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HelicopterFlybarless Rotor Head SystemsSkookum › help with a 720
01-13-2011 07:46 PM  7 years agoPost 1
coptercptn

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Mesa AZ. USA

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hey guys,
I got a couple of 720 skookums and am in the process of setting one up in my 500 hughs 5 blader and have run into a miriad of problems...maybe someone familiar with these can "Light my way" here?

First off, I did download the latest firmware into the unit and hooked up the power up as per the instructions.. (although no where can I find which channels you plug which servos into the power bar, except the throttle and tail)?
A little info on equipment here..
JR 9303H using a trex 600 eccpm futaba 9451 servos on swash and 9256 on tail.
Then I started the set-up...
So,Here's what I run into;
set-up goes well until I get to the stick centering and adjust limits...the centering is good (I think) but when I go to the next screen which requires you to lower right both sticks It won't register it (I have set all trims and travels to "0" and 100% respectively.) It says in the warning screen to reset travels until you get between 65%-125%..but you can't do that because with the sticks below center on the collective side you are always going to get Minus (-) readings???

oh and as a bonus..while I'm doing this a servo goes up in smoke!!

any help here what did I miss?

thanks guys...

Jim

Home of the "Sea Cobra".....

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01-13-2011 08:29 PM  7 years agoPost 2
panzlflyer

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Goldsboro,NC,USA

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Only if its in idle up......normal linear pitch curve 0-100 on left stick to setup.
Set curves/expo etc after you have setup.
DON'T setup your radio with the servos attached UNTIL the radio is calibrated.
No mixes, no swash mixing, tail mixing, revo mixes in the radio!
1 servo swash is set in the radio.
Remember all the mixing is done inside the 720 so the radio has very little to do.

T700,450Pro,Spirit Pro,Beast+, Qav 500,Futaba18SZ

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01-13-2011 08:42 PM  7 years agoPost 3
coptercptn

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Mesa AZ. USA

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ok ...No I hve nothing set in the radio...as vanilla as it can get..

But with the servo (atv)travels at 100% (Up/down) how do you get positive numbers pulling the stick down and to the right? as you are required to do in the next step after establishing the stick centers from the tx?
I'm dealing with the pitch servo,I assume, as it is the only one that changes that setting

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01-13-2011 09:45 PM  7 years agoPost 4
jsenicka

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Eagle River, WI

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don't recall seeing that step in the wizard. The positive values I recall are for back elevator and right aileron. Those have to show positive values and show green on the setup screen.
Same with positive collective and right rudder.
At no point would full negative collective (collective stick) give you a positive/green value.
I think you have a channel reverse problem, or a procedural issue

Jim Senicka
Team Manager, GrandRC Flight Team

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01-14-2011 12:07 AM  7 years agoPost 5
coptercptn

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Mesa AZ. USA

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the wizard shows pulling both sticks back and to the right?.. I know..it makes no sense to me either???

step 22 on the initial setup wizard

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01-14-2011 02:08 AM  7 years agoPost 6
panzlflyer

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Goldsboro,NC,USA

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Sounds like a reverse channel, reverse the one thats wrong.

T700,450Pro,Spirit Pro,Beast+, Qav 500,Futaba18SZ

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01-14-2011 02:22 AM  7 years agoPost 7
coptercptn

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Mesa AZ. USA

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I tried that but it still would accept the values...? even when I am showing a +85% now (the spec says 65-125) it still won't accept the stick parameter..

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01-14-2011 02:32 AM  7 years agoPost 8
hjscm

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Bay Area

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first make sure the servos are not connected. i think when it asks to move sticks bottom and to the right it is calibrating the tx. later on it will ask to adjust travel so it reaches 100% when the stick reaches the end of travel if it goes to 100% to early you can adjust that. later on in the wizard you will look to get green when you give positive collective and then pull back on elevator.

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01-14-2011 03:23 AM  7 years agoPost 9
coptercptn

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Mesa AZ. USA

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yep I have the power buss empty.. but it won't even accept the center stick movement now... is there a way to reset to default.. I mean I tried the tab that says "reset gyro byut that doesn't seem to work now either.. gonna quit now and wait for a phone call tomorrow.. I finally got a reply from skookum and they are going to try and walk me through it and troubleshoot it

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01-14-2011 10:06 PM  7 years agoPost 10
jsenicka

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Eagle River, WI

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My recommendation

Create a brand new model in your TX.
Leave all end points, servo directions, etc at default.
Bind to your TX.
Run through setup wizard again. Be very careful to read each step, as some is a bit confusing.

I did my SK720 with the 720 sitting by itself on the bench, using only USB power

Jim Senicka
Team Manager, GrandRC Flight Team

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01-15-2011 12:55 AM  7 years agoPost 11
alfred

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Australia, New South Wales, Mid North Coast

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Adding to the above:

It clearly states in the manual and wizard NOT to connect any servos in the initial setup phase.

So..
Disconnect "everything" from the SK720.
Hook up the mini USB cable to the SK720 and your computer "ONLY".
The SK720 will be powered from the USB during the initial setup.

Run through each wizard, where one of the most important steps at the beginning is to set your servo speed for cyclic and tail.
It's going overboard, but every time you change a setting in the GUI on your computer for the SK720, press the "send" button.

When you get to the wizard where it asks you to hook up the servos, do one step FIRST!!!

Disconnect all linkages at the servo horn ends.
Get the servos to move and just "hold" the linkage on the servo to check if the particular servo moves in the right direction and does NOT bind at extremes.
The above also includes your tail servo.

This way, you will not cause mechanical binding at your servos and burn them out.

When you have completed your setup and before disconnecting your PC from the unit....save your settings on your computer.
In that way, if you ever make changes that cause you to make the heli worse, you can just dump this configuration file into it and it get's you to a working profile again.

You can name those configuration profiles whatever you want.
The way I do it, is that when I have a working profile, that gives me just standard hovering and simple circuit flying, I use it as my "default".

So if you are flying a Align600N, you would call this profile: "600NDefault" and save it on your PC.

So now, no matter how much you screw up your setting, you are 20seconds away from having a working/flying profile again.

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01-15-2011 08:21 PM  7 years agoPost 12
coptercptn

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Mesa AZ. USA

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ok guys got it fixed... the guys at Skookum called and we walked our way though everything.. turned out everything I was doing was correct. the issue was my 9303!!! After repeated attempts to program with it, we ended up at the same failures.. Then just as a thought I drug out my DX-7... everything went as advertised... So now the quetion is (and they are going to do some testing on their end also) is wether or not it is a programming issue with the 720/9303, or I have a bad radio! I am sendin it in to have it checked out .

But, I was flying with it and don't recall any issues.

Anyway the 720 is bound and works! thanks for all the suggestions guys...

Jim

Home of the "Sea Cobra".....

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01-15-2011 11:36 PM  7 years agoPost 13
panzlflyer

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Goldsboro,NC,USA

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2 thoughts before you send it in........
Did you bind it in 2048 or 1024?
Are your satellites newer or are they old ones from an Ar7000.
Reason i ask is the DX7 is 1024 and the 9303 is 2048 and there has been some issues regarding resolution with other fbl units

T700,450Pro,Spirit Pro,Beast+, Qav 500,Futaba18SZ

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01-16-2011 12:28 AM  7 years agoPost 14
coptercptn

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Mesa AZ. USA

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well that's interesting because I tried and it accepted binding w/9303 @2048 and it also successfully bound the DX-7 at the same rate...but...with the 9303 the rx would not stay bound when the battery was disconnected.. with the DX-7 it all works just fine..

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01-16-2011 02:01 AM  7 years agoPost 15
doorman

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Sherwood, Arkansas

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Interesting Thread....
Sorry you had the problems, but glad to hear that you found a solution.... I would be interested in hearing what you come up with on the 1024/2048 info....
And one question is where do you "choose" which you are going to bind too.... I don't think I recall seeing a selection anywhere on my 12X???

I have heard that the 720 is a pretty straight forward set up... but have not worked with one yet... I plan on setting up my 5 blader with one too....

Thanks, Stan

AMA 2918-Team JR, Spin Blades,,Castle Creations, Unique Aircraft

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01-16-2011 02:47 AM  7 years agoPost 16
alfred

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Australia, New South Wales, Mid North Coast

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And one question is where do you "choose" which you are going to bind too.... I don't think I recall seeing a selection anywhere on my 12X???
It's the RX that determines it.
So if you select 1024 in the SK720 and then bind, the TX is forced to use that resolution automatic.

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01-16-2011 03:08 AM  7 years agoPost 17
jsenicka

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Eagle River, WI

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running x9303 (native 2.4) and 2048 with my SK720's.
Working fine

Jim Senicka
Team Manager, GrandRC Flight Team

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01-16-2011 03:38 AM  7 years agoPost 18
doorman

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Sherwood, Arkansas

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Now I Have It....
It is in the 720.... didn't think I had seen that in any of the tx's... thanks for clearing that up for me....

AMA 2918-Team JR, Spin Blades,,Castle Creations, Unique Aircraft

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01-16-2011 10:57 PM  7 years agoPost 19
panzlflyer

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Goldsboro,NC,USA

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There has been about 4 versions of satelites since they came out, some older ones will not bind correctly with 2048, there are no markings on them to tell you which ones they are but usually the ones without quick connect are 1024 only

The DX8 ones also have some internal differences according to Mr Mels testing on the Vbar

T700,450Pro,Spirit Pro,Beast+, Qav 500,Futaba18SZ

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01-17-2011 04:20 AM  7 years agoPost 20
coptercptn

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Mesa AZ. USA

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the sats I am using have the numbers 7224 on a tab inside the case. they are working fine at 2048 with the DX-7 tx. all other issues have been resolved!! Now I just have to get all the blades balanced/tracked and ready to fly... and of course finish with the wizards and get the swash setup etc..

Home of the "Sea Cobra".....

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HelicopterFlybarless Rotor Head SystemsSkookum › help with a 720
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