SpartanRC DS760 Gyro Review and Setup Vids

[th3tick]

I guess what I meant was I used to fly in HH (AVCS) mode in any setting (normal, IDLE1, IDLE2) with other gyros. In the Finless video I saw he been switch from rate (normal) to HH (AVCS) mode via the switch typically assigned to N, IDLE1, IDLE2 (flight mode switch). I just thought maybe others maybe flying Normal in Rate Mode but in IDLE1 in HH mode. I could be wrong, that's why I ask. I could always just assign the Gyro gain to a separate switch???


That's exactly what I have - gyro gain on one of the D/R switches. All flight modes are in HH, and I never want out except for programming.

John

[puma1824]

That's exactly what I have - gyro gain on one of the D/R switches. All flight modes are in HH, and I never want out except for programming.

John

Thanks! That's what I ended up doing (assigning to a separate unused switch).

[MarkWebber]

Good, that's much better. I didn't watch Bob's video all the way through so I must have missed that part.
I got to do the setup from the start on the prototype.:)

[Finless]

My video shows using the DX Gyro menu tied to Fmod. If you watch Jermo's DX7 video he shows how to do it using the gear switch on gear. Different strokes... Since going to the X9303 I have since used gear on the gear switch.

Bob

[neohp]

hi folks,

Is there a place were i can find a servo compatibility list bigger than the one in the manual.

I ve a 9451 and i don t know wich setting to get since there is no info on the futaba website :(

jerome

[Angelos]

hi folks,

Is there a place were i can find a servo compatibility list bigger than the one in the manual.

I ve a 9451 and i don t know wich setting to get since there is no info on the futaba website :(

jerome

All Futaba digital servos we tested will happily work at 333Hz. There is no reason for the S9451 to be an exception but its rated speed is a little slow to bring out the best performance from the ds760. It will certainly work but don't be disappointed if you can't get the 3D performance others are experiencing.


You will find some info here. The relevant FAQ topics should automatically open http://www.spartan-rc.com/support.php?faq=0,7,11

-Angelos

[th3tick]

My video shows using the DX Gyro menu tied to Fmod. If you watch Jermo's DX7 video he shows how to do it using the gear switch on gear. Different strokes... Since going to the X9303 I have since used gear on the gear switch.

Bob

I think it would be a bit more problematic with the ds760 since there's a need to toggle from HH to rate and back to enter setup. Going from Normal to Idle1 if you decided to try and change a setup bit could be a tad catastrophic ;)

John

[Angelos]

I think it would be a bit more problematic with the ds760 since there's a need to toggle from HH to rate and back to enter setup. Going from Normal to Idle1 if you decided to try and change a setup bit could be a tad catastrophic ;)

John

You can only enter setup mode in the first 3-4 seconds. After that the switch works for selecting AVCS/Norm.

-Angelos

[JC]

I installed a DS760 on my T-rex 600E. I initially set it up with the radio and then checked out the Configuration Editor software and played with it a bit. After a short test flight in my backyard I had a slight bounce back after a CW piro so I thought I'd play with the settings a bit and see how they would change things.

The helicopter was sitting here on my desk just to the right of my screen with the gyro plugged in to my PC with the Flash Link & my radio on. I was reading the Acceleration profile help window. I was hands off any button, mouse, etc., (I was leaning back in my chair), and the LED on the gyro started blinking. :thinking

I leaned forward and moved my rudder stick to see if that would make a difference but no change. I turned off power to the Rx and powered back on and it was solid on again.

Did this thing go into set-up mode by itself, or is it normal for the LED to start blinking after being plugged in with the Flash Link for a few minutes? :dontknow It may have been 4-5 minutes but no longer.

I didn't do anything else with it this evening.

[Angelos]

Double blink in normal operation beans that the gyro is seeing a yaw command (rudder has been moved). Depending on how well the stick if you radio is centring you may need to increase the stick dead band of the gyro a little to avoid it. I have seen this with an old and well used 6ch TX that I use for development and occasionally I have to knock the stick a few times until it finds the same centre. The gyro learns a new stick neutral each time it is powered on, thus it will compensate for the slightly different centre when you power cycle it.

-Angelos

[JC]

Thanks for the reply Angelos.
It was in fact a double blink. I have a DX7 (and not a high use one either :() so hopefully it's what you describe.
Sounds like it was nothing to worry about so if I notice it again I'll (as you say) knock the stick a bit to see if it can find center. If that won't get it I'll increase the deadband # by 1 at a time.
:cheers

Plugging your heli into a laptop at the field is just cool. Rx's, governors, FADEC's, & speed controllers will be next. :thumbup:

[Angelos]

Plugging your heli into a laptop at the field is just cool. Rx's, governors, FADEC's, & speed controllers will be next. :thumbup:

If you USB with laptop was cool... just imagine Bluetooth with Pocket PC PDA! Oh yeah, our gov certainly will ;)

-Angelos

[miskin]

Ok guys just installed a Spartan on my 600E because i was having major tail wagging problems in a hover with the 401/9254 combo no matter what gain i was running .

I have done all the thrusted tail mods and it was still there. i purchased a set of G-Force T-Rex Weighted Tail Grips and it still wagged with the 401/9254

I installed the spartan and started with a true gain of 30 % bad it wagged really bad just on spool up .So i lowered the gain to 26% and its not wagging in a hover. I asume 26% is not to low I havent had chance to fly it only hoverd it it the back yard

So does 26% sound about right or should i look for something else that might be causing the wag.

Miskin

[Skiddz]

I did a similar thing on my 500. Started with gain in the low-mid 30s like I always do and it was too much.. Got it solid in a hover at around 29, but it'd wag turning back upwind or coming down the back side of a loop.. I'm now down to 25 and it's very solid through everything I'm capable of throwing at it.

[JC]

So does 26% sound about right or should i look for something else that might be causing the wag.

MiskinMechanical gain too high?
From what I've gathered reading the manual is that if your much below 35% you should reduce mechanical gain by moving the ball in on the servo arm, use different size blades (smaller?) etc.

Reading page 9-10 on Setting the gyro gain and mode offers a lot of good info.

Quote from page 10 in manual:
"Any gain value performs well as long as it's the optimal gain value. However, a gain value below 35% indicates that the mechanical gain of the tail is too high and it is therefore recommended moving the servo arm ball link further in."

[miskin]

Mechanical gain too high?
From what I've gathered reading the manual is that if your much below 35% you should reduce mechanical gain by moving the ball in on the servo arm, use different size blades (smaller?) etc.

Reading page 9-10 on Setting the gyro gain and mode offers a lot of good info.

Quote from page 10 in manual:
"Any gain value performs well as long as it's the optimal gain value. However, a gain value below 35% indicates that the mechanical gain of the tail is too high and it is therefore recommended moving the servo arm ball link further in."

Im using raddix 92mm tail blades and the ball on the servo horn is on the 3rd hole out. This gives me endpoint in the gyro of 87/95 . I was told to aim for endpoints of around 90 which is what i did.

Other than bringing in the ball on the servo which will up my endpoints to maybe above 100 and going to some 85mm tail blades what else could i do?

Miskin

[HFG]

Well i've had a chance to finally install and log some packs on this gyro after owning it for months (dang helis just refuse to be released ). Great gyro so far but i've yet to really throw this new heli around so ...... BTW anyone else find they need to be flash Gordan to be able to plug in the lipo and toggle the gain switch in time ?

[giskard]

Oh yeah, our gov certainly will ;)
-Angelos

oooh... I was just saying to a flying buddy (also a 760 fan) the other day it'd be awesome if you did a governor. Hopefully not too long to wait. If you need some testers we'll be at the masters ;)

[JC]

Im using raddix 92mm tail blades and the ball on the servo horn is on the 3rd hole out. This gives me endpoint in the gyro of 87/95 . I was told to aim for endpoints of around 90 which is what i did.

Other than bringing in the ball on the servo which will up my endpoints to maybe above 100 and going to some 85mm tail blades what else could i do?

MiskinI think the manual says 85 to 115 is fine. How many mm out from center are you? It's recommended to be 13-17, but on my 600, I'm at 11mm from center.
I didn't set for 8* pitch at center so my travel settings are 102 / 93.
I'm at 35% and no wag at all.

[th3tick]

BTW anyone else find they need to be flash Gordan to be able to plug in the lipo and toggle the gain switch in time ?

Definitely! I've got about a 50% success rate doing it myself, although if I'm particularly slow, I've resorted to having someone else do the toggling for me while I plug it in.

John

[Angelos]

You can hold the rudder stick off centre while you power on. This will stop the gyro from initialising. When you are ready:

* toggle the gain switch fast a few times and it will take you in servo selection mode
* return the rudder to neutral and immediately toggle the gain switch and it will take you to the reversing and endpoint setup.

giskard,
I won't have anything ready before the masters. However, I will be at the 3DM on Sunday and perhaps Saturday too. If you see me come and say hi. Wearing black polo shirt / t-shirt or jacket with large Spartan RC logo on the back.

Oh, I am also considering going to IRCHA. I am sure our friends on the other side of the pond also have lots of questions to ask. ;)

-Angelos

[HFG]

Dangggg didnt think of that.

[puma1824]

Mechanical gain too high?
From what I've gathered reading the manual is that if your much below 35% you should reduce mechanical gain by moving the ball in on the servo arm, use different size blades (smaller?) etc.

Reading page 9-10 on Setting the gyro gain and mode offers a lot of good info.

Quote from page 10 in manual:
"Any gain value performs well as long as it's the optimal gain value. However, a gain value below 35% indicates that the mechanical gain of the tail is too high and it is therefore recommended moving the servo arm ball link further in."

What if I can't get any closer to center?

[JC]

What if I can't get any closer to center?If you mean because there are no holes closer to center... drill your own.

[miskin]

I think the manual says 85 to 115 is fine. How many mm out from center are you? It's recommended to be 13-17, but on my 600, I'm at 11mm from center.
I didn't set for 8* pitch at center so my travel settings are 102 / 93.
I'm at 35% and no wag at all.

Well today i moved the ball in another hole So now its 8mm Also had to change the gyro endpoints they are 125/120 now . Ive also upped the gain to 30% and it never wagged in a hover but its So Windy here at the moment and trying to hover it in my back yard which is 15ft wide isnt much fun.

Also changed the main bearing block to the Align metal ones + a new main shaft just for fun.

Miskin