E7 flight today!

[flyalan]

Well I did manage a test flight this morning before work.  Unfortunately the wind sock was straight out so trimming was out of the question.

I do have an issue.  I seem to have a head wobble.  Everything is tight.  I lowered the gains down to 60 to see if it would disappear but it did not.  Gets a little better at higher head speeds.  Really bad at 1850. At 2150 it smooths out some but I get an oscillation about every two seconds or so.

I did notice the head has a bit more loose at the grips than my N5.  The outer grip washer is 0.5mm and the dampers are quite loose.  No other washers in the kit to use so I have ordered both some more 0.5 and 1mm washers in addition to another set of dampers.  Will this fix it? I was under the impression that more dampening was necessary at higher headpseeds not lower one.

Any other suggestions?

thanks Alan

[bkervaski]

Alan - what flybarless system are you using?

[flyalan]

Hey Brian,
CGY750...

Thanks
Alan

[bkervaski]

It could be mechanical but I'm willing to bet its just the AIL/ELE head response value, try raising it a pint or two.

What servos are you running and at what voltage?

- Bill

[flyalan]

Bill,

Using BLS351's @6V. Where is the Ail/Ele head response value?  Expert Menu?

Thanks
Alan

[bkervaski]

Yep, expert menus.   Probably set to 1 or 2, should be higher for those servos at 6v.

[flyalan]

I will check that this afternoon.
Is anyone running 1.2 firmware?  Looks like there are some issues with it from what I am reading elsewhere.


Sent from my iPhone using Tapatalk

[bkervaski]

Definitely upgrade to 1.2, it flies better than the previous version when properly setup, the only real problem I've seen is people not being able to set it up effectively due to the new features/settings, I've been able to solve every problem someone comes to me with, usually it's the head response or servo refresh rate setting.

Here's my notes for good general starting settings, this will get you the "VBar" feel with the fast off center performance of the CGY750, best of both worlds:

---

ROT Equa = ON (Piro Comp)

PhaseEqu = ON (check correction direction)

Head response ... low number = faster response + more heat + greater tendency to bobble .. raise to lower temp and remove bobble effect, can be different for each axis

Servo refresh 285hz for all Futaba digital servos

I gain on AIL and ELE set to no more than 35%

D gain set to anywhere between 0 and as much as 50%

Start with AIL and ELE total gain at ~65%, lower as needed

AVCS.DMP set to 100% on AIL and ELE

AIL/ELE Rate constant set at 150%

AIL and ELE control feel to somewhere between 7 and 10

In some cases, increasing the ELE Stop Delay improves ELE bounce. The higher the I gain, the more tendency for bounce. Run I gain no higher than needed for good straight line tracking and stability

Decreasing the control IN delays to little or nothing improves the linearity of the control feel and makes the model feel less "sticky" off center

Control OUT delay on ELE set to 8-10; 6 works pretty well on AIL. Remember to do both sides of stick travel.

VERY important that the swash AFR's be maintained in the 50-60% range for your referenced cyclic range

Excessive I gain usually shows up in a bounce at the end of abrupt ELE input

The slower your piro rate, the lower the ROT.His value will be. The secret to tuning is to watch the disk and get it to stay as level as possible

Use lower gains for NORMAL and HOLD flight modes so the disk doesn't fight ground effect in autos, you get that "decayed" felling during autos this way, mine are 40/45, idle1 is 50/55, idle2 is 60/65

---

[flyalan]

Thanks for all of that Bill!

I went through the setup a few minutes ago and made changes as suggested.  Will give it a try tomorrow afternoon hopefully.

Thanks
Alan

[bkervaski]

Don't forget to re-check your directions before flying, let us know how it goes.  I'm going to do a CGY750 tuning flow chart when I get some free time.

[flyalan]

Will do.  I wrote down the each menu step on paper first then compared it to your suggested values and at that point went back through and made the changes. 

Alan

[flyalan]

Flew the E7 today.  Again very windy so a trim flight was out of the question.  Does need some trimming though.
Bobble is gone.  Kept gains at 55 on Ail/Ele and 50 on rudder.  That and the settings Bill provided are working fine.
I did replace the outer 0.5mm spacer on the head with a 1mm.  Tightened the head up just right.  Now exactly like my N5.

I do need some advice on timing for the Hacker.  Motor came down pretty hot.  Could barely hold my finger on it for 2 seconds.  Only did some flips and rolls at 2050 head speed.  So what should my timing and PWM be for this using the Castle ICE HV 80?  I understand Hackers run bit hotter than some but is this good hot. Didn't have my thermo gun to check the temp...

Thanks
Alan

[Tommy Wagner]

I use the settings that Matt posted in the set up and it runs warm.  One thing I did notice if you wait to check the temp 1 to 2 min after the flight the motor will be hot, but when it first comes down it's warm. The longer it sits the hotter it will get.


Tommy

Sent from my iPhone using Tapatalk

[Branden Wheaton]

That is true about the temp getting hotter after a flight with the heli just sitting there due to the fact there is no air moving across the motor.

[Chris Sexton]

I run the hacker a50-12l with a cc120hv. I run medium timing and 8pwm and the motor doesn't get overly hot.

I fly sport big air. I did spend an entire battery working on elevator tic tocs and the motor was still only warm on landing.


Sent from my iPhone using Tapatalk