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Actuator w/ Feedback for Traction Loss

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Pit, Jun 12, 2014.

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  1. Pit

    Pit - - - - - - - - - - - - - - - - Gold Contributor

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    Hello guys I'm looking for cheap actuators w/ feedback and found something at http://www.gimsonrobotics.co.uk/GLA750-P_12V-linear-actuator_position-feedback.html.

    Traction loss doesn't need much power so this actuator could be probably a good choice...?
    Pit, Jun 12, 2014
    #1
  2. yobuddy

    yobuddy Well-Known Member Staff Member Moderator SimAxe Beta Tester SimTools Developer Gold Contributor

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    At 8mm/s it could only simulate a slowly leaking tire. hehe
    0.3 inch a second is way to slow I'm afraid.
    yobuddy
    • Funny Funny x 1
    yobuddy, Jun 12, 2014
    #2
  3. Pit

    Pit - - - - - - - - - - - - - - - - Gold Contributor

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    LOL, you are completely right :)

    Here the right link: http://www.gimsonrobotics.co.uk/GLA-S_linear_actuator.html

    Faster but w/o feedback. So I think I can delete the thread....
    Pit, Jun 12, 2014
    #3
  4. RacingMat

    RacingMat Well-Known Member Gold Contributor

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    @Pit : you can add feedback with a pot on the pivot :) rather than on the actuator itself
    • Agree Agree x 1
    RacingMat, Jun 12, 2014
    #4
  5. yobuddy

    yobuddy Well-Known Member Staff Member Moderator SimAxe Beta Tester SimTools Developer Gold Contributor

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    they don't look fast enough either.
    ~.75 inches a second - just a faster leaking flat tire. hehe
    yobuddy
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    yobuddy, Jun 12, 2014
    #5
  6. yobuddy

    yobuddy Well-Known Member Staff Member Moderator SimAxe Beta Tester SimTools Developer Gold Contributor

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    For example a scn5 actuator runs at 400mm/sec max. speed.
    A scn6 actuator runs at 200mm/sec max. speed.

    So something in that range of 200 to 400 mm/sec is what you are looking for.
    yobuddy
    • Agree Agree x 2
    yobuddy, Jun 12, 2014
    #6
  7. Pit

    Pit - - - - - - - - - - - - - - - - Gold Contributor

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    ok ok. I got the message :) Probably those actuators won't be cheap so I could delete this thread once again :p
    • Funny Funny x 1
    Pit, Jun 12, 2014
    #7
  8. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    AH under load the SCN5 struggle to push 200mm/s but still damn quick. With the extra torque of the scn6 they push between 100-150mm/s underload.

    I would use a dc motor like others have done , looks impressive with plenty of speed.
    Mines a little way off but have all the components just need to finish a couple of my outstanding projects first then I can play again.
    eaorobbie, Jun 12, 2014
    #8
  9. moon310

    moon310 Member

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    I bought the same Linear Actuator But very slow

    Is it possible to increase the speed of
    moon310, Sep 24, 2014
    #9
  10. moon310

    moon310 Member

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    I can Removing the motor cover and gears

    But how do we increase speed
    moon310, Sep 24, 2014
    #10
  11. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    My Motion Simulator:
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    Test the output speed of the motor you removed, then source a motor that is faster.
    Another I have seen done (good old YouTube) a pully was attached to one end of the actuator and another on a high speed dc motor, see you don't need much torque to turn a ball screw setup. But plenty of input speed to gain a nice and fast motion, but there is a physical limit the actuator will handle too.
    • Like Like x 1
    eaorobbie, Sep 24, 2014
    #11
  12. moon310

    moon310 Member

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    Fantastic
    The same image
    Is it enough speed For simulation

    bugcut.gif
    • Like Like x 1
    moon310, Sep 24, 2014
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  13. bsft

    bsft

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    if the motor is fast enough to move the actuator shaft, then yes.
    bsft, Sep 24, 2014
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  14. moon310

    moon310 Member

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    understand
    Thank you
    moon310, Sep 25, 2014
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  15. bsft

    bsft

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    I converted some actuators I was given by chance a while ago.
    Mind you, they are fast in the first place and industrial strength. I just had to re-motor them with 12v motors.
    I use 4500 rpm motors, 1:1 drive
    983469618_actuators_122_26lo.jpg
    and then do a custom feedback setup to suit the motor controllers, in this case, the JRK
    215627536_potsetup_122_176lo.jpg
    initial test

    link to current build they live on
    http://www.xsimulator.net/community/threads/actuator-2-dof-seat-mover.5065/
    • Like Like x 5
    bsft, Sep 25, 2014
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  16. tronicgr

    tronicgr

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    Like for using x-sim motion software for the video!
    • Funny Funny x 2
    tronicgr, Sep 25, 2014
    #16
  17. riton

    riton Active Member

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    Before you say 400 mm / s for a SNC, you need to look like the torque fall with the load and speed too !!

    must watch manufacturer curve!
    and think about removing power to the load inertia!
    • Agree Agree x 2
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    riton, Sep 25, 2014
    #17
  18. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    Agree @riton I have used a local simX unit was not impressed doent kick as hard as my DC motors (about 200mm/s) owner then came over and had a play on my unit and offered straight away to do a swap, sorry keep ya 20k of crap, sorry mate. His selling the stage 1 kit off the full rig and converting to Dc motors and SimTools , was very impressed.
    • Like Like x 1
    eaorobbie, Sep 25, 2014
    #18
  19. ericRacer

    ericRacer You get old because you stop playing ! Gold Contributor

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    ericRacer, Nov 16, 2014
    #19
  20. SeatTime

    SeatTime Well-Known Member

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    Just be careful, the cheap actuators rarely use a ball screw, they normally use a 'acme lead screw' which is allot cheaper and nowhere near as efficient.
    • Informative Informative x 1
    SeatTime, Nov 17, 2014
    #20
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