Hurco BMC20 Dynomotion Retrofit - Page 4


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Thread: Hurco BMC20 Dynomotion Retrofit

  1. #37
    Gold Member TomKerekes's Avatar
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    I assume you meant the GND of the +24V supply, not -24V

    TK
    http://dynomotion.com


  2. #38
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Oops, yes, the GND/- side.
    Thanks

    http://www.homecncstuff.elementfx.com/


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    Default Servo Drive Ouput Current

    My drives have an output pin for Monitoring the current being used in CW or CCW direction. Pin 21 of drive does this. It outputs 0-3.3V. 0volts being equal to -30amps, 1.65V equal to 0amps and 3.3V equal to +30amps. To wire this to Kanalog i would wire Pin 21 of drive to Kanalog JP6 terminal input 0 and wire GND Pin 9 of drive to a GND pin of Kanalog JP6 terminal?

    Also, if the above connection is correct can it be used to display a percentage load meter in KMotionCNC for an axis?

    Thanks,
    Troy

    http://www.homecncstuff.elementfx.com/


  4. #40
    Gold Member TomKerekes's Avatar
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Hi Troy,

    That should be possible. The KMotionCNC Screen Editor allows you to add DRO type readouts and simple Vertical Bar Graphs. See the Screen ShowInstantFeedRate3AxisBar.scr. And the C Program ShowInstantVelocityDROBar.c to compute a value and put it in the DRO and Set the Vertical Bar Graph. Of course the example computse and displays the current feedrate. You would change that to instead read in the ADC value and scale and display it instead as a Current.

    HTH
    Regards

    TK
    http://dynomotion.com


  5. #41
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Ok. So does the wiring look correct.

    http://www.homecncstuff.elementfx.com/


  6. #42
    Gold Member TomKerekes's Avatar
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Wiring? Yes your description of connecting the 0-3.3V signal to a Kanalog ADC should be ok.

    Regards

    TK
    http://dynomotion.com


  7. #43
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Tom,
    Jumping back to the Alarm pin wiring connection. DMM-Tech got back with me today and they gave me the opposite of what i posted before. I was thinking it should be wired as such....Minus/GND side of 24VDC supply be wired to Pin 5 (COM) of drive, then Pin 18 of drive wired to Kanalog Opto 0 minus pin and plus side of 24VDC supply to Kanalog Opto 0 plus pin.

    DMM-Tech said the following...
    "The alarm to your kanalog should be wired as:
    - Connect positive side of 24VDC to DYN4 pin 18 (alarm)
    - Connect DYN4 pin 5 (com) to kanalog OPTO_IN_PLUS.
    - Connect kanalog OPTO_IN_NEG to 24VDC negative side (Gnd)
    The resistance is already incldued in the kanalog. It says it already has a 10kohm resistance so this is ok."


    What am i missing?

    Thanks again for your help
    Troy

    http://www.homecncstuff.elementfx.com/


  8. #44
    Gold Member TomKerekes's Avatar
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Hi Troy,

    Well that should work also. Think of it like you had a battery, switch, and light bulb.

    24V supply = Battery
    DYN4 = switch
    Kanalog Opto = light bulb

    There are two options where to put the switch. Both will work.

    However I prefer our original arrangement for the following reason: I think their "COM" signal is common to multiple of their outputs (switches). If you try to wire up more than one of their outputs to more than one opto input you will find their method doesn't work.

    Here is a diagram that shows how a number of switches with a common negative terminal will work if the common terminal is connected to GND

    Hurco BMC20 Dynomotion Retrofit-optoins66-png

    HTH
    Regards

    TK
    http://dynomotion.com


  9. #45
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Good. I was understanding the common correctly then. Thanks for the light

    http://www.homecncstuff.elementfx.com/


  10. #46
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Got a few more things mounted.
    Still working on wiring diagram. Currently working on wiring diagram of the TECO A510 VFD and waiting for my MPG pendant so i can get wiring diagram made for it.

    Attached Thumbnails Attached Thumbnails Hurco BMC20 Dynomotion Retrofit-img_0001-jpg   Hurco BMC20 Dynomotion Retrofit-img_0002-jpg   Hurco BMC20 Dynomotion Retrofit-img_0003-jpg   Hurco BMC20 Dynomotion Retrofit-img_0004-jpg  

    http://www.homecncstuff.elementfx.com/


  11. #47
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    Default Controling TECO A510 VFD

    Ok. Looking at the manual to my VFD i can control Speed and Direction of spindle by RS485 or second option would be Speed control by 0-10V and direction/stop control by input terminals on drive. I have plans to add a automatic tool changer down the road. Which option would be the better one?

    Thanks for any info,
    Troy

    http://www.homecncstuff.elementfx.com/


  12. #48
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Troy,
    THe use of modbus over RS485 tends to me more accurate than sending an analog voltage, depending on the hardware involved. The KANALOG has good DACs, but the other advantage is you can monitor pretty much all VFD status, current, speed, current, etc. with Modbus just have to add some code to put that information into KmotionCNC screenset.
    Russ



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