Can I bench test the Failsafe?

Posted by Randy Brazeau on September 13, 2012 at 10:07am

Good day,

I have completed the assembly and setup/calibaration of my first quadcopter,

Plan a test flight this weekend.

APM2.5

Failsafe action = 2.

DX8 - followed the post to calibrate the failsafe. Looks good.

On the bench, without props I noticed the motors increased in speed when I shut off the transmitter.

Now I'm worried that it will take off if I try this in the field.

I assume it is trying to climb to 10 meters before it can RTL.

Is there a method to bench test the failsafe?

Thanks

Randy

 

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Replies

  • Developer
    Randy September 13, 2012 at 9:01pm

    We were actually discussing this very issue on this week's dev call..the need for an easy way for people to check their failsafe and know what happens.  Anyway, as Jason says..checking the radio input (either through the cli or as you have through the mission planner's radio configuration screen) is a good start to know whether it will be activated..but there's no super easy way to know exactly what action will be invoked on a failsafe (i.e. RTL or not).

  • Developer
    Jason Short September 13, 2012 at 10:09am

    If the motors spin up they are probably trying to gain altitude.

    Try this: open the Serial window of Arduino and run the CLI.

    There is a test called PWM. Run that to see the raw PWM output. 

    Turn off the radio and note what it does. It should drop below 975.

    If it goes higher, well,  you have problems with your radio setup.

    Jason

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