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HomeRC & Power✈️Aircraft🚁HelicopterFlybarless Rotor Head SystemsFutaba CGY › Consolidated V1.2 tips
04-02-2012 12:27 AM  7 years ago
JPhillips

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Waco, TX

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Great day of flying! Much happier than I was before with my CGY750. I was banging aileron tic tocs but found it a bit too slow for me to really bang through them. So I raised my rates to 65/65 aileron/elevator, respectfully, and removed the expo in both aileron and elevator expert menus and it really woke it up! I let my buddy fly it and he even said it was a night and day difference. My aileron gain is around 65 and I still get a bit of a wobble @ 2100. I set the head response to 1 and it got worse, so I raised it to 3 and its much better. I can still see just a bit of wobble, but its nothing like it was before. Left I gain and D gain alone for now, now what do you suggest, Ben?

Thank you so much for your time here on the forum, your knowledge of the product and willingness to help is astounding and I (and others) wouldn't have been able to get to where I am without your help. I'm much happier now and not frustrated with it trying to get it dialed in. I was talking about tweaking this number and that and my buddy couldn't follow me. He said, "this damn thing has too many parameters!" I laughed and went through his setup and even got his flying much better!
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04-02-2012 01:48 AM  7 years ago
Dr.Ben

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Richmond, VA, USA

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Very good!

Tell me where your AIL and ELE I and D gains are now, please.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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04-02-2012 02:39 AM  7 years ago
JPhillips

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Waco, TX

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I haven't touched I or D gains yet because it began to rain as I was putting my last flight on my R90. I think I set my head response to 3, can't quite remember. Think I'm going to set it to 4 along with adjusting I and D gains and be happy. I really like the crispness of it now, I'm reading through the manual and there's a couple other parameters that I'd like to adjust as well. Can you tell me if I adjust the control delay in and control delay out, or control feeling, it will get even more crisp? What do you think?

Oh also, what is the pitch up/down parameter in the Ail/Ele expert menus? Is this pitch boost or something?

Looking forward to more flights now!

EDIT: just brought my heli inside from the garage, currently both I and D gains are at 30% and 200%, respectfully. What I was talking about the pitch is in the aileron and elevator expert menus and it says Pit Acce DWN-Off/Pit Acce UP-Off. Also, what is PIT Damp, default value is 10 n.

Thank you!
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04-03-2012 04:09 AM  7 years ago
jst1970

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Menifee, CA

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Trying to simplify my settings, and not being able to find a sheet, I started this spreadsheet - each sheet tab on bottom is a diff menu and settings it shows are my current ones. Just started it tonight.

Available for anyone to copy and use themselves, would also love to see some best settings for particular setups. I can host them all (or anyone can with a google account)

web page style
https://docs.google.com/spreadsheet...dkE&output=html

and this link is spreadsheet looking
https://docs.google.com/spreadsheet...dzQtdWNVV3BydkE
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04-03-2012 04:22 AM  7 years ago
rocket_33

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Mount Pleasant, Michigan USA

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Wow, awesome job. Thank you for sharing
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04-03-2012 03:16 PM  7 years ago
tayas

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North East of the USA

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Nice,jst1970
Thanks!!!
Would like to see different setting from other pilots.
Please add what machine is the setup for.
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04-03-2012 03:36 PM  7 years ago
pcw

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chicago

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Any thoughts on running BLS451 servos on 2S? Ive got AIL bobbles on my new 7HV. Everything Ive tried with I and D gains just leave the model feeling lost, not locked in. I havnt tried changing head response values yet. As Dr.Ben states over and over to keep servos powered at manufacturer spec. But Ive read BLS451 are OK on 8V?

Mavrikk FBL blades, HS 1800-1950 in IU, 1600 normal.
AFRs are set to 55 AIL 65 ELE, this is over 8 degrees. 50% on AIL gives 8 degrees.

No matter what I tried last night ended up with low overall gain on the Tx, around 45. ELE axis seems to perform pretty well, tho it was drifting with wind.
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04-03-2012 04:02 PM  7 years ago
rocket_33

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Mount Pleasant, Michigan USA

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By Futaba's specs that servo is limited to 6 volts, so you would not be powering it per specs. Therefore as Dr Ben points out you may have issues. If you want to run 2S straight then I would suggest the BLS 255HV.
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04-03-2012 04:06 PM  7 years ago
dkpodder

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Vinderup, DK

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Can't get rid of the ELE bounce too, on my Velocity 50.

Changed my BLS451's to BLS255HV, runnning unregulated 2S LiFe.
Tried I-gain down to 20, D-gain from 40-150. TX gain from 20-65. Nothing solves the ELE bounce in hover od FF. Head response at 2, should I raise this value ?

Also fighting a couple of other CGY750 problems: Rolls in forward flight looses all forward momentum, and the nose pitches up. Tried the ELE expert Ail->Ele from -25 to + 25 on both A and B sites. Is this the wrong setting for this problem ?

The gov makes some wierd stuttering from arround a little before half tank. When disabling the gov by a switch (and keeping the exact same RPM) it runs perfectly fine. Re-enabling the gov makes it stutter again. Tried adjusting the gov response and gain, but one flight it's ok, next it's stuttering again. Throttle servo is a 9202, could the problem be a slow throttle servo ?

The Velo 50 was flying fine on a V-Bar which was moved over to a Fusion 50 (because the need for electric gov support), and CGY750 was mounted instead.

Where to start, and what to do ?
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04-03-2012 06:03 PM  7 years ago
Dr.Ben

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Richmond, VA, USA

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Tell me where your swashplate AFR's are set to for 8 degrees of pitch.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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04-03-2012 06:36 PM  7 years ago
Zaaaguy72

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MN

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In which menu is the head response function?Team Sanjel!
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04-03-2012 06:37 PM  7 years ago
bkervaski

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Birmingham, AL, USA

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@Zaaaguy72 Advanced AIL or ELE menusTeam Synergy Factory Specialist / Scorpion / Thunder Power / Byron's Fuels
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04-03-2012 06:50 PM  7 years ago
JPhillips

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Waco, TX

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They're in the expert menus, go to the Ail/Ele menus and hold down the mode key to access the expert menus.
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04-03-2012 07:08 PM  7 years ago
Zaaaguy72

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MN

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ThanksTeam Sanjel!
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04-03-2012 08:06 PM  7 years ago
pcw

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chicago

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By Futaba's specs that servo is limited to 6 volts, so you would not be powering it per specs. Therefore as Dr Ben points out you may have issues. If you want to run 2S straight then I would suggest the BLS 255HV.
Thanks for the advice... any other input?
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04-03-2012 08:10 PM  7 years ago
jst1970

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Menifee, CA

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BLS272HV servos with a coupon code and 3pc discount at tower are like $131 delivered. I am about a half inch away from ordering myself....
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04-03-2012 08:32 PM  7 years ago
3dgimble

rrKey Veteran

Rochester

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Any word on if Futaba will release new update for CGY750?
I believe it would be wise for them to do so. Way too much adjustment needed for current firmware!
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04-04-2012 01:15 AM  7 years ago
Dr.Ben

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Richmond, VA, USA

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JPhillips,

Your questions about the mixers and the settings for I and D gain are covered in the very first post of this thread.

I want you to lower the D gain down to about 50 and then see how the wobble/bounce does. Esp on ELE, if you can raise the I gain to 40%, the nose will hold better in your rolls. Lowering the D gain as described should also allow you to raise the total gains a bit, and the higher they are, the better the system will fly.

In your PM to me you had mentioned you wanted to quicken the way the system felt to you. The first thing I would do is lower the control IN delays. You don't want to lower the OUT delays but so much, esp on the ELE axis, or you will induce ELE bounce at the end on control iputts in your aerobatics.

With respect to head response, a value of 4 on the roll axis may prove useful for reducing any quiver/wiggle in the skids that is otherwise improved with lowering the AIL total gain. On my model, I have found a head response of 1 worked better than a higher number for optimizing the stops and feel on the ELE axis. I wish I could give you absolutes on the head response settings, but they are highly dependent on model and servo choice especially. For those running non-Futaba servos, be cautious running head response of 1 and especially if you insist on overvolting 6V rated servos with 2S lipo power suppies or even LiFE voltage. The liiting facotr here is servo temps. If you drive them too hard, they'll get hot, and this does not otherwise occur. On average, if your current consumption per flight exceeds 550mA or so and the head response is at 1 or 2, be thinking about going up a number on the head response.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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04-04-2012 03:11 AM  7 years ago
Gator1

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Thonotosassa, Fl - Usa

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It seems I have all of my 750's pretty much dialed in but noticed something tonight while playing. I know the trim flight you should have the gains set to 50% in norm but I still get a lot of swash movement when I move the heli around, if I turn the gains down to 0 then no movement. I'm thinking if I want to trim with no help from gyros then it would be better to have gains at 0 for trim flight.
Any thoughts?
T.O.R.C.H.S. Orlando Member And T.R.A.C.S. Tampa Member
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04-04-2012 04:16 AM  7 years ago
Dr.Ben

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Richmond, VA, USA

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If you can find a dead calm day, gyros off gives the most accurate trim. Remember the model will be more sensitive to control input.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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HomeRC & Power✈️Aircraft🚁HelicopterFlybarless Rotor Head SystemsFutaba CGY › Consolidated V1.2 tips
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