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4DOF by gigifux

Discussion in 'DIY Motion Simulator Projects' started by gigi, Feb 7, 2017.

  1. gigi

    gigi Active Member

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    Yes I'm agree with Pit sabertooth is the first choice and probably the only good choice for these motors. Jrk are the best for me, but only in their range of operation. Asking to these card to control big motors
    imposes limits and creates problems in addition to the continuous risk of burn
  2. gigi

    gigi Active Member

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    Yes the motor are really strong. the problem is that might be also too fast with a 18cm lever
  3. gigi

    gigi Active Member

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    springs for save gearbox of traction loss
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  4. SeatTime

    SeatTime Well-Known Member

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    Those springs are going to introduce more problems then what they are worth - especially once you put a load on there. The ideal slack/play in a sims drive train is zero - Its one of the reasons I picked ballscrews:).
    Last edited: Apr 2, 2017
  5. SeatTime

    SeatTime Well-Known Member

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    Haven't seen a sim that was 'too' fast. Lets see if the motors are 'too' fast once you get a load/passenger at full noise on there. Inertia is an equaliser :).
  6. gigi

    gigi Active Member

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    Really I don't like very much my solution. My motors are 90zyt with ratio 60:1 anda have 80rpm. For traction loss and surge I'm obliged to use 18cm levers if I vant 15cm left, 15cm right for tl and 15cm forward,15cm backward for surge. I fear that forward/backword or left/right very fast might broken the gearbox. Can you pelase show me your solution using ballscrews?
  7. gigi

    gigi Active Member

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    Hi
    I post here my last two thread ragarding some problems that I'm not able to fix
    A few years ago I made a 2dof simulator with zyt73 motors and jrk 12v12 cards.
    This new project includes zyt90 motors and sabartooth 2x32 cards. With this kind of configuration I am a newbie and I need your support.
    I post here my last two thread ragarding some problems that I'm not able to fix
    Thank you
    https://www.xsimulator.net/community/threads/sabertooth-2x32-battery-in-parallel.10564/
    https://www.xsimulator.net/community/threads/simtools-not-work.10577/
  8. gigi

    gigi Active Member

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    Hallo everyone,
    Here is the first gaming test last night.
    Since the parameters have yet to be set, the amplitude and speed of each movement must still be calibrated.
    What I surely enjoy and leaves me satisfied is that despite how you see the structure is provisionally raised from the ground, resting on two water chambers and despite the exaggerated movements it remains stable and does not break down, a sign of a good balance of the ' together

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  9. nicolasp

    nicolasp New Member

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    My Motion Simulator:
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    Hi gigi, Congratulations on your 4dof simulator, I have a 2dof simulator with 2 gearmotors 24v and in the electric schematic.
    I am using the arduino uno and 2 H bridges ibt2 43a and I want to make an up-grade for 4dof
    Please, can you tell which ino code and which electric schematic you used in your 4dof simulator
    Last edited: Aug 14, 2017
  10. Jerry Atrick

    Jerry Atrick this is my sim Gold Contributor

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    Hi gigi, (before I comment; I just want to say I KNOW NOTHING) However I'm a little confused:confused:; You say these motors are strong!

    It states the motor is rated to 0.4 Nm, I've been asking about motors rated @ 50Nm and above, and these motors the community has stated as "unsuitable".

    Now I mean NO offense, I am just trying to understand the process of choice, can someone fill me in!

    Regards Jerry.
  11. gigi

    gigi Active Member

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    Hi Jerry,
    First of all sorry if I answer more than 2 mounths later your question.
    When for these motor You read 0,4 Nm it's not refered at gearbox but at motor. You You want know teh torque at gearbox you must multiply the torque at motor x gearbox ratio. bigger ratio mean less velocity but bigger torque
    The r90ZYT-155-12 motor is 12V and should have 23A rated. this mean 275W .
    The motor should have +/-5100 rpm (not verified).But I verify +/- 80 rpm at gearbox so this should mean 4800 rpm at motor.
    If you try this calcolator http://www.claredot.net/it/sez_Elettrotec/calcolo-parametri-motori.php
    you can verify that the motor at 4800rpm have 0,547 Nm and at 80rpm (at gearbox) the torque is 32,826 Nm
  12. gigi

    gigi Active Member

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    hallo to everyone.
    I would ask you this question.

    As you know I use 4 motors 90ZYT-155-12 mcp4 60:1 motors 12Volt with 2 sabertooth 2x32 and arduino uno

    I used the arduino code suggested from Wanegain https://www.xsimulator.net/communit...bertooth-using-simplified-serial-working.136/ in wich I change only the range of motor (I set Minpot = 256, MaxPot = 768)

    The motors of sim are
    -Motor 1 and motor 3 are for roll pitch heave surge and sway roll 25%, pich 25%, surge 25%, heave 20%, sway
    20% total 125%
    -Motor 2 is only for traction loss (extra1) and is set to 100% and boundary filter at 50%
    - Motor 4 is only for surge, is set to 100% and boundary filter at 50%
    Now I see that to have decent movement I need to set in tuning center of simtools the value very very low.
    With the values I set and you see in the photo posted the simulator work fine but I'm asking is if such low values are limiting and make me loose some details. It's correct? do you think I should change some value of
    P, I,D,?
    I also tried to capture max/min in gaming, reset value, then driving and then save the value i obtain
    but the resulting values are highter than those imposed manually. If I save and try to to use these high value the sim moves very little and very slowly.

    Attached Files:

  13. dualclick76

    dualclick76 Active Member

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    Compliments Gigi you did a good job, I like it all, I see a little underdened the rods pushing the seat, with some more accurate tuning it will be really fun. ;););)
  14. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    The lower the TC value the faster the sim response, but over a smaller axis movement.
  15. gigi

    gigi Active Member

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    Hi Norbeast thanks for reply. But in my TC the value are very very low. My question is if such low values are limiting and make me loose some details?
  16. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    Smaller TC values will sharpen movement, hence help simulate fine details, but will operate over less movement range, so you do lose some gross movement, hence it is a balancing act to find and use what feels right for your sim.

    That said your TC values look too low.

    As you have a dedicated surge axis I would expect that to do most of the work and have a far lower Axis Assignment for surge for the motors doing the other axis, plus a lower Axis Allocation for heave and a higher Axis allocation for sway.
  17. simupp

    simupp New Member

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    Hello !, could you tell me where did you by a seat ?. Thanks.
  18. gigi

    gigi Active Member

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  19. gigi

    gigi Active Member

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  20. gigi

    gigi Active Member

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