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

Question Who can solve this problem

Discussion in 'New users start here - FAQ' started by Jerry Atrick, Aug 27, 2018.

  1. Jerry Atrick

    Jerry Atrick this is my sim Gold Contributor

    Joined:
    May 3, 2017
    Messages:
    141
    Occupation:
    Retired
    Location:
    Sydney Australia
    Balance:
    1,414Coins
    Ratings:
    +44 / 1 / -0
    My Motion Simulator:
    4DOF
    How can we add "motor and ballscrew inertia" to this equation?

    https://www.xsimulator.net/community/attachments/bildschirmfoto-2018-08-14-um-15-54-13-png.53601/

    Apparently "motor and ballscrew inertia" is important to the true final figure quoted!

    Regards Jerry
  2. My.stAr

    My.stAr Active Member

    Joined:
    Sep 7, 2012
    Messages:
    151
    Occupation:
    Engineer
    Location:
    Germany
    Balance:
    1,064Coins
    Ratings:
    +61 / 0 / -0
    My Motion Simulator:
    DC motor
    This equation is just a simplification. I doubt, that the given >4G will be reached at the end.
    An important factor is the acceleration of the motor. How long does it need to reach to maximal rpm? And here you find the inertia of the motor;)

    But as Dirty figured out in his build thread, the inertia of the upper platform is much more relevant;)

    With a direct drive wheel you can feel the lower inertia, because it only has to move a relatively light rim…
  3. Jerry Atrick

    Jerry Atrick this is my sim Gold Contributor

    Joined:
    May 3, 2017
    Messages:
    141
    Occupation:
    Retired
    Location:
    Sydney Australia
    Balance:
    1,414Coins
    Ratings:
    +44 / 1 / -0
    My Motion Simulator:
    4DOF
    Hi My.stAr thanks again for your help, I'm not sure I will ever completely understand this stuff however yours and the community direction has made it simpler :)

    Jerry.