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Scorpion ESC Settings : help!

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  • #1

    Scorpion ESC Settings : help!

    Guys,

    Tonight I fired up my Scorpion 130A HV ESC for the first time with a Scorpion 5020 450kv motor. It's in my Raptor 90SE. The ESC settings are pretty much standard but I was quite disappointed with the soft start: it was nothing like as smooth as I'd hoped and much rougher than, say, a standard Trex 500. Should I reduce the P Gain and/or I gain to their lowest settings? Any other advice on settings?

    Also, the amber light flashes when the motor is at standstill, is this normal? And can I remove the IR sensor when the ESC is in normal use? The manual isn't all that detailed.

    Any help will be appreciated.

    Si
    Raptor 90 SE FBL e-conversion, Raptor E720, Raptor E820, Synergy E7, Goblin 700 & TREX 700N
    Tags: None
  • #2
    Si, the amber light is normal, it simply gives a visual indication that the ESC is armed. I have to agree the soft start on mine is jerky to the point of almost stuttering before the initial spool up.
    I'll be watching your thread to see if there's a cure. I've kinda learned to live with mine. The strange thing is the original 90 amp one I had was silky smooth on factory settings. I think it may have something to do with the pole timing but I'm not sure.
    Sean,

    Logo 700 Xxtreme
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    • #3
      That's a bit of a disappointment!
      Raptor 90 SE FBL e-conversion, Raptor E720, Raptor E820, Synergy E7, Goblin 700 & TREX 700N

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      • #4
        Shameless bump, can anyone help? Changing p.gain made no difference to the initial startup.
        Raptor 90 SE FBL e-conversion, Raptor E720, Raptor E820, Synergy E7, Goblin 700 & TREX 700N

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        • #5
          Not sure how to solve your problem, but I'm sure I have read that you shouldn't run with the ir connected. Something to do with effecting the signal to the ESC.

          My 130 didn't even work out the box, so not a huge fan to be honest.
          Cheers,
          Simon
          --------------------------------------------
          Trex 700N & E
          Futaba 18mz and some planks !!

          x 2

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          • #6
            I just got mine yesterday for my TDR. This is an extract from a discussion on HF re the I and P gains.....

            "If the I-gain is too high the HS will not be stable in a hover, it will
            oscillate because it's very sensitive to load changes. If it is too low, then
            there is a lag in governor response.

            The P-gain I raised point by point,
            until it felt like it was holding headspeed tight under load like climbouts,
            power loops and tic-tocs. If the gain is too high the drivetrain sounds like
            it's straining and some cases bucking. If P-gain is too low, RPMs drop under
            load and you can hear that too.

            Your goal is to get a smooth transition
            when you add pitch.

            Based on what I know about your setup, try I-gain 5
            and P-gain 7 and tweak from there one change at a time. You
            could try going to I-6 & P-8. Also give the governor a couple minutes of
            flight to adjust its control loop after you make a change."


            From that, I guess the I and P gains dont affect the spool up.
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            • #7
              Many thanks, for that info. The ESC seems to jerk-start the motor to get it spinning, from there on it's nice and smooth. I'll reset the i.gain and p.gain figures as you suggest. When I do fit the blades (they are off at the moment for on-the-bench spool-up) I'll have to make sure the bolts are nipped-up well, or I could give the head a gentle start by hand to reduce the shock to the drive train.
              Raptor 90 SE FBL e-conversion, Raptor E720, Raptor E820, Synergy E7, Goblin 700 & TREX 700N

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