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PostPosted: Thu 04. Jul 2019 15:11:51 
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Joined: Thu 12. Jul 2018 17:51:47
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I would like to disable deadband entirely. I started using curves which are complicated and different for cyclic and rudder, and include deadband, so I would prefer to control it over my radio (OpenTX with lot of customizations). However in the software I can't go below 4. Is there any reason for it? Could it be made to allow values down to 0?

Also, I have a feeling that deadband is greater for rudder, than for cyclics - is this correct?


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PostPosted: Tue 09. Jul 2019 11:04:04 
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Joined: Thu 12. Jul 2018 17:51:47
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So is there any way to get rid of the deadband?


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PostPosted: Sun 14. Jul 2019 8:33:37 
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Joined: Mon 29. Apr 2013 16:06:44
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No, disabling stick deadband would result in unwanted behavior.
Anyway you should not use any mixes for stick input. This is useable for flybared helicopters but never for flybarless units. It will always cause a troubles and imprecision.
Instead it is better to ask why you need it since nothing like this should be needed normally.

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PostPosted: Sun 14. Jul 2019 10:51:38 
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No no, there is no mixing involved, just a custom curve. This is what I use for AIL and ELE now:

Image

It's a result of a lot of testing and works good for me. And as you see, it has a kind of "deadband" included in it. It's not exactly deadband, but it is very insensitive around center.

But having deadband included in Spirit, I think I won't be able to get consistent results in Sim and in real heli. I will test it more (we didn't have flying weather recently and I developed this in the SIM), but I imagine deadband will ruin this setup..

So deadband is OK in general, I just want to control that in the radio. Is Spirit requiring this for some reason? Could it be removed, or allowed to go lower than 4?

Also, it seems to me that controlling this separately for cyclic and rudder really makes sense.


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PostPosted: Wed 17. Jul 2019 17:37:53 
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I am afraid it can't be turned off and it will not change also in the future.
This is common basically for all modern FBL units. Value of 4 is so low you should be unable to notice it even as Pro pilot.
Yet we recommend to use a higher values generally as this is reaching precision limitation of the stick input readout in todays radios.

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PostPosted: Sun 21. Jul 2019 2:43:48 
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Joined: Thu 24. Dec 2015 20:13:20
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It seems that you are confusing dead band with expo because what you have achieved through your custom curves there is basically a type of expo to make the center inputs less sensitive without affecting the rest of the curve as much as regular expo would if you used it to flatten center that much.

The purpose of deadband is not to make inputs around center less sensitive but to eliminate false inputs from your radio. If you go to the diagnostic screen and move your gimbals you can see that the numbers turn bold at the point at which the spirit actually moves your servos in response to your stick input. When you increase or decrease deadband in the software you can see that the numbers turn black at a different %. If you eliminated deadband all together it could start detecting inputs without you even touching the sticks and moving the model.

I personally like to have precision and keep the deadband as low as possible but to where I'm not getting phantom inputs.


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