1. Do not share user accounts! Any account that is shared by another person will be blocked and closed. This means: we will close not only the account that is shared, but also the main account of the user who uses another person's account. We have the ability to detect account sharing, so please do not try to cheat the system. This action will take place on 04/18/2023. Read all forum rules.
    Dismiss Notice
  2. For downloading SimTools plugins you need a Download Package. Get it with virtual coins that you receive for forum activity or Buy Download Package - We have a zero Spam tolerance so read our forum rules first.

    Buy Now a Download Plan!
  3. Do not try to cheat our system and do not post an unnecessary amount of useless posts only to earn credits here. We have a zero spam tolerance policy and this will cause a ban of your user account. Otherwise we wish you a pleasant stay here! Read the forum rules
  4. We have a few rules which you need to read and accept before posting anything here! Following these rules will keep the forum clean and your stay pleasant. Do not follow these rules can lead to permanent exclusion from this website: Read the forum rules.
    Are you a company? Read our company rules
Shared accounts will be removed Plugin Downloads Zero spam policy Forum Rules

2dof limit axis problem

Discussion in 'Ready, set, go - Start your engines' started by gaboff_k, Feb 16, 2023.

  1. gaboff_k

    gaboff_k Member

    Joined:
    Nov 8, 2022
    Messages:
    32
    Balance:
    120Coins
    Ratings:
    +8 / 0 / -0
    Hello!

    Please help with advice.
    On my stand 2dof Cheetah hop I can't make a normal amplitude for engines.
    In smc3utils I set limits to 100 max limit/clip imput. If you put less, then the thrust may touch the plate and if the engine does not turn off, then there may be unpleasant consequences.
    In sim tools there are limits of 70%, which is very small and greatly limits the movement of the axes. That is, the value of the limiter is very far away. But as soon as I increase the value more than 70%, then one of the engines (one or two) periodically turns off during the race. Although, according to the test in sim tools, the limit is still very far away. What could be the problem?
    I admit that due to the fact that the engines do not have a stop and their zero resistance is very weak (the gearbox is easily scrolled by hand), then at the time of operation at a large amplitude, the engine simply scrolls beyond the limit by inertia. What can be tweaked?

    Thank you!

    PS: Sorry for my English.

    Attached Files:

    gaboff_k, Feb 16, 2023
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    21,395
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    150,025Coins
    Ratings:
    +10,993 / 54 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    Can you please post pictures of SMC3 running Sine.

    You should set the limits in SMC3 rather than SimTools.

    Can you please post pictures of all of your SimTools settings.

    Was the rig properly balanced, with the user and all peripherals on board: https://www.xsimulator.net/communit...-of-gravity-to-balance-a-motion-simulator.55/

    When the motor turns off is it triggered by violent in game motion, a USB disconnect (normally audio warning), or perhaps PSU shutdown?
    noorbeast, Feb 16, 2023
    #2
  3. gaboff_k

    gaboff_k Member

    Joined:
    Nov 8, 2022
    Messages:
    32
    Balance:
    120Coins
    Ratings:
    +8 / 0 / -0

    When the engine is turned off, there are no extraneous sounds, the power supply continues to work. Usb won't turn off. And the second engine continues to work in the game and I do not always immediately notice that the second engine is turned off. Under the rack's own weight, when turned off, the thrust goes far beyond the working limits. I turn off the power, level the rack, bringing the motor axes back within tolerance, run scm3utils and the motors immediately center properly.

    Q: Sim tool limits are expressed as a percentage. Are these percentages from the maximum encoder travel or from the value set in smc3utils?

    Attached Files:

    gaboff_k, Feb 16, 2023
    #3
  4. gaboff_k

    gaboff_k Member

    Joined:
    Nov 8, 2022
    Messages:
    32
    Balance:
    120Coins
    Ratings:
    +8 / 0 / -0
    70%
    70%

    These are the operating settings at which the rack operates stably. Problems start at >70%
    gaboff_k, Feb 16, 2023
    #4
  5. gaboff_k

    gaboff_k Member

    Joined:
    Nov 8, 2022
    Messages:
    32
    Balance:
    120Coins
    Ratings:
    +8 / 0 / -0
    For power supplies. There are two for 24V 360W. Engines 24V 250W. There is a stock. Bts7960 each in a ventilated case.

    Attached Files:

    gaboff_k, Feb 16, 2023
    #5
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    21,395
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    150,025Coins
    Ratings:
    +10,993 / 54 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    noorbeast, Feb 16, 2023
    #6
  7. gaboff_k

    gaboff_k Member

    Joined:
    Nov 8, 2022
    Messages:
    32
    Balance:
    120Coins
    Ratings:
    +8 / 0 / -0
    gaboff_k, Feb 16, 2023
    #7
  8. gaboff_k

    gaboff_k Member

    Joined:
    Nov 8, 2022
    Messages:
    32
    Balance:
    120Coins
    Ratings:
    +8 / 0 / -0

    Thank you very much for your help!
    The problem was solved by redistributing the % along the axes Axis1 Axis2 as mentioned in your links. It is logical that there cannot be a distribution of % dof along the axes greater than 100% in total. Now everything is stable.
    gaboff_k, Feb 16, 2023
    #8
  9. zapata_h

    zapata_h Active Member

    Joined:
    Dec 25, 2013
    Messages:
    221
    Occupation:
    Industrial Maintenance Manager
    Location:
    España
    Balance:
    308Coins
    Ratings:
    +43 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor, Arduino
    Keep in mind that depending on the speed of the output shaft you will have to adjust the clip zone, this motor has more rpm than a wiper motor.
    zapata_h, Feb 16, 2023
    #9
  10. gaboff_k

    gaboff_k Member

    Joined:
    Nov 8, 2022
    Messages:
    32
    Balance:
    120Coins
    Ratings:
    +8 / 0 / -0
    Thank you. Didn't think about it. I will definitely test
    gaboff_k, Feb 17, 2023
    #10