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Spektrum DX8 & AR8000 failsafe for DJI NAZA (step by step)

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Spektrum DX8 & AR8000 failsafe for DJI NAZA (step by step)

Postby GarethRens » Fri Aug 17, 2012 12:07 pm

The whole failsafe thing can be a little frustrating to setup correctly on a Naza.
This isnt the naza's fault, more the transmitter & receiver.

Once you've done it the first time its actaully fairly easy to do.

Some nice to know info

1. The actual failsafe functionality resides in the receiver.
It has the ability to fall back on a specific channel setting when TX signal is lost.

2. You cannot setup a TX signal loss failsafe without having a receiver that supports failsafes.

3. The DX8 supports 3 different failsafes. For the Naza we are going to use the PRESET failsafe.

4. Because the failsafe on the Naza works on the same channel as the control mode switch.
We cannot set the failsafe to activate with a standard defined switch position.
It needs to be set on the same channel as the control mode switch but inbetween one of the modes. (GPS-ATTI-MAN)
The problem is the TX only had a 3 position switch. How do you set it inbetween? Read on :)

5. The way the preset failsafe works is as follows. If we perform a fail present bind.
Example only: We have a 2 pos switch set to OFF and LAND. We then bind the transmitter with the switch
in the LAND position. Now when you turn the transmitter off, the receiver registers that its lost TX signal
and go into failsafe mode which will be LAND. Simple :)

Now for the setup on the NAZA. As we have no 2 pos switch to use for failsafe we have to use the control mode switch.

Below is the step by step guide :)



SET FAILSAFE FOR ATTI MODE (this is just a test of the failsafe to make sure it works, we will change a few things after we happy that it actually works)

1. TURN EVERYTHING OFF ;)

2. Turn on the DX8 and make sure you have the correct model selected. And remember what switch positions define each mode. Eg. UP=GPS MID=ATTI DOWN=MAN

3. Turn off the DX8.

4. Insert the bind plug into the correct port on the receiver (make 100% sure it says BIND on the port)

5. Plug in the copter/receiver. The receiver LED will start flashing. This indicates its looking for something to bind to.

6. NOW REMOVE THE BIND PLUG BEFORE TURNING ON THE TRANSMITTER! LED will continue to flash.

6. Make sure your transmitter is OFF.

7. Set your control mode switch on your transmitter to ATTI mode [middle sw pos] (the transmitter must be off! :) This is the most important step!!!

8. Now hold down the trainer button while powering on the transmitter. Hold the button until it says its binding and displays DSMX.
Then release the trainer/bind button.

9. Once binding is complete the transmitter will reboot and go into normal flight mode. The LED on the receiver will now be solid.

10. Preset Failsafe binding is now complete.



TEST TO SEE IF FAILSAFE IS WORKING

1. Turn the transmitter on (if its off)

2. Plug in the copter and wait for it to boot (4 green led flashes)

3. Plug the copter into the PC and start the assistant.

4. Make sure the copter has successfully connected to the PC. [MC Output must be OFF]

5. Go to TX Cali tab and make sure when you flick the control mode switch, it moves from GPS to ATTI to MAN.

6. Select GPS mode (GPS block is BLUE)

7. Now switch off your transmitter.

8. If you've done everything correctly it should change from GPS to ATTI mode.

9. If it doesnt, you've done something wrong or missed something. Start from the beginning :)

10. If it does, continue with below instructions.



SET FAILSAFE FOR TX SIGNAL LOSS

1. Turn everything on and get everything connected to the PC.

2. Make sure the control mode switch is working.

3. On the transmitter, go into the fuction list (click the wheel down)

4. Go to Servo Setup.

5. Flick your control mode switch and check to see which channel its on. GER, PIT, AX2 or AX3.

6. While watching the control mode switch postition on the naza assistant,
Remember the two percentages of travel for the CMS channel (we will be changing it back to this when we are done)
Now change the travel on the control mode channel servo travel until the tab moves away from either GPS or MAN. Move it to failsafe.

7. Once failsafe lights up blue, exit the assistant, unplug the copter from the pc, turn the copter off and then the transmitter.

8. DO NOT CHANGE ANY SWITCH POSITIONS AFTER STEP 6!

9. Make sure everything is turned off.

10. Insert the bind plug into the correct port on the receiver (make 100% sure it says BIND on the port)

11. Plug in the copter/receiver. The receiver LED will start flashing. This indicates its looking for something to bind to.

12. NOW REMOVE THE BIND PLUG BEFORE TURNING ON THE TRANSMITTER! LED will continue to flash.

13. Make sure your transmitter is OFF.

14. Now hold down the trainer button while powering on the transmitter. Hold the button until it says its binding and displays DSMX.
Then release the trainer/bind button.

15. Once binding is complete the transmitter will reboot and go into normal flight mode. The LED on the receiver will now be solid.

16. Preset Failsafe binding is now complete.



FIX THE SERVO TRAVEL & TEST THE FAILSAFE


1. On the transmitter, go to Function List, then Servo setup then change the CMS (Control Mode Switch) channel travel percentages back to what they were before.

2. Plug everything into the PC and check to see if the CMS performs correctly. Must be able to select GPS, ATTI and MAN.

3. While wathcing the CMS position, turn off your transmitter. It should if you've done everything correctly. Go into failsafe.

4. If it doesnt, start with step 1 of SET FAILSAFE FOR TX SIGNAL LOSS.

5. If it does, CONGRATS :)



Hope this helps all those DX8 boys out there!

G:)

P.S. Im only human, so if there are any mistakes in the above, let me know!
http://www.stuffinc.co.za
We sell all kinds of stuff, including multi-rotor UAV/Drones :ugeek:
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Re: Spektrum DX8 & AR8000 failsafe for DJI NAZA (step by ste

Postby topview » Tue Nov 20, 2012 10:06 am

Gareth this is why i like you, you have solutions and answers.
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Re: Spektrum DX8 & AR8000 failsafe for DJI NAZA (step by ste

Postby helijib » Mon Dec 24, 2012 9:11 am

Thanks for this step by step instruction! Just awesome...
I'm still trying to wrap my mind around this a bit.
Couple of questions here...
1. I actually have my three position switch set up with Manual, ATTI & GPS and I have them working properly I think? But I set them up with the throttle at 0, low stick.
So do I need to start over and bind with the throttle above 10%? So when I do turn off the transmitter the failsafe box turns blue AND the throttle jumps to lets say 20%.
2. And should the manual position be set to failsafe?
I guess I don't really understand the ar8000 failsafe and then why you need the Naza failsafe at the same time? And when to use which one at what time??
I'm really curious when in the all these steps you mentioned do you bind with throttle above 10%?

Thanks for your help!!!!
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Re: Spektrum DX8 & AR8000 failsafe for DJI NAZA (step by ste

Postby R138 » Fri Jan 11, 2013 10:30 pm

I'd also like to say thank you for the step-by-step instructions. I've printed them out and put them with my Naza User Manual. :yes:

I'd also like to know how much throttle is needed when setting failsafe, I set it to above 10%, as instructed in the manual (at about 25%), but when I turned off the transmitter to test the return to home, the Quadcopter just fell back to the ground. :oops:

Should I have set the throttle at 0% or 50%..............? :question:
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Re: Spektrum DX8 & AR8000 failsafe for DJI NAZA (step by ste

Postby GarethRens » Fri Jan 18, 2013 7:16 am

What kind of failsafe are you trying to setup?


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http://www.stuffinc.co.za
We sell all kinds of stuff, including multi-rotor UAV/Drones :ugeek:
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Re: Spektrum DX8 & AR8000 failsafe for DJI NAZA (step by ste

Postby R138 » Sat Jan 19, 2013 11:27 pm

GarethRens wrote:What kind of failsafe are you trying to setup?


Return to home and land. I NEVER takeoff without GPS lock and setting above 10% never works, it just does a hard landing. Setting 50% throttle returns to home but won't land. :question:

Using your instructions, I can see in the NAZA assistant it going into failsafe, but how can the NAZA control the throttle when failsafe ONLY works on the U channel?
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