Gvars... Wassat!!!

[jhsa]

Kaos, you're asking for trouble, she's gonna slap ya

[Flaps 30]

Jeez, Flaps 30 asked to see your files....FILES. So where is/are the file(s) ?????

That is what is needed. Come on guys!

Kaos, you're asking for trouble, she's gonna slap ya

Ohh don't worry.. His name is in my black book for now.

[jhsa]

ok. I came back from the field and realized that My EZstar puts the nose down when I throttle up..
I could correct it mechanically and I probably will. But not before I do a little test.
Will program the tx to give a bit of elevator offset when I increase the throttle and a pot to control how much..
Will do that with mixes and then with the GVARS to see what the differences/advantages are in this case..

João

[Rob Thomson]

Honestly... For one mix. Not much!

Advantages come when using it as a glob all setting for lots of mixes

Sent from my GT-I9300 using Tapatalk 2

[jhsa]

if it saves one extra mix, it is already an advantage, don't you think?
But will do it just for fun and to learn..

[Rob Thomson]

Usefull for learning I guess.

To me then benefit is back central point to control lots of servos.

Sent from my GT-I9300 using Tapatalk 2

[kaos]

Usefull for learning I guess.

To me then benefit is back central point to control lots of servos.

Absolutely. Probably 95% flyer won't need GVAR to fly. but of course, the nerds have to be the 5%.

Ohh don't worry.. His name is in my black book for now.

[Flaps 30]

It won't be for long Kaos.. You know the silent treatment and how it works.

Files please...

[kaos]

sigh........... leave me to fantasize what's going to happen again.

one of my two tx is using ersky9x and the eepskye is not ready yet. the other one I just loaded with open9x beta test version then removed the SP board, now I am stuck cause the HK USBASP is DOA (remember that one;) ), waiting for another programmer. I have no way to test it or simulate at this moment. Once I can get my hands on the sim for ersky9x or back to er9x with the other tx. I will make one to adjust the expo/dr 1st (cause that is what I am planning on doing at the 1st place, but side traced by all the fun mods lately ). will post the file then.
will try to make one for expo/dr in head, but no way to test it yet.

edit: hmmm, took a quick look. not sure GVAR is implemented for expo/DR in ersky9x yet. someone with er9x or open9x may need to send a file here. I am stuck.

[MikeB]

GVARs should be OK on ersky9x for expo/dual rate, not supported by eepskye yet.

Mike.

[Flaps 30]

Cheers Mike. I'm sure given time that will be sorted.

Gvars isn't supported by Ted's mind or mine for now. Don't know if that will happen for a while yet.

[kaos]

ha it works. This is for ersky9x. just did not realize how to get GVx out.
once into the expo/DR menu (with graph), highlight expo or DR(weight), long press 'menu',
you will get GV1-5, Assign any GVx for expo or DR(weight),
in GVAR menu set GVx to p1-3. turn the pot1-3 expo /DR will change. (look the expo/DR graph)

As Mike stated, expo is limited to -100 to 100, DR is 0-100 when pot move beyond that it won't change any more.

I think this may be the 1st variable expo/DR on the fly available on any tx. At least I never heard of. (But , what do I know about any tx, only used T9x. )

Fantastic! Thx Mike.

I am sure this works for REN (encoder as well), don't have a simulater, wonder each click on the wheel is equivalent to x? that is even more convenient to change expo on the fly.

now just need to figure how to tell ersky9x to announce the set expo/DR through voice once set.

As for the 'flap' part, it does not even need GVAR. it is set by P3 (on my model) just by turning the p3 will set the variable flap. same thing, need to figure out how to voice announce the set flap degree. I want to make sure Flap 30 (degree) will be announced 1st.

[G550Ted]

I want to make sure Flap 30 (degree) will be announced 1st.

Watch out, you're playing with fire!

Ted

[G550Ted]

ok. I came back from the field and realized that My EZstar puts the nose down when I throttle up..
I could correct it mechanically and I probably will. But not before I do a little test.
Will program the tx to give a bit of elevator offset when I increase the throttle and a pot to control how much..
Will do that with mixes and then with the GVARS to see what the differences/advantages are in this case..

João

I have an over-powered Bixler (Ezstar clone) that really buries it's nose with high throttle. I suggest forgetting about any mechanical tweaks (and how could that work in any case) and just set one simple mix. IIRC I mixed 15% down elevator starting at 50% throttle and ending with the full 15% when at full throttle. Using GVARs for a variable mix would be an exercise in using GVARs to tweak the offset, but throttling is a dynamic that I doubt any programming will compensate consistently. That's why you have the elevator stick or just add a gyro and fuggitaboutit.

Ted

[jhsa]

Yeah, the idea of adjusting is to do it just once and then copy the value to a mix..

[GyroGearloose]

Another usage as described by Rob, is if you have several mixes that need the same weight for example, but you need to adjust it frequently. Instead of having to change weight from 90 to 80 on 6 different mixes, you'll set the weight of all 6 mixes to GV1, then you only need to change the value of GV1 from 90 to 80 in one place and all mixes will be adjusted.

But normally we just adjust the weight once and that's it, so what's the point?
I can see it being usefull to fine tunning a model in flight but that's it.. after that you just set a fixed value for the weight, offset, whatever...

And as for replacing all the weights with one GVAR, that simply won't work because. the different mixes need different values..

Or maybe I'm missing something..

I'll throw in my 2 cents (before Obama steals that as well)...

I haven't played with GVARs at all yet (been very busy with "RealLife" and not able to experiment so much as being lucky to get out and fly my well-established birds for a couple minutes a day), but I have to say I see a HUGE advantage to them in some places. I wouldn't discount the "fine tuning and set it once" aspect, because I spent a lot of time before ER9X endlessly tweaking parameters trying to get curves and ratios right -- the ability to put it on a pot and tune in flight (or at least instantly during touch-n-gos) is invaluable! Sure, you read off what your final values are when happy, but finding those values can be a BITCH without rapid on the fly tweaking ability. GVARs is a great addition to that by letting you co-adjust related cyclics or flaps or even ailerons and elevators (esp. when like me you tend to program each separately to do elevons and flaperons).

SO: to the developers of Open9X, bravo... excellent ability no one knew they wanted, few understand now, and we all love after the fact...

-Gyro
long absent, senile, not dead... really...

[jhsa]

excellent ability no one knew they wanted, few understand now, and we all love after the fact...

Couldn't agree more.

[kaos]

I want to make sure Flap 30 (degree) will be announced 1st.

Watch out, you're playing with fire!

Ted

you may die peacefully, you may die crash and burn. In the end, it is all the same: dust to dust, ashes to ashes. same cold dirt around you. and, if you are lucky, you get crushed one more time by a heavy stone on top of you.

[jjreds]

The below mix allows differential aileron flight trim adjustment to fine tune the axial roll of an aircraft via a pot. (Thanks Pat MacKenzie!)

Works great on pattern planes and flying wings w/ super high roll rates BTW....but a PITA to save the results for subsequent flights.

The idea that the settings could be locked in via a switch (soft?) using GVARS instead of hard coding the results into the mixes or limits intrigues me. See this post Case 2.

diffAILwP3.eepm

(5.58 KiB) Downloaded 351 times

Channel 8 being used to display the value of P3 on the TX.
Triple rates on the 3-pos switch.

Question: Would the attached lend itself to the use of GVARS and if so where would you start?

[Rob Thomson]

Well... yes. 100% it would help in this scenario.

What you do is assign the aileron differential value (open9x) to say.. GVAR1

You then set a custom function to use a pot to adjust GVAR1.

Result... you can dynamically adjust the differential using the pot.

Once you have the differential at the value you like.. simply disable the custom function! Value is then locked.

[jhsa]

and simply insert the value in the differential field. then you can use that GVAR for something else..

João

[jjreds]

thanks Rob. Is it possible w er9x?

And jhsa pls point me to the "differential field"

Jim

[Rob Thomson]

No idea. I guess it is - but I have not used the er9x gvar feature yet. Only open9x

[jhsa]

thanks Rob. Is it possible w er9x?

And jhsa pls point me to the "differential field"

Jim

This is valid only for open9x.
it is in the edit mix menu. You can set differential there.

Just go to the channel you want to edit, press menu long, and scroll down to "curve". then choose "diff" and set the value.

[jjreds]

Using Open9X/companion 9X and after loading open9x for stock board w/ gvars checked I created the following:

Ail_Diff_GV1.eepe

(4.84 KiB) Downloaded 295 times

This works in the sim if you use GV1 in the mix and adjust GV4 in the custom function (bug?), haven't tried it in the TX. Can't simulate turning off the function and storing the value but I don't care because......

This is a LOT easier than the solution in my earlier post which used (11) extra lines in the mixer and (3) custom switches, WOW!

Jumping on the Open9X bus, thanks for the great advise and support.

Jim

[Rob Thomson]

Thanks for the feedback.

I suspect a companion bug for the gv4 issue.

Sent from my GT-I9300 using Tapatalk 2

[MikeB]

This is valid only for open9x.
it is in the edit mix menu. You can set differential there.

Next revision of er9x will include differential, with the option of using a GVAR as the value to allow adjustment in flight.

Mike.

[jhsa]

Great..

Thanks Mike.

João

[frediix]

On er9x, here is what they do.
------------------------------
Description of GVARS in er9x, 04 Mar 2013

GVARS may be used in a number of places.

3. EXPO and Dual Rate.
The expo and dual rate values may be set to use a GVAR. This allows the values of these to be adjusted in flight.

How can I set dual rate to use GVAR? (er9x-r788)

[kaos]

look here: http://opentxforums.com/forum/viewtopic ... 955#p42557