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MK and SUMO 12

Discussion in 'Electronics' started by Dave King, Mar 11, 2015.

  1. Dave King

    Dave King Well-Known Member

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    I am building a new copter for a client and I ran into something that I never really understood why. I have never been able to get SUMO 12 to work with the MK flight control board. I can get SUMO8 to work but not SUMO12. Yes I am switching the servo cable to servo 12 connection on the receiver when I try SUMO12. The only thing I could ever get to work is SUMO8 with the servo connector hooked into servo 8 output on the receiver.

    Any idea?
     
    #1 Dave King, Mar 11, 2015
  2. Ozkan Erden

    Ozkan Erden Distributor

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    What transmiiter are you using?
     
    #2 Ozkan Erden, Mar 11, 2015
  3. Dave King

    Dave King Well-Known Member

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    MX20
     
    #3 Dave King, Mar 11, 2015
  4. Thijm le Grand

    Thijm le Grand Member

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    Sumo numbers are related to the receiver output channel and depends on the used receiver. Witch one are you using?
     
    #4 Thijm le Grand, Mar 11, 2015
  5. Dave King

    Dave King Well-Known Member

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    GR24L and I also tried older GR24.
     
    #5 Dave King, Mar 11, 2015
  6. Thijm le Grand

    Thijm le Grand Member

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    That's weird!!
    what are the advantages of using 12 instead of 8?
     
    #6 Thijm le Grand, Mar 11, 2015
  7. Arthur Vieira

    Arthur Vieira Flight Squad

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    Humm.....
    Recently I've installed a GR24 on a MK FC 2.1 with a MZ24.
    I do understand completely different the use of the SUMO config. The SUMO sums X channels in PWM to a PPM signal on the CH8 connector on the GR24.
    If you put SUMO 8, the CH8 connector will output the first 8 channels in PPM, if you config as SUMO 12 the CH8 connector will output all 12 channels of the MZ24 in PPM format. For this to work you have to set it on the telemetry section of the radio then power off the RX and the FC, once you power it on again you can see the change in MKTools .

    Cheers,
     
    #7 Arthur Vieira, Mar 11, 2015
  8. Dave King

    Dave King Well-Known Member

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    Only so that you can use more channels if you need them for instances where a copter is setup for a one man pilot-camera man combo. I only use channels 1-6 myself. The customer asked for more channels which is why I was asking.
     
    #8 Dave King, Mar 11, 2015
  9. Dave King

    Dave King Well-Known Member

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    AH so that's it? You just need to use the CH8 connector in SUMO16. thanks.
     
    #9 Dave King, Mar 11, 2015
  10. Thijm le Grand

    Thijm le Grand Member

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    Ok. Did not know this was related to the amount of channels. Only sum output
     
    #10 Thijm le Grand, Mar 11, 2015
  11. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Ooops. I was wrong. MX-20 manual at page 218:

    On receivers whose display shows "SUMO" at the​
    top right, an additional two-digit number appears​
    … the active field changes after confirmation of​
    "SUMO" by briefly pressing the central SET key​
    of the right touch pad for the channel selection.​
    With this selection you specify the highest of the​
    transmitter channels contained in the SUMO signal:​

    The PPM always goes out on servo 8's connector.

    I've deleted my previous posting as it was flat wrong. Sigh.

    Andy.
     
    #11 Andy Johnson-Laird, Mar 11, 2015
  12. Arthur Vieira

    Arthur Vieira Flight Squad

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    PS. TRIPLE CHECK THE FAIL SAFE SETTINGS.
    There was a defective old firmware that didn't send the lost radio to the MK. I don't remember if it was a TX or RX firmware.
    To test is very easy, just connect the Mk Tools, start monitoring in the OSD screen and turn off the TX. It should go into fail safe otherwise update the firmware.
     
    #12 Arthur Vieira, Mar 11, 2015
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