MobiFlight Community Support

Hi every body,

actually, I'm trying to drive a stepper mortor with mobiflight to build a HDG gauge for cessna.

As I feared,... when my value arrive at 359, after the value is 0, but my stepper return to 0 position in the opposite direction. It's logic, but do you know if it's possible to change this so that my stepper, arrived at 359, that continues from 1° to go back 0 or am I obliged to use a 0 sensor?

Thank you for your help;

Aurelien

Hi Aurelien,

look to this thread: https://www.mobiflight.com/forum/message/9693.html

You can also try the compare tab in Mobiflight. There you have to fill in if($<0,$+360,$) - No spaces!
If (value is smaller than zero, then $+360, otherwise value)

Hi Guys. I think this is just a logical issue.... Solution is "Compass Mode"

Go to the DISPLAY Tab of your Stepper Config.... And activate the Checkbox "COMPASS MODE" .
Now Mobiflight see the 359-->000 and also the 000---> 359 Swap and calculate a value for the stepper !

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Just to explane the facts if you like to know...

The Compare from Stephan sounds nice for other situations.... But here its not work !
A Heading can have a value from 0 to 359 .

So Stephans Condition would be always "ELSE" ... if($<0,$+360,$)
In case value can be technical only 0-359 then the situation $<0 (Value less then zero) can NEVER occure... So the ELSE "$" is executed always !

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Also your ideas are correct. A Stepper have a point for every value (endless) . If its at 359 Position then the next position upwards would be 360 !. As explaned above the System now give a value "0" instead of 360 when (we turn steerboard) ... For the Stepper the "0" Point is now a full circle to the other direction ... NOT 1 step upwards.
It can never turn more then this one circle cause value can not be less then zero or higher then 359.

What you need here is a logic that say "IF Swappoint (359-0 or 0-359 ) is reached then +359 OR -359 whatever side you come.
Thats not possible by a IF Function in Mobiflight !

BUT ... Sebastian did this INTERNAL and we can activate the "Compass Mode"... This tool will do exactly what we talk about above.

Thank you so much guys!

It works perfectly with the compass mode!

Very nice!

Hi Aurelien
Can you tell me what offset or user preset you used
i am just building my on now and have used User preset "Pos/Attitude-Heading" but it does not seem to work correctly
Ian