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Sounds like a good plan. I have a vague recollection that way back, PWM got some industry standardization at 1000-2000µs. With a Guardian this would require setting the custom limits to those values.
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I first noticed it in a DJI application after having ALT HOLD / POS HOLD. There is a complete section on it in the setup application. Then I noticed a short blurb about it in almost all the setup info I use.
Now it is a main concern in ALL my setups. Mark |
Latest blog entry: My First Real KFm Project The KF 3D...
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How can I get my expo to match up in 3DHH mode as it is when I'm in 2DHH or off mode ? When I go into 3DHH the input is super sluggish at center stick.
I also tried it with it set in 3D stabilition without HH and got the same results. |
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Last edited by kid at 55; Apr 07, 2018 at 03:12 PM.
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In flight, try doing a roll at full aileron and max rates. Compare the roll rate with the Guardian off vs. 3DHH. If you find your plane rolls faster with the G off, adjust the direct-rate-roll parameter upwards until you don't notice any difference. This setting need not be precise but don't just crank it to max or it can make the plane overly sensitive. A setting of 1.5 or 2 usually does the trick for my aerobatic planes. If you're flying a rocket ship with short wings that rolls like a drill bit and you want to keep that rate with 3D, you might need a higher setting. Once this is done, you should see about the same dual rate and expo effect in-flight with 3D on or off. On the ground, an on/off comparison won't be equal, the effects can only be evaluated in flight. |
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I had it in a plane, but I pulled it out a couple of months ago because of the problem I was having with my expo setting when I had it in 3DHH mode. I was flying with the Guardian off 99.9% of the time because of the problem. There was no problem when I was flying in 2D or stabilizer off mode, but when I would go into 3DHH mode, it made center sticks so soft on ailerons and elevator that it felt like it has triple the expo setting. What I’m trying to figure out is there a way to program or adjust expo in the Guardian program on a computer with the data recorder ? The only way I can think of to get around the problem , is to have a special dual rate and expo setup just for when I’m in 3DHH mode. |
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You will have to walk us through your settings.
On the 2D page, what do you have for HH Gain, ATC gain, Stab Roll and Pitch Angle, and Center Stick Stab? On the 3D page, what are the settings for Direct Rate 3D control, and if Enable is selected, what do you have for the Pitch, Roll, and Yaw speeds, and what is Derivative Gain set to? Be aware that 2D and 3D work in very different ways. 2D uses your commands as a percentage the Stab Angle, while 3D, when DR is selected, uses the command as a percentage of the roll rate, and Derivative Gain can affect command responses. Knowing your settings may help sort this out. |
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As Wintr said, we need more information. What kind of plane is this? I have to ask this, are you certain you have the modes right? People often complain about not getting adequate control in 2D, expo would make this worse. Where are your tx travel and rate settings? |
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Here two photos of my stick positions when my servo start to respond. First photo with the Guardian off. Second photo in 3DHH mode. Both are with the same expo setting. |
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Last edited by kid at 55; Apr 08, 2018 at 04:08 PM.
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Looks like the standard initial settings. OK, that plane is highly aerobatic, and can probably rotate at much higher rates, at least in roll, than your 3D Direct Rate is set. That, alone, will make it less responsive in 3D, as compared to 2D. This is because of the angle vs. rate function. If you turn the G off, and have someone time ten rotations at maximum aileron deflection, you will get a better idea of where to set the rate control; or, just increase the numbers until you can't tell much difference between off and on mode. You will probably need to use the try it and see method for the other controls, as most models don't reveal max rotations that easily in yaw or pitch.
As far as initial movement goes, the G has to decide when the sticks are at neutral, so HH can lock and, because of this, there is a small dead band around neutral. The greater the expo, the wider this dead band will appear, as it will take more stick movement to increase the command beyond the HH region. |
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Last edited by Prof100; Apr 08, 2018 at 07:20 PM.
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I found four "Extreme Flight Laser" versions at 48", 60", 74", 91", quite a range. It may not matter but which one is it?
So you have expo on rudder only, and that's where you are seeing the problem? Quote:
I'm a bit puzzled at how this is affecting the behavior in flight. It would only be apparent with very small rudder movements away from center. |
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Thanks Wintr and choochoo22 for the help with the Guardian. |
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My recollection was the other way around, they had decreased the tolerance zone, but I never noticed any difference in any case.
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