Hi all,

It was my first run with the Trex doing circuits, as I had only been using it in the backyard, mainly hovering & setting it up until recently.
When I discovered the other day, that my PH-35 can't handle 100% throttle curve in "Fixed Throttle" mode (Gov doesn't work on mine).
It kept cutting out, not completely as I use soft cutout, so it just starts to die down, then cuts back in. It was happening upto about 3-4 times per flight and each flight was only a few minutes long as I kept having trouble.
I found it was much worse in flight mode "ST.3" then what it was in "ST.2" mode. The only main difference between mode 2 & 3, was that I had the throttle curve set a lot higher in "ST.3" (~100, 95, 90, 95, 100.), so it had higher headspeed for 3D flying.
So I dropped down all the throttle curve percentages to something like 95, 90, 85, 90, 95. and it seemed much better, but by then the battery was getting flat, so I had to leave it till next time to test it again.
Well I tested it the next day again at a slightly higher curve (~98, 92, 88, 92, 98) and it was a lot better.
It never cutout at all, except for when I thought it might have been something else (the Hitec eclipse 7 calibration fault) maybe too, and decided to put it back to 99, 94, 88, 94, 99 and it did glitch again only once, so I have put it back down a bit again.

My setup as follows:

T-rex 450XL
Align 400SF 2800kv, 13T
Phoenix-35
3 cell TP2100
Wooden 315.

Has anyone else experience similar problems with theirs.
.

Cheers, Hayden.

What kind of motor/battery are you using?

I had trouble like this too, I ended up turning the PWM frequency up from 13khz to 26khz, then up to 52khz. it got better at 26khz, and it was perfect at 52khz. Don't know exactly why it works but you can try that.
Check your motor and speed control temp when you do this, CC claims that the temperature can go up when you up the PWM.

Toby

I have edited the post with the setup details.

OK thanks for that. I was reading some stuff earlier about how a higher frequency may help some out-runner motors run more efficiently.
So I might give it a try.
.

Cheers, Hayden.

Hayden,
What version of the software for your ESC are you using? Some of us have experienced problems with the setting on "insensitive" with the 1.11 software. I had to set my current limiting to "disabled" to stop the same problem you are having. I believe there is a bug in the software. Others have gone back to an earlier version of the software to aleviate the problem. I don't believe your combination of motor and battery will ever exceed 35 amps anyway.
Use standard timing and disable current limiting and give that a try. The Pheonix Link makes short work of programming the ESC. Get a good grip on the Heli from the bottom of the frames and hold it over your head and open the throttle to test if it is working okay. "Hold on tight"
Gary

PS: Wear some safety glasses while testing!

Here are my settings, I'm using firmware version 1.10R.

PH-35 settings.

Cutoff Voltage: Custom 8.2v
Current limiting: Insensative
Brake: Disabled
Throttle: Fixed
Timing: Advance
Cutout: Soft
Soft Start
13 khz freq.

I never really had a problem in the backyard, I think It may have only done it once or maybe twice just after I put the new 400SF 2800kv in it. It was only once I got out in the open and started to throw it around a bit, that I noticed it.
.

Cheers, Hayden.

I am using 1.11R with current set to insensative and the high PWM (running a custom outrunner brushless too).

I tried some of the older firmwares (1.10, 1.02) to get governer mode to work, it never did. Never tried changeing the current sensitivity. I'll have to give that a try.

The way i actually found the problem is:
I Set my pitch curve to 0 deg all throughout (50 50 50 50 50). Then I run it up to full throttle slowly, when it hesitated before it reached full throttle i uped the PWM and tried it again.

The latest version may have an error in current limiting function.

I am using V1.11R with no current limiting.

AON V2815-3500, CCP35A, Governer High.

Kim, Hyung Kwan.

Hi Hayden,

I thought there was an issue with the CC ESC and the Align motors?
I also heard that the software update fixed that problem?

How's tings?

Laughing at yourself will lengthen your life. Laughing at me will shorten it...

The CC seems to work pretty well with the Align 400S/2800 motor, even with the 1.11R software.

It appears that the CC ESC/1.11R software and the JGF 400DH motor are incompatible. I'm going to try rolling that one back to an earlier version and see if it will run.

Dave