SpartanRC DS760 Gyro Review and Setup Vids

[highland flyer]

It still sounds like something is not set correctly still..

Bob has a setup vid at the beginning of this thread that may be worth looking at.

http://video.helifreak.com/?subpath=...s760_setup.wmv

[sonofcar]

i seen that, an set it according. but no go

[UK_Sonics]

Inspect the gain channel connection, might not be seated in receiver correctly, failing that why not contact Spartan support, they are normally very quick at responding.

[th3tick]

It sounds like you've got the gain channel not connected properly, and it's going at 0 gain. Can you detail your radio setup, receiver, and channel?

John

[sonofcar]

jr 9303 gains at 70 gyro led is solid meaning its in holding hold have checked and rechecked set up acording to manual. and again it workes fine on the bench last night and for a couple seconds on first flight. then bam now it's doesnt work no matter what i do. whats the best way to contact spartan.

[mporlier]

Originally Posted by sonofcar

so install the ds760, set it up and it works perfect on the bench. Go to test fly it and works as it should for about 5 seconds and then boom, tail starts spinning around out of control. land it check it on the bench and the gyro is not correcting the servo like it should. Its in hold mode 70 percent gain, servo moves with stick and will stay as it should waiting for stick or heli movement. The pronlem is the gyro will not correct. on the bench i move the heli around and it (rudd sevro) stays and does not move. I read the manual again and reset gyro two times, everything is correct. but it still does it. any ideas would be great i really want this thing to work as it should.

the exact same thing just happened to me! I recently installed my new AR7000 rx. I have an X9303. I put the gain at 72. First take off I got severe wag and ended up breaking the landing gear.

After the replacing the part I tried again. Before takeoff I confirmed proper gyro response. I lifted to a 1ft over, held it for 2sec, then I tried to turn. The tail started to wag for about 2 sec and it just gave. The heli piroed fast and I crashed.

I did fly this heli before with that gyro and a Futaba Tx/Rx. One day, during a flight, the tail suddenly started to wag heavily for no apparent reason. It is during the rebuild that I changed the TX/RX so I can not say if my new X9303 values are not at fault. I know my gain lead is ok since I was able to program my gyro.

But the fact that you experienced the same thing tells me there must be something else...

[UK_Sonics]

Goto the Spartan RC website, and click support.

[mporlier]

I just wrote to the support page quoting both incidents.

[mporlier]

Quick question Sonofcar, did your gyro enter setup mode for no apparent reason prior to flying cuse mine did.

[th3tick]

Strangely enough, I've had the one on my T-Rex 600 go into setup a couple times now too, both at the field.

In fact, I just today re-did the setup of mine because I could hear buzz the last time I was out flying, and sure enough, both endpoints were off today.

My other one hasn't done this, but doesn't have a lot of flights on it yet...

No piros-out-of-control here, however, just lost endpoints.

John

[mporlier]

Originally Posted by th3tick

Strangely enough, I've had the one on my T-Rex 600 go into setup a couple times now too, both at the field.

In fact, I just today re-did the setup of mine because I could hear buzz the last time I was out flying, and sure enough, both endpoints were off today.

My other one hasn't done this, but doesn't have a lot of flights on it yet...

No piros-out-of-control here, however, just lost endpoints.

John

Ah Ah !!!! We are on to something here.... lets investigate more!

By the way if it is proven it is a gyro malfunction will Spartan pay for the crash?

[sonofcar]

Originally Posted by mporlier

Quick question Sonofcar, did your gyro enter setup mode for no apparent reason prior to flying cuse mine did.

no it did not go in to set up mode. It just does not correct direction.

[th3tick]

I can imagine it would be pretty catastrophic if it lost sensing direction, or went to the wrong servo type. Neither of those sound like what sonofcar is experiencing, however.

I have an S9254 hooked to both, so they're both the default servo type, and the default direction is correct, so that may have saved me from catastrophe...

[Angelos]

I have never seen a ds760 entering setup mode on power on and I must have power cycled my development gyros thousands of times on both Futaba and Spektrum receivers. If this happened it is most likely the result of a glitchy switch on which the gyro may see as toggling the gain switch and enters setup mode. The time window to enter setup mode only lasts around 4 seconds (during calibration time) and it is not possible for the gyro to enter setup mode in flight. If you experienced such issue please PM me your receiver model and let me know if you are using a regulator or BEC. If some similarities arise I may be able to replicate it. Meanwhile I will produce a firmware update to "mute" the gain signal for the first half second after power on which should mask any power on glitches and should eliminate the possibility of unwillingly entering setup mode.

We have already responded to mporlier's issue in our support system. sonofcar I suggest you also do the same as I would like to go step by step and understand what exactly you see. When you contact us also please let me know if you have a Flash-Link USB cable which may came handy to run some diagnostics. In any case based on the information I see on this thread two issues you guys experienced do not appear related in any way. First indications show that mporlier may have just been running very high gain after changing radios but I will continue the talks with him and check everything in detail.

-Angelos

[th3tick]

How many toggles does it have to see to enter setup? It seems like if you made this higher - say 4-6 full toggles, a bad plug-in is less likely to be mistaken for it.

John

[mporlier]

Angelos,

A glitchy switch, I dont think so. My X9303 is brand new, I use the ruder D/R switch and I have the same value for both position. On top of this, once it starts getting in programing mode, it is hard to make it stop. It does it sometimes more than 5 times in a row.

[Angelos]

th3tick,
3 toggles between modes. "AVCS to Rate to AVCS to Rate" or "Rate to AVCS to Rate to AVCS". Yes more toggles would reduce the chances but it will get harder to do them during the calibration time window. Keep in mind that the function of the switch changes once calibration is done.

mporlier,
I was referring to the receiver and radio gear power supply, not the X9303. All mechanical switches generate glitches at the switch on moment. In case of electric models where people often plug the ESC/BEC connector to the battery these glitches would be even worst. It all happens very fast but they ds760 may have already been up and running and could see these as a command to enter setup mode. By ignoring the gain input for fraction of a second at the start I am pretty certain that this go away.

-Angelos

[mporlier]

I undersrand. I use the Align 2 in 1 first generation. The one with transparent heat shrink on the switch PC board.

[th3tick]

Originally Posted by Angelos

th3tick,
3 toggles between modes. "AVCS to Rate to AVCS to Rate" or "Rate to AVCS to Rate to AVCS". Yes more toggles would reduce the chances but it will get harder to do them during the calibration time window. Keep in mind that the function of the switch changes once calibration is done.

I understand, but I still think a couple more would be a better way around it. I'll trust you to experiment and find what works best.

One other thought I had was to put a "config lock" option into the software. That way it would take a cable and laptop to decide you want to change it once you've decided it's set, and would eliminate the possibility of accidentally going into setup.

John

[Pinecone]

The other thing, which mode did you bind the Rx in? Did you re-bind after completing the entire setup of the heli?

The Rx sends out the gain setting at binding, then when it links to the Tx it sends out what it gets from the Tx. There is a place that one transition may occur.