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MC-20 Throttle Value

Discussion in 'Electronics' started by Chris Fox, Aug 26, 2013.

  1. Chris Fox

    Chris Fox Active Member

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    Hi,

    I have come across a problem on my MC-20 transmitter, where I can not get a throttle value greater than 127, the range of the of values goes from zero to 127 at the mid point, and then no further change for the rest of the throttle lever travel.

    If anyone has seen this problem before, I would love to know which button/setting I have stuffed up.

    Any advice appreciated.

    Thanks

    Chris
     
  2. Gary Haynes

    Gary Haynes Administrator
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    On the Servo Display screen as you move the throttle you should see -100 to +100. You shouldn't see any values on any channel of 127. Maybe a quick photo of what you are looking at?
     
  3. Chris Fox

    Chris Fox Active Member

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    G'Day Gary
    Please see the pictures below of the servo display and corresponding throttle positions at either end and the mid point ....
    Thanks
    Chris
     

    Attached Files:

  4. Gary Haynes

    Gary Haynes Administrator
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    Chris, look at the Servo Adjustment screen and see if the values look like this for S1.

    Screen Shot 2013-08-26 at 3.41.23 PM.png
     
  5. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    G'day, Chris. Didja know all you images are upside down? Is that coz you're in Oz?
    Andy.
     
  6. Chris Fox

    Chris Fox Active Member

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    G'Day Gary,

    I've attached a photo of the servo adjustment and it shows 100 100 .....

    Andy, they reverse all the orientation sensors in cameras before sending to the southern hemisphere ;) the problem doesn't exist if you look at the screen in the correct orientation (the words become a bit harder to read though .....)
     

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  7. Gary Haynes

    Gary Haynes Administrator
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    Ok let me summarize. When you move the throttle stick to it's lowest position you see -100 on the Servo display screen? As you move the stick up to the center the numbers change and it get to Zero at the middle. But won't go any higher.

    Last thing I think to check is the Stick Calibration. See page 36 in the MC-20 manual.
     
  8. Chris Fox

    Chris Fox Active Member

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    That's exactly the problem ... I'll try the stick calibration.

    Thanks
     
  9. Chris Fox

    Chris Fox Active Member

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    G'Day Gary,

    Thanks for the help. The stick calibration corrected the problem.

    Thanks
    Chris
     

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