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Error 31 on first start up

Discussion in 'Cinestar 8' started by Dave Wallace, Apr 30, 2014.

  1. Dave Wallace

    Dave Wallace New Member

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    HI,
    I have just built a CS8HL. The motors test fine,but I can't start the copter because of the compass error 31.
    If I select the compass error box in MKtool it still will not start.
    Also when I do a compass calibration I am not getting any beeps.
    Can anyone help

    Thanks in advance.
     
  2. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Hi Dave:
    First off -- do you hear any beeps when you first power up the CS8? Do you know the beeper is actually working?

    Secondly, have you calibrated the ACC with the Flight Control Board absolutely level?

    Thirdly, can you describe the process that you are using to get into the compass calibration process?

    Sorry to bombard you with so many questions.
    Andy.
     
  3. Dave Wallace

    Dave Wallace New Member

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    Hi Andy,
    Yes the beeper is working.

    Yes I have levelled the A/C using the battery tray and calibrated the ACC.

    I am using the NEW method to calibrate the compass.

    Also the second LED light on the NC is RED??
     
  4. Steve Maller

    Steve Maller UAV Grief Counselor

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    What is the “new” method?
     
  5. Ozkan Erden

    Ozkan Erden Distributor

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  6. Ozkan Erden

    Ozkan Erden Distributor

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  7. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    I don't have my copter in front of me, but that red LED on the NC suggests that something bad is going on with the NC.
    When you connect up to the copter with MK Tool, can you confirm that you are seeing the correct movements on the Channels window for the transmitter sticks -- one possibility is that the copter is not receiving the correct signals for "Start Compass Calibration," (left stick top left hand corner, right stick all the way back).

    You should get one beep after the simultaneous left-stick-up-and-left and right-stick back. Do you get that beep?

    Andy.
     
  8. Dave Wallace

    Dave Wallace New Member

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    Yes this is the method I'm using.
     
  9. Gary McCready

    Gary McCready Active Member

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    Dave: I just went though compass calibration hell >
    1. Update your firmware 2.06 , there was a compass calibration bug in 2.02
    2. If you are using an external compass then check you cable, my red wire was out ever so slightly.
    3. using MKtools check screen 23 on the Navi board, what does it show?
    4. check your channels in MKT, make sure you are reaching your endpoints

    Not sure about the Red LED, but I think it flashes because compass is not calibrated. > check in MKT
    Another video helper:
     
  10. Dave Wallace

    Dave Wallace New Member

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    Andy, i get the beeps when I first move the sticks Left up and right down but when I continue with calibration there is no more beeping.
     
  11. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    You say, "beeps" -- but it should only beep once with Left-up-and-right and Right-back. If it beeps more than once, then you're not getting into the compass calibration mode.

    Assuming it only beeps once, I presume that when you then move Right-stick-back, you don't hear any little clicking noises when you rotate the copter?

    See GaryM's comments above, too.
    Andy.
     
  12. Dave Wallace

    Dave Wallace New Member

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    Andy,
    When I start the calibration I get three beeps not one.
    Gary,
    I have updated firmware to 2.06
    MKTools check screen 23 saids EXT.Compass Not Connected...
    The right stick movements go from 66 to190 in both directions. Is this ok for calibrating??
    I read o MK that the RED LED means the the compass is not calibrated...
    I will try to recalibrate today with the new firmware.
     
  13. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Dave:

    I don't have my system set up right now, but that right stick looks like it could be a problem.
    I'm going from memory (so anyone else, please leap in and correct me), but in MK Tool in the Channels window, going from memory, the right hand stick fore and aft should be:

    1. In the center of the vertical indicator for Channel 3 when the stick is centered.
    2. At the bottom of the vertical indicator for Channel 3 if the stick is all the way back.
    3. At the top of the vertical indicator for channel 3 if the stick is all the way forward.

    Is this what you see?
    If not, confirm that you have the transmitter in Mode 2 (check the manual for that).

    My current working hypothesis as the the receiver is not seeing the correct configuration to get the flight control board into compass calibration -- hence the three beeps, because it thinks you're just doing a pre-flight gyro re-calibration.

    Andy.
     
  14. Dave Wallace

    Dave Wallace New Member

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    Andy,
    I have a Cyberquad with MK boards and the stick have the same limits set and I have no trouble doing a compass cal.
     
  15. Dave Wallace

    Dave Wallace New Member

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  16. Gary McCready

    Gary McCready Active Member

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    You channels tab in MKtools should show your sticks going from 127 to zero at the bottom and 254 at the top. You might have to adjust your throws on your transmitter so these points are reached. I couldn't arm my copter the other day because I had some how pushed the right trim button all the way up, so it was no longer "centered".

    Ext compass not connected > Do you have an External compass, I can't recall? If you do then check your cables and/or soldering.
     
  17. Dave Wallace

    Dave Wallace New Member

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    Thanks to all for your help.

    It was the travel of the sticks on the controller.

    I adjusted them and compass cal was done. I should have been Compass cal with HI RATE switched on. My mistake.OOPS!

    Thanks again for the assistance,

    Dave.
     
  18. Gary McCready

    Gary McCready Active Member

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    Glad you got it sorted. Sometimes I think I've made every mistake in the book, and then.....
     
  19. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Aha. Thought that might be the case. I tried a lot of Expo once and could even get a motor start!

    Anyway, you're off to the races....good to know you found it.

    Andy.
     
  20. Cam Batten

    Cam Batten Member

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    Hey guys,

    I have a similar problem with my compass. Brand new FC, Navi, external compass, and gps, BL is herkules III.

    I can't initialise the calibration sequence. I am mode 2, left stick up and to the left, right stick back, and all I get is the triple beeps of the gyro calibration. I've checked in MKTools and both throttle and nick have travel 0-254.

    Firmware - 2.06i
    Compass cable appears to be good. Compass on page [23] in Navi within MKTools is showing values for external compass, x y z and orientation 1 (1).

    I'm out of ideas as to where the problem might lie, can anyone offer advice?

    I have also tried enabling the 'ignore compass error on startup' and I'm not able to start the motors after calibrating the Gyro. (Accel are calibrated). The herk is working I believe, as I can 'test' motors within MKTools, but cannot get the FC to startup using the sticks

    Cheers,

    Cam
     

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