Jermo's DX7 Setup Video

[Jermo]

It helps, sorta... I forgot the 1.4 factor gets you to 22... but shouldn't THAT then be cut in half to account for the reduction from 100% to 50%?

I guess it doesn't really matter, since it gets you close and I will need to be adjusted anyway...

Sorry for being dense!

No it shouldn't be cut in half. The implied conversion from a range that goes -100 through 0 to +100 mapped to 0 through 100 is 1:2, However, the GY601 Gyro is exactly the same and has a display. Experimentation has illustrated that it's not 1:2 as expected. 1:1.44 works.

This is just a starting/general setting and is not meant to necessarily replace tuning for your specific setup.
Jermo

[WillJames]

The suggesiton is to set the Heli up for Neutral tail in Normal mode in hover, then setup the heli in heading hold mode and keep it there. This allows for stability in the event the gyro is reset in flight by a power glitch.


If the voltage gets low enough to reset the gyro, it is going to piro unless you are extremely extremely lucky. I know this from experience of 3 low voltage resets. Whether you setup for neutral in rate mode or not,(which I do on all but a 450) a reset is going to send you piroing. RCHeli mag has their information wrong.

[Jermo]

The suggesiton is to set the Heli up for Neutral tail in Normal mode in hover, then setup the heli in heading hold mode and keep it there. This allows for stability in the event the gyro is reset in flight by a power glitch.


If the voltage gets low enough to reset the gyro, it is going to piro unless you are extremely extremely lucky. I know this from experience of 3 low voltage resets. Whether you setup for neutral in rate mode or not,(which I do on all but a 450) a reset is going to send you piroing. RCHeli mag has their information wrong.

Will,
But hitting TH will save you right? if so I'll clarify that in rev3.
Jermo

[jayrob]

Skid - I'll put that in version 2 :) I'm working on that now. Just waiting for feed back on this one. V2 is alot different than V1 so far.. more detail..etc
Jermo
Jermo, thanks for the DX7 video! I'm a newbe setting up my T-rex 450 se with the DX7 don't know what I would have done with out your video. (and Bob's videos) But now I accually understand what things mean. One question: On the G3 simulator, the switch for 3d flight mode is on the left front. But on the DX7, the switch is different switch (second from the left on top face) Is this normal, or do I have something set wrong?
Thanks,
Jay

[slikrx]

It helps, sorta... I forgot the 1.4 factor gets you to 22... but shouldn't THAT then be cut in half to account for the reduction from 100% to 50%?

I guess it doesn't really matter, since it gets you close and I will need to be adjusted anyway...

Sorry for being dense!

No it shouldn't be cut in half. The implied conversion from a range that goes -100 through 0 to +100 mapped to 0 through 100 is 1:2, However, the GY601 Gyro is exactly the same and has a display. Experimentation has illustrated that it's not 1:2 as expected. 1:1.44 works.

This is just a starting/general setting and is not meant to necessarily replace tuning for your specific setup.
Jermo

Cool! Thanks so much! :thumbup:

[Hangarace]

Great video Jermo..Thanks for the contributiion :hug:
Dave

[Jermo]

TY Sir. I plan to have Revision 3 done by this weekend.
Jermo

[refugeefromcalif]

I look forward to the new DX7 video. I purchased a 450 SE V2, and the DX7 and I'm still trying to get everything right, (based on the Finless and Jermo Vids.)
I've been a plank flyer for about a year and thought I give the Heli's a try.
The G3 sim was a Great help to convince me to spend More money on this. :lol:
The 450SE is now my third heli, when I get it flying.

Thanks for all the good info and videos here.
George

[PBMAXX]

You better finish it :( Since I was the gyro guinea pig :mrgreen:
Paul :glasses2:

[BarnOwl]

TY Sir. I plan to have Revision 3 done by this weekend.
Jermo

Doing good, Jermo! Great vid keep 'm coming! :clappp

[bryce19]

Hey Jermo great video!! Do you think I could use this for setting up a DX6??

[Jermo]

Hey Jermo great video!! Do you think I could use this for setting up a DX6??

If I can get my hands on a DX6 I'll do a vid. I have an AR6000 RX coming for my Pixy so I'd just need a TX. If I'm able to make one of the Events I can film it there as well. Pretty easy with my laptop and camera.

Jermo

[markind]

That would be great! I am setting up my DX6 right now for a Helimax AXE CP. I'm having a halluva time... :arggg:

The DX7 video did help a lot, THANKS!! :noteworthy

A lot of the info does carry over to DX6.

~mArK

[Jermo]

I found an interesting statement on the Futaba site that explains 100% WHY a point of TX change is or isnt' 1:1, it's related to the Gyro gain setting :D

Direct from the Futaba site:
GAIN at the GYRO? GAIN at the radio? If you leave the gain at the gyro set to 100%, then you can adjust the end points of the gyro sensitivity channel at the radio and they will be linear. That is to say, they will be the same size steps as if you changed the gain at the gyro itself. If yuou set the gyro gain on the gyro to 50%, then each 1% change at the radio would have twice the effect (since there is half as much room to adjust) as if 1% change was made at the gyro.

[Jermo]

Ok..I did some testing today and need more time to finish rev3 on the video. Based on reading docs on Futaba's website I need to look at this a bit more.
If anyone has any questions please don't hesistate to ask Bob (Finless) or me. I'll do what I can to help but Bob has more experience.


Jermo

[ric4nier]

Hi
Just trying to figure things out,,,, do I set the gain to 82% or 72% or ?? on my dx7 with my 401 gyro?? Is it that important to fly in heading hold mode or is normal mode ok too?

Thanks
Ric4nier

[Finless]

Start at 72. The if you get no wag, increase gain until you start to get a slight wag and then decrease it 2-3%.

Bob

[no1b4me]

What should the default settings be on the Gy 401 itself?

[Jermo]

What should the default settings be on the Gy 401 itself?

subject to change, however,

80% gain on the gyro, if you have a digitial servo set DS on and delay to 0, Dir you'll set to make sure the gyro compensates in teh correct direction.

[no1b4me]

Thanks Jermo, your video was great. Thanks to you too Bob, your videos have helped me become a better pilot.

Keep um coming guys. :D

[DavidH]

What should the default settings be on the Gy 401 itself?


if you have a digitial servo set DS on and delay to 0

From the GY 401 instructions
•DS switch setting precaution
When the DS switch is set to the ON position, the rudder servo is driven by
approximately 270Hz high-speed pulses. This mode is for use with Futaba
digital servos only.


Only use the DS mode if it is a Futaba digital servo. Some of the other brands of digital servos use a different rate than Futaba. It could damage the other brand digital servo.

David

[Gary Evans]

I've read through all of the posts in this thread and it is somewhat confusing when gyro gain setting are discussed without specifying if they refer to using the gear channel or gyro set up.
Would it be possible in the new version of the video to explain exactly what values are needed use to achieve the initial 32% target in HH & normal for both methods (gear channel and gyro set up).

Thanks!

[Jermo]

I've read through all of the posts in this thread and it is somewhat confusing when gyro gain setting are discussed without specifying if they refer to using the gear channel or gyro set up.
Would it be possible in the new version of the video to explain exactly what values are needed use to achieve the initial 32% target in HH & normal for both methods (gear channel and gyro set up).

Thanks!

Gary, I'm working exactly that. I'm waiting on the results of a test that a gent with a 601 has. It has a Digital readout.

Revision 3 will have all the options for the Gyro.

Using the Gyro menu is an option just as using the Gear or Aux Switch. We will use the gear or aux2 Channel regardless.

sorry for the confusion. If you follow the video it will work. Just use 72 for the 0: setting.
Jermo

[Gary Evans]

Thanks Jermo!

[ric4nier]

Hi,
Thanks for all the videos they have been extremely helpful, not sure if I could get my trex 450se and my dx7 setup without them! I'm still having some trouble setting up my gyro 401 fut with my digital servo. I use to fly nitro heli's back 15-20 years ago, just getting back in the hobby. Don't know too much about heading hold mode on the gyro. I tried to set it up by watching the videos but still having some problems. I wasn't able to adjust the rudder throw by using the gyro as in the video, it just didn't seem to do anything, and I was trying to adjust it in the normal mode. So in the normal mode I adjust the throw's by using the radio say about 30 on L and R. It seems to be working ok in the normal mode. When I try to adjust it in heading hold mode, If I hold the rudder stick full left it will continue to move left and then bind the servo, and I even broke rear assembly and had to replace it. If I move the rudder stick fast left then right it seems ok but If I hold it full in either direction it will have too much throw.

Not sure if I should try to fly it in the normal mode? or try to fiqure this out to use the heading mode. I hovered it for the first time yesterday and it seemed to be ok but need to adjust a few things, not getting enough pitch range only +9 -9 but I think I got that figured out because in my swash setup it is on 50% so If I adjust that to 57-60 might correct that?

It was a short hover though because I learned the hard way ,,,, that you got to make sure that the pinion gear is on the motor correctly. I had it set too high and the set screw chewed up my main gear..........nothing is easy.

Thanks
ric4nier