, 9 kg
    Pressão de utilização: 40 bar
    Seção do pistão: 4,5 cm2
    Esforço de entrada: 0.3 daN
    Força na pressão nominal( 40 bar): 1800 N
    Curso útil máximo: 110 mm


    Esse motor elétrico é suficiente para o projeto? Cheguei a encontrar um outro motor, um pouco mais robusto, porém custando US$ 350,00 cada.
    O servo hidráulico me parece muito potente, porém não sei quais complicações poderia enfrentar na realização do projeto, até por ser o primeiro projeto feito por mim.
    Enfim: vale a pena tentar utilizar o sistema hidráulico ou devo iniciar com o motor elétrico mesmo? Qual potência devo buscar em um motor elétrico para tal?
  2. bruce stephen

    bruce stephen Hammer doesnt fix it, must be electrical

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    I would say hydraulic would be complicated and would not react as quickly but it's been done. I think electric motor is the way to go. What you use from there depends on design, your expectations, and mostly your budget. @SilentChill project used 12volt dc motors Arduino and monstermoto shield. 24 volt motors will not work with the monsters. The motor you have listed seems plenty strong for a well balanced 2dof.
    Last edited: Jul 21, 2015
  3. AFS

    AFS New Member

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    Thank you @bruce stephen! Right, so electric is better and easier in this case. Instead of this 24V motor I could buy this 12V:

    Nominal torque: 9 Nm - 36 Nm peak
    Rotation: 75 rpm
    Power supply: 12VDC
    Nominal Current: 18A
    Peak: 50A
    Weight: 1.Kg
    Wire quantity: 02
    Direction of Rotation: R (clockwise)


    But it just turn in one direction. I think I'll have to use a "H Bridge"(I don't know if it's the right name), but I sow in other forum that the motor will run in different speeds clockwise and ccw using this way. I think it may be a problem, don't?
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  5. AFS

    AFS New Member

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    @noorbeast, I forget to tell, but both motors have a 63:1 gear ratio and that was their output rpm. They are bosch branded, I think they are reliable, because other people made simulators with them.
    Brazil is a great country, with nice beaches, lots of rain forest, but other things are not so nice. Customs usually takes 2 months (yes, months, not weeks) to finish the process and delivery my orders. I am usually taxed at 87% with import taxes.. So, Brazil is good to visit, as tourist, not to live :)
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    No problem, I can appreciate how frustrating and costly that would be. Are there any other locally available reversible motor options?
  7. AceOfSpies

    AceOfSpies Living the Dream!

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    Hi @AFS, I would say that 45rpm output is a bit slow, although it can be used. Normally we would aim for a minimum rpm of 80 or 90 to get a good snappy response on the sim.

    Mike
  8. bruce stephen

    bruce stephen Hammer doesnt fix it, must be electrical

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    I use 41rpm motors they are plenty fast. A longer lever makes up for a slower motor.
    • Like Like x 1
  9. AFS

    AFS New Member

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    I'll try to find, but for now my only option is the 24v motor. Reversible motor really make the difference, doesn't it?
  10. bruce stephen

    bruce stephen Hammer doesnt fix it, must be electrical

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    Yes must be reversible. You can use the 24v motor. You would need Arduino to sabertooth. Pololu may make a 24v solution also.
  11. AFS

    AFS New Member

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    Hello @AceOfSpies! I think the same way as @bruce stephen : less rpm, longer lever, just the load will be higher. Am I wrong?
  12. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  13. bsft

    bsft

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    How would the load be higher? And on what?
  14. AceOfSpies

    AceOfSpies Living the Dream!

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    @AFS, as @noorbeast said, if you have a longer lever, you have less available torque, and depending on how you mount your motors, they might struggle to move your sim. Also depends on if your sim is for racing or flight - faster movements for racing, slower movements for flight.

    Mike
  15. AFS

    AFS New Member

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    @bsft, I think I expressed myself poorly, with a little help from Google Translator. What I wanted to mean is the increase of the linear speed decrease the available torque.
    What is good for a linear speed for a racing sim?
  16. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  17. mariano68

    mariano68 Active Member

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    I have been Natal 15 years ago, great place for vacations! I went to Brasil at least 5 times, I love your country!
    Same happen here about customs, end up paying double, IF they customs guys didn't just steal what I bought...
    About linear speed, around 150/200mm/s is fine.
    Yes, the longer the lever, less torque you get, I presume that you will build a full frame moving sim, I think your best option would be to build foot mount motors, like @Archie 's http://www.xsimulator.net/community...ing-stuff-countdown-to-2dof-build.6177/page-4
    I'm doing the same, using electric jack motors, they are cheap and really strong.
  18. SeatTime

    SeatTime Well-Known Member

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    Are you going for a spam record?
    • Agree Agree x 2