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AC Industrial Motors as servos

Discussion in 'SimTools compatible interfaces' started by Rainman, Aug 20, 2011.

  1. Rainman

    Rainman New Member

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    I think I may have posted something about this a few months back but while speaking to one of my industrial suppliers yesterday I had a thought that I could use the analogue output from say a K8055 to give the position information to the first AI on the drive and write a small program into the drive that can use the signal from a pot connected to the second AI on the drive as a feedback ,any comments

    Mark
    Rainman Simulators
    www.rainman.tv
    Rainman, Aug 20, 2011
    #1
  2. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    drop the k8055 mate not fully supported by xsim, big bug in it.
    eaorobbie, Aug 20, 2011
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  3. Rainman

    Rainman New Member

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    I have decided to order a unit this week to test the programming
    Rainman, Aug 21, 2011
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  4. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    no worries mate, just remember ya wont get full pid control so alot of the fine movement of your sim wont be their.
    But if ya not using the pwm outputs ya will ok.?
    Been down this path with a pololu motor controller, not as nice as my jrks, so i shelved.
    Now following the path of using an Arduino which works completely with the uso outputs to 6 axis in test, awaiting a sabertooth for testing as k8055 kill my pololu driver, wrong frequence. Then if works nicely time to but a 3phase motor plus a VFD-E Series AC Drive and hook it to the arduino.
    But still finishing of some docs and dashboard for the arduino.
    eaorobbie, Aug 21, 2011
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  5. Rainman

    Rainman New Member

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    The performance of the unit will depend on the program that I write into the on board PLC within the VSD and the size of the brake resistor ,I already have a few of these running in various industrial machines.
    At this point in time I will be just putting an analogue position signal into the drive and having the motor mimic that signal.
    I am starting with a single phase in 3 phase out 0.5Kw drive and a standard motor with no reduction box ,once I get that part working I will order a 0.5Kw motor with a 30:1 reduction box.
    Rainman, Aug 21, 2011
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  6. Rainman

    Rainman New Member

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    A mate of mine used a circuit with a couple of op-amps to generate a PWM output from an analogue input ,the frequency is adjustable as well as the PWM
    Rainman, Aug 21, 2011
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  7. Rainman

    Rainman New Member

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    I have scored well today, I decommisioned an image application plant that was originally used to put the coating on the torches for the Sydney 2000 olympic games and because it was being scrapped I managed to recover two small right angle ac motor gearboxes and one larger inline unit with brake along with a cabinet full of motor control and Omron branded PLC eqipment, I even got a large 1m travel gear driven linear actuator to use, this will now make it a lot cheaper to do some R&D on using the ac motors as rc equivalent servos.
    [​IMG]
    Rainman, Oct 29, 2011
    #7