dx7 , setup question, what does the fail safe record??

[oldschool269]

Gday , ive bit the bullet and got me a dx7

done some searching here havent so far found an answer and ive got a question ..


when you set it up you bind it to the reciever , and you put the throttle stick down to set the failsafe ...

OK , so your then flying around in idle up , and the reciever goes into failsafe , and what happens then ???

in idle up the fail safe setting would apply full negative pitch , which would/could then either plow the heli into the ground

or make it head for the sky if inverted ??

has ANYONE had this happen when flying , im justa little conserned what would happen if it looses signal in idle up ???

i hope i dont loose signal , but have to ask the qusetion .

i havent finished setting it up properly , is there a failsafe setting like PCM?

or just the throttle stick down at initial setup ????

so i suppose what im asking is when you bind the reciever to the radio , does it remember flight mode 1 with stick down , or just apply stick down ?

Also , how do i (can I) change the volume of the radios 'Beeping ' while using the buttons its quite piercing
i program my radio late at night and it wakes the kids up !!

Many Thanks
Jason

[DavidH]

The failsafe is only set on the throttle channel. You only use the stick at full bottom to set the throttle failsafe. It does not have any thing to do with any of the other channels. I believe the other channels just hold the last command they received clearly till they get a new clear command.

David

[capebob]

The below quote is from the DX7 manual and is very ambiguous. The note at the bottom of the quote indicates that fail-safe positions are stored via stick and switch positions at time of binding. To me that means that all functions would have a fail safe position set.

SmartSafe:
• Prevents unintentional electric motor response on start-up.
• Eliminates the possibility of overdriving servos on start-up.
• Establishes low-throttle failsafe if the RF signal is lost.
• Maintains last-commanded control surface position in the event of RF link interruption.
Note: Fail-safe positions are stored via the stick and switch positions on the transmitter during
binding.

But the previous sentence says that the "last-commanded" positions would be maintained.

Reading further in the manual it is evident that the writers of the manual believed that all functions do have fail-safe.

3. Establish the desired fail-safe stick positions: normally low throttle and flight controls neutral.

Well, knowing that David is almost always right, I had to try it. I turned on a bound system and put the cyclic stick in a corner and turned the transmitter off. As David said, the throttle did go to idle, but the cyclic servos stayed where they were last commanded.

Bob

[DavidH]

Well, knowing that David is almost always right, I had to try it.

Thanks Bob. But I was just relaying what I had read from others posts and what I had been told by people that have the radio. They had told me that was the way the DX7 operating as to Failsafe and Hold.

David

[Danal Estes]

The manual is wrong. The statements above are right, and here is a more complete picture :)

For the AR7000, AR6100, and AR6000 receivers there are three possible states:

1) Initial power up, output is:

CH1=No Pulse
CH2-N=Position memorized at bind.

2) Once the receiver "finds" the transmitter, all channels output transmitter commands (i.e. pilot control).

3) During loss of signal (aka Fail Safe), output is:

CH1=Position memorized at bind
CH2-N=Hold Last Good

Note there is a receiver that seems to be almost unknown to flyers called the "BR6000". It has "memorized at bind" on ALL channels during condition (3) above and is otherwise identical to the AR6000. It is sold for robotics.