Help: Cost Effective AC Servo Speed Control

Discussion in 'General Electronics Chat' started by manc_w1ll, Mar 28, 2014.

  1. manc_w1ll

    Thread Starter New Member

    Nov 15, 2006
    2
    0
    Thanks for reading this.

    I have a Fanuc A06B AC Servo motor. I need to control this outside of the installed control system during the machine commissioning. All I need is very rough sped control to check mechanical fits and limits.

    Please will you advise on the most cost-effective option of motor controller type for this servo. Would I be forced to use the propriety Fanuc servodrive?

    Thanks for your help in advance.

    Will
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,548
    2,373
    The Fanuc AC (RedCap) servo's use various types of encoders, but the type of commutation signal is rather proprietary, they use a 4 bit code on the encoder disc to create a pseudo sine wave.
    It can be overcome, but maybe not worth it if this is just for testing purposes.
    Max.
     
  3. manc_w1ll

    Thread Starter New Member

    Nov 15, 2006
    2
    0
    Thanks for the response Max. Really appreciated.
    I thought that the Fanuc website would have easily accessible datasheets on this range of motors, but no.
    Never having configured any Fanuc drives before, are they easy to set up for Speed control?

    Thanks

    Will
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,548
    2,373
    There is little chance of getting technical information from Fanuc, they make sure everything stays proprietary.
    The only setup for Fanuc servo's is when integrating a full control and the method is laid out in the integration manual for the system.
    Called setting the AMR-DMR.
    I have used the larger motors for small spindles etc, by replacing the encoder and motor to BLDC, there is also a site where you can get a convertor for the Fanuc encoder to run on a conventional system.
    Max.
     
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