I have a JR9 channel and R921 receiver. I know with helicopters you can set the throttle speed you want in case of loss of radio contact so it doesn't fly away. Can this be done with the arducopter also so that it's set to a speed that would not lift it but would give it a chance to fall at a little slower speed than v = √(2gy) ? :)

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  • Doesn't JR Tx's have a failsafe position that you can set if comm is lost? I thought you set it up during binding (Spektrum does this)... unless the APM overrides somehow?

    http://www.jrradios.com/ProdInfo/Files/JRPR921-Instructions.pdf

     

  • Now with 2.0 out I'm looking again at fail-safes options. Especially considering I had a problem with what I think was loss of radio contact yesterday. The way I'm trying to set it up is to use the Preset Fail-Safe option on my AR6110e but it's not working the way it should.

     

    I'm sure I'm doing the preset fail-safe correctly. I put in the bind plug to the battery terminals on the 6110 and power the receiver with a battery on the throttle or other channel. Tx is off. Fast flashing on the Rx and then I take out the bind plug. My radio is set to center on right stick, throttle zero, flight mode set to RTL and other switches the way I want them. I then turn on Tx with back button held and it correctly binds. I think power both off, re-power receiver plugged in normally to APM and turn on Tx.

     

    Everything works normal up to this point. I then bring up MP and bring up the mode setup screen to observer what mode it's in. 

     

    To test fail safe, I turn off Tx and see on the mode setup page of MP a 1500 value which is not where I had the switch set to when setting up the failsafe. Actually I'm using 2 switches on my radio to get 6 flight modes and none of them are at 1500. What I've done in the mean time is move my RTL to the 1500 range but I would like it to work correctly.

     

    I'm just not sure if it's a problem with setting preset fail-safe or if the APM is creating the 1500 value when radio connection is lost.

     

    I like the idea of 1500 being the RTL mode since that would also help if for some reason the Rx lost power or just completely malfunctioned. The APM is still alive and can at least bring the copter back home even though if the receiver was really dead you would have to wait for it to lose battery power and maybe have less of a crash.

     

    Any ideas why it's going to 1500 instead of the switch value I set when I do the binding?

  • Hmm I will wait. I've already had plenty of experience landing tooooo fast (O_o) Is there an ETA for the next release? Main page says January. Could be?
  • Developer

    ACM is flyable. I wouldn't fly it without testing out all of the controls and settings on your copter. The trunk could break at any time, although I am trying to keep it in a flyable state constantly now that I know there are alpha testers using it. Instructions are in the code. I'm not looking for beta comments yet.

    In other words, don't fly it if you cherish your Arducopter ;)

  • I was checking out the ArduCopterNG trunk and noticed it had changes as late as yesterday. To incorporate these changes do I just need to wait for it to be zipped up here or can I download the files manually and replace it in my sketch directory?
  • This? http://code.google.com/p/arducopter/source/browse/trunk/ArduCopterM...

     

    I can replace the NG code with this or is it still pretty experimental. I will have magnetometer installed in a week and would like to have this come home feature in case of loss of signal but if it's going to reach beta soon then I will wait and stay with the NG code for now.

  • The ArduCopterNG code in Arduino0021?
  • Is there a WIKI on how to set this up?
  • Developer
    ACM already has this functionality. Actually, it can RTL if you loose radio contact. You set it up so your throttle is the indicator, just like on APM. Your throttle should drop to at least 50PWM below the normal low value. ACM can take over (optionally) and enter RTL mode. If you aren't flying GPS, we could make a special hover/level mode.

    I don't expect people to encounter this with normal flight, but I flew FPV with it the other day and I was almost a half mile away before I realized it.

    Jason
  • I didn't see a way with CLI to set the speed by observing the props spinning since it doesn't allow the motors to spin up but I put it to about 1200rpm and when I arm the motors now they do spin at a good speed. What is strange is after I fly a bit, land and disarm or when I just land and put the throttle to zero, they spin much slower and sometimes only 1 or 2 spin. What could be the cause of the change after a flight? If I reboot it, then it goes back to that 1200rpm setting. I'm thinking to set the rpm higher so it acts as a sort of fail safe in case of loss of radio contact, assuming it falls back to that idle speed on loss of contact. Need to test that by holding it and turning off transmitter.
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