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

Question Motor works, then when off for some time does not work but can work with prying it?.

Discussion in 'Motor actuators and drivers' started by Trigen, May 9, 2020.

  1. Trigen

    Trigen Active Member

    Joined:
    Nov 25, 2018
    Messages:
    472
    Balance:
    2,826Coins
    Ratings:
    +176 / 1 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    Hello chaps

    Got a bit of an odd issue. I got some brand new wiper motors that runs fine but when i turn them off and back on a few hours later i get no reaction. When i pry it a bit back and forth and such when the power is on i can bring it back to life. The first one just died on me but the second i've been able to use all day but with this issue and i dont think it will last. Any idea why this might be? It can be driven just fine when its off so its not getting stuck. Its quite odd.
    Trigen, May 9, 2020
    #1
  2. Gadget999

    Gadget999 Well-Known Member

    Joined:
    Dec 27, 2015
    Messages:
    1,897
    Location:
    London
    Balance:
    11,610Coins
    Ratings:
    +458 / 9 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino, 6DOF
    i suspect the motor driver is overheating and the motor then goes out of limit and is disabled

    when you move the motor it goes back into the correct limits and starts up again
    Gadget999, May 10, 2020
    #2
  3. Trigen

    Trigen Active Member

    Joined:
    Nov 25, 2018
    Messages:
    472
    Balance:
    2,826Coins
    Ratings:
    +176 / 1 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    Thanks for the reply but neither is the issue. Remember this is after starting up after hours and by wiggle I mean 1 2mm and it don't just start right up again. It's also getting power and does not react to direct power either.
    Last edited: May 10, 2020
    Trigen, May 10, 2020
    #3
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    20,553
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    145,136Coins
    Ratings:
    +10,779 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    noorbeast, May 10, 2020
    #4
  5. Trigen

    Trigen Active Member

    Joined:
    Nov 25, 2018
    Messages:
    472
    Balance:
    2,826Coins
    Ratings:
    +176 / 1 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    They are G isolated. Settings/hw are not needed as it does not react to direct 12v power but using sabertooth 2x32 smc3. Max spike amp 14 temps 60c but happens at 35c and letting it sit too

    Tested now did not work. Wiggled the shaft and it started moving. Suspect a brush issue. Only thing I can think of but I couldn't bring the previous motor back to life yesterday doing the same thing
    Last edited: May 10, 2020
    Trigen, May 10, 2020
    #5
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

    Joined:
    Jul 13, 2014
    Messages:
    20,553
    Occupation:
    Innovative tech specialist for NGOs
    Location:
    St Helens, Tasmania, Australia
    Balance:
    145,136Coins
    Ratings:
    +10,779 / 52 / -2
    My Motion Simulator:
    3DOF, DC motor, JRK
    If a motor won't run on direct 12v then it is time to pull it apart to see why, brushes or windings most likely.
    noorbeast, May 10, 2020
    #6
  7. Trigen

    Trigen Active Member

    Joined:
    Nov 25, 2018
    Messages:
    472
    Balance:
    2,826Coins
    Ratings:
    +176 / 1 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    May be the brushes that have gotten stuck. Best guess is that they dont like the heat and fail
    Trigen, May 10, 2020
    #7
  8. Trigen

    Trigen Active Member

    Joined:
    Nov 25, 2018
    Messages:
    472
    Balance:
    2,826Coins
    Ratings:
    +176 / 1 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino
    Been looking at it some more and the ground brush was completely seized and the low speed one was stuck too. I know metal expands and contracts a bit but this shouldnt happen to the brushes? Im going to file them down a hair on the side and see how that works. Ive had no such issues with my other motors even when smoking hot due to a stuck motor.
    Trigen, May 14, 2020
    #8