Jermo's DX7 Setup Video

[Jermo]

Ty Sir, awesum suggestion...

Just as a note: It's too windy for me to fly but I just had to do it anyway. At a setting of 62% on the Function Mode/Gyro Sens/0: setting the tail held in the wind 100%. It didn't weather vane at all. hehe...nearly lost the bird but ran two tests regardless. The tail is so solid I only had to worry about compensating for the wind..ie altitude and positiong (wind kept making me climb/dive and moving the heli back...so I had to add pitch/throttle and forward collective to get back to the yard.. :)
Jermo

[PBMAXX]

Well again this is what I have seen but actually it doesnt make sense! 1 to 1 or 2 to 1 does but this is odd.... If someone with a 601 or 611 that has a display and SHOWS the value in relation to value in the radio could help we would HAVE THE FACTS JACK....

Maybe ask someone on the forums what they see... the Trex600 forum might be a good place since most there use a 611. Or ask in the general forum. So we should really have the fact before telling someone what to do or state your not sure in the video....

Bob
With my Gyro % at 82 on my DX7 my 601 shows 48.
Paul :glasses2:

[Jermo]

PB how do you see that?, that pretty much confirms the correct setting for 0: would be 64 to 66 or so to achieve 32% gain.
Jermo

[PBMAXX]

I'm not sure what you mean? When I set the DX7 at 82 % my screen on the 601 says G48a 5.8. When I click the DX7 Gyro increase/decrease the 601 changes by 2 digits at a time. Is that what you mean :dontknow

[Finless]

Paul, first you should NEVER run a 601 or 611 at that high a gain! You will burn up your servo. 37% MAX man.....

If you could turn down your DX7 gain until the 6o1 display shows 36% and tell us what the radio says.

Bob

[PBMAXX]

I just did it as a test. Since the DX7 moves the 601 at 2 points at a time I can get 35 on the 601 at 74% on the DX7 or 37 on the 601 at 75% on the DX7 :D
Paul :glasses2:

[PBMAXX]

Here's a picture
http://img.photobucket.com/albums/v470/PBMAXX/100_0518.jpg
Paul :glasses2:

[Jermo]

I'm not sure what you mean? When I set the DX7 at 82 % my screen on the 601 says G48a 5.8. When I click the DX7 Gyro increase/decrease the 601 changes by 2 digits at a time. Is that what you mean :dontknow

that's exactly what I mean. wow..what's that display??
will you do me a favor? set 64 and 66 on the DX7 and tell me what your GY401 display shows as the gain.

I love that display.. I'll start redoing the gyro section asap.

I just looked at the display for your image and I'm confused.
at 1:2 DX7 to Gy401 a setting of 74% would be 24x2 or a gain of 48. The display shows 35. Regardless 74% is too high.
Jermo

[R1Time]

This is a great video!! I have the JR 7202 radio can I use this video for the set up?

[Jermo]

I'm not familiar with that radio but if the menu's are the same then you can. There is an error in the video. To get 32% gain in Heading Hold mode use 66% for the 0: setting and the 1: setting.
Jermo

[Finless]

OK then 1 step on the DX7 is 2 on the signal to the gyro. but if that is true then 60 on the DX7 should be 20 on the gyro.
e.g. 50 being 0 gain thus should be 50=0 so (60-50)*2=20.
70 on the DX7 should be 70-50*2=40... why doesnt that happen? Is my math wrong some how?

Let look at this another way.
50=0 gain. Every step = 2 gain right
So let look at 50 as 0 and just use 0
thus 60 in the radio is 10 right? but 2 steps should read 20.
70 in the radio = 20 right? but 2 steps should be 40...

This is not making sense to me how the JR radios or DX7 (it's a JR) allows you to know how much gain your are actually giving the gyro... It appears NOT to be linear!

Bob

[PBMAXX]

At 64% on the DX7 I get 19 on the GY601
At 66% on the DX7 I get 22 on the GY601

Might also help: To get zero on the 601 (before it starts counting backwards) the DX7 is at 52%
Paul :glasses2:

[Finless]

Hmmm THAT leads me to believe it is 1.5 steps not 2.

What does the gyro read at 70 on the DX7 please?

Paul you are using the gyro menu and AUX 2 not the end points on channel 5?

Bob

[PBMAXX]

I'm using the Gyro menu on the Gear channel on the DX7. I'm not touching the GY601. The reading at 70% on the DX7 is 29 on the GY601
Paul :glasses2:

[Finless]

Yep... forgiving a .5% then the DX7 is stepping at 1.5 on the gyro signal
70-50=20*1.5=30 (you got 29 which is close enough)

Paul... one other test please. WHAT is the end points of your GEAR channel? If 100% then it is 1.5. If more than that might effect the math.

Also do me a favor... change the gear channel to end points of 150 (max on the DX as I recall) and see if that changes how the gyro menu works.

Thanks for helping us out on this!

Bob

[Jermo]

I wonder if the 601 is the same as the 401?

[PBMAXX]

My gear channel end points are 100%
I can only change the + travel to 150% and it does not change how the Gyro menu works :dontknow
Paul :glasses2:

[Jermo]

Yep... forgiving a .5% then the DX7 is stepping at 1.5 on the gyro signal
70-50=20*1.5=30 (you got 29 which is close enough)

Paul... one other test please. WHAT is the end points of your GEAR channel? If 100% then it is 1.5. If more than that might effect the math.

Also do me a favor... change the gear channel to end points of 150 (max on the DX as I recall) and see if that changes how the gyro menu works.

Thanks for helping us out on this!

Bob

Bob,
that would mean with the 401 (yes he's talking about the 601 for bigger heli) if we move the end points to 50% that gives us a total throw of 100 so it would be 1:1 for the 401? I think that's right...
Jermo

[Jermo]

PBMAXX will you run an experiment for me please?
Set the travel limits for the channel you are using for the gyro gain to plus/minus 50%, then re-run the settings. If I'm right we'll end up with 1:1 or pretty darn close.
for test data use settings of:
50% =
60% =
70% =
78% =
82% =

my hypothesis is that the gains will be 1:1 thus the expected results are: (plus/minus 1)
50% = 0
60% = 10
70% = 20
78% = 28
82% = 32

thank you in advance..
Jermo

[PBMAXX]

The travel limit for the gear channel will only let me change the positive setting. At 50%
I get

50% = 2 on the GY601
60% = 13 on the GY601
70% = 29 on the GY601
78% = 41 on the GY601
82% = 48 on the GY601

Is not being able to set the negative travel on the DX7 normal?Paul :glasses2:

[Finless]

Thats about 1.5 and Jermo NO the gain amount is the same movement for a 401 as a 601 man... So it's "about" 1.5 steps. Interesting that channel end points for the gain channelk didnt effect the amount.... I find that strange as if it is already working on 150% anyway... think about it... 150%... 1.5 steps :)

So Jermo you need to state that for every 1 value in the radio the gain to the gyro is 1.5. so 70 gain = (70-50)*1.5 = 30% gain +/- 1 %

Bob

[Jermo]

noted..:) I'll make the corrections...hehe..

THANK YOU BUNCHES for the help on this.. :noteworthy
Jermo

[PBMAXX]

just a note:
when you move the corresponding switch on the travel adjust such as Aileron or Aux2 you can change the negative travel. ONLY the gear channel won't let you change negative travel. Moving the switch does nothing :dontknow
Paul :glasses2:

[Jermo]

Depending on your radio you may have to change the function of the channel back to it's origional function to change the travel. On the DX7 you have to do this otherwise you have no way to access the negative travel setting.
Jermo

[PBMAXX]

Thanks J. I hadn't thought of that. I'm leaving it at 100 for now anyway :noteworthy
Paul :glasses2: