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2DOF Motion Platform

Discussion in 'DIY Motion Simulator Projects' started by ilbiga, May 12, 2015.

Page 3 of 4
  1. Pastrana

    Pastrana Member

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    Excuse me, what bridge H, have you used?
    Pastrana, Jan 23, 2017
    #41
  2. ilbiga

    ilbiga Active Member

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    Ciao! I approached to the realization step by step and at the end the choice fell on a Sabertooth 2x25A! :thumbs


    Ciao! Mi sono avvicinato passo dopo passo alla realizzazione ed alla fine la scelta è ricaduta su un Sabertooth 2x25A! :thumbs
    ilbiga, Jan 23, 2017
    #42
  3. ilbiga

    ilbiga Active Member

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    This is an image of the H bridge.
    Ciao

    Questa è un'immagine del ponte ad H.
    Ciao

    dimension-engineering-sabertooth-2x25_2.jpg
    ilbiga, Jan 23, 2017
    #43
  4. Pastrana

    Pastrana Member

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    What difference does it have with IBT2?
    Pastrana, Jan 23, 2017
    #44
  5. ilbiga

    ilbiga Active Member

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    I do not know in detail the ITB2 H bridge, but the sabertooth has the advantage that it can be driven with only 2 wires (serial).

    Non conosco nel dettaglio Il Ponte ITB2, ma il sabertooth ha il vantaggio di poter essere pilotato con soli 2 fili (via seriale).
    ilbiga, Jan 23, 2017
    #45
  6. ilbiga

    ilbiga Active Member

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    The Sabertooth H bridge has 2 channels (can drive 2 motors) and there are several models from 12A to 32A per channel (if I remember correctly) and is already installed with the heat sink.

    Il ponte ha 2 canali (può pilotare 2 motori) e ce ne sono diversi modelli a partire da 12A fiano a 32A per canale (se non ricordo male) è già con dissipatore installato.
    ilbiga, Jan 23, 2017
    #46
  7. ilbiga

    ilbiga Active Member

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    Other small steps...
    ilbiga, Jan 24, 2017
    #47
  8. ilbiga

    ilbiga Active Member

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    bracket for potentiometers...

    Staffa potenziometro.jpg
    • Like Like x 1
    ilbiga, Jan 24, 2017
    #48
  9. ilbiga

    ilbiga Active Member

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    A bit 'rough, but it seems to work ...

    Inst. Potenziometro.jpg Dett. Inst. Potenziometro.jpg
    • Like Like x 1
    ilbiga, Jan 24, 2017
    #49
  10. ilbiga

    ilbiga Active Member

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    Levers (a bit 'ugly :think...) and engine brackets.

    Staffa motore.jpg Leva.jpg
    ilbiga, Jan 24, 2017
    #50
  11. ilbiga

    ilbiga Active Member

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    Ho fatto altre cosucce, ma non ho ancora avuto tempo di pubblicare... :(
    Spero di aggiornare a breve ;)

    I did other little things, but I have not had time to publish ... :(
    I hope to update shortly ;)
    ilbiga, Feb 20, 2017
    #51
  12. mirkobastianini

    mirkobastianini Active Member

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    Per il giunto cardanico, dove lo hai preso? Devo comprarlo anche io e voglio fare l'acquisto migliore...vorrei prenderlo già filettato, cosi da non dover saldare.

    Where do you buy universal joint? I want to buy one in Italy that could be with flange
    mirkobastianini, Feb 20, 2017
    #52
  13. ilbiga

    ilbiga Active Member

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    E' una lunga storia... Il giunto è piuttosto robusto; è stato preso dal piantone di sterzo di un grosso trattore (preso da uno sfasciacarrozze...) ed ha un diametro di circa 5/6 cm.
    Ovviamente ho dovuto saldarlo (è l'ho saldato su una piastra da 6mm di spessore).


    It 'a long history ... The coupling is quite robust; It was taken from the steering column of a large tractor (taken from a scrap yard ...) and has a diameter of about 5/6 cm.
    Obviously I had to weld it (you have welded on a plate 6mm thick).
    ilbiga, Feb 20, 2017
    #53
  14. ilbiga

    ilbiga Active Member

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    Purtroppo sono fermo a causa di un problema meccanico ad un motoriduttore (difettoso di fabbrica :( ).

    Unfortunately I am stopped because of a mechanical problem to a geared motor (defective :( factory).
    ilbiga, Feb 20, 2017
    #54
  15. ilbiga

    ilbiga Active Member

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    Montaggio motori su telaio...

    Engine assembly on the frame ...

    Immagine.png

    Purtroppo non posso caricare il video, ma i motori sembrano funzionare mossi da simtools! :)

    Unfortunately I can not upload the video, but the engines seem to work fine by simtools! :)

    Nel frattempo la struttura ha subito alcune modifiche...

    Meanwhile, the structure has undergone some changes ...

    Struttura new.png
    • Agree Agree x 1
    Last edited by a moderator: Feb 27, 2017
    ilbiga, Feb 27, 2017
    #55
  16. ilbiga

    ilbiga Active Member

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    Sezione audio/Vibe quasi ultimata.... :)

    Audio/Vibe section almost finished .... :)


    File 01-05-17, 17 23 55.jpeg

    File 01-05-17, 17 23 22.jpeg
    • Like Like x 1
    ilbiga, May 1, 2017
    #56
  17. ilbiga

    ilbiga Active Member

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    After so long time, I can finally post some progress.
    There are still a few things to put in place, but they start to work.
    It's just a short video.... I will post more details as soon as possible. ;)

    • Like Like x 1
    ilbiga, May 25, 2017
    #57
  18. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Great to see your rig in action, well done :thumbs

    Now comes the motion profile refinement, and it will help others give advice if you post all your settings plus a video clearly showing the movement and game screen at the same time.

    Just a suggestion, once lever movement exceeds about 40 degrees up or down it is pretty inefficient in terms of torque. You may want to reduce yours a bit before you get into motion profile refinement.
    noorbeast, May 25, 2017
    #58
  19. ilbiga

    ilbiga Active Member

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    Thanks for the advice.
    At this time the maximum excursion is calibrated for 160° (max Up to min Down).
    I've tuned it to get the maximum pitch when I drive uphill and downhill (with the oculus rift the feeling of uphill and downhill is great!).
    Do you think it's better to drop it to max 80°/90 °?
    The motors torque should be sufficient (always if I get them to 24v...;)).

    As soon as possible I will upload all the data you have suggested and a better video. :grin
    ilbiga, May 25, 2017
    #59
  20. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    It is up to you to decide how you want to tune your rig but over 40 degrees up and down the motors are under additional strain as they are not able to effectively use torque, that is just physics, and the less effective they are the more they will possibly struggle in delivering precise movement.

    Personally I prefer and recommend fast but precise movement for VR over larger axis but less controlled movement.
    • Like Like x 1
    • Agree Agree x 1
    noorbeast, May 25, 2017
    #60
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