Ron Jensen ha scritto:
> On Mon, 2009-11-23 at 19:47 +0100, Nicola Quargentan wrote:
>> Ron Jensen ha scritto:
> 
>> First thank you for your settings :)
>>
>> But what about the use of axis instead of buttons?
>> For select the frequencies, buttons are good but I'm not sure going well 
>> for radial selection: I can buy a rotary switch continuous, but how many 
>> laps I have to do to move the first radial of 180 degrees, for example? 
>> I do not know if I explained well the question.
>> I thought of using an 12 bit encoder with a resolution of 4096/360, more 
>> than enough to select one radial. Obviously I should manage it as an 
>> axis of the joystick.
>>
>> Some opinion? Thanks.
> 
> For an axis in the range [0-1] use something like this:
> 
>  <axis n="0">
>   <desc>Heading Bug</desc>
>   <binding>
>    <command>property-scale</command>
>    <property>autopilot/settings/heading-bug-deg</property>
>    <dead-band type="double">0.0</dead-band>
>    <offset type="double">0.0</offset>
>    <factor type="double">360.0</factor>
>   </binding>
>  </axis> 
> 
> For an axis in the range [-1,1] use this:
>  <axis n="0">
>   <desc>Heading Bug</desc>
>   <binding>
>    <command>property-scale</command>
>    <property>autopilot/settings/heading-bug-deg</property>
>    <dead-band type="double">0.0</dead-band>
>    <offset type="double">1.0</offset>
>    <factor type="double">180.0</factor>
>   </binding>
>  </axis> 
> 
> Even a 10 bit pot axis will give better than 1/2 degree selection.
> Jitter might be a problem.

I think that using an 12 bit axis, and dead-band parameter I can 
eliminate the jittering. Keep in mind that I will not use a true 
joystick, but instead some knobs.

Many thanks.


-- 
Nicola Quargentan

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