ESC and Aileron Issue

msatin · March 24, 2020, 09:15:36 AM

Sorry in advance if I should have posted this in a specific forum.
Also - I suspect I may have to wait for help until we can get together again, but thought I would get the collective brain trust working

Problem 1 - I am having the same ESC calibration issue with 2 new planes from different mfrs
The ESC calibration is sucessful, and while the battery is connected works perfectly. Throttle cut works, and motor spins up as I increase throttle
However when the battery is disconnected and then reconnected, the motor immediately start spinning when I flip the Throttle Cut switch off, even though throttle is at Zero.
I have repaeated this many times each time the result is the same.
HobbyKing suggested I disable Throttle Cut, and calibrate. That worked until I enabled Throttle Cut again. Motor started spinning as soon as I flip the Throttle Cut switch off.
As long as Throttle Cust is disabled the motor behaves properly. Obvously this is not acceptable

Problem 2 - Aileron servos not behaving. When I use a servo tester to center the servos and check for full thro, they behave perfectly. When I plug everything in to the Rx, both servos jitter, buzz, and will only move in one direction. I tried plugging each servo in the Rx individually, with the same result. I tried the Rx in a different plane and everything worked properly, so it's not the Rx.

Thanks for any suggestions
Stay healthy!

bweaver · March 24, 2020, 09:23:40 AM

Hi Mark,

Pertaining to the throttle dilemma; is the throttle trim tabs also turned right down? I don't know if that will work, but if you test it, do only after you have removed the prop.

msatin · March 24, 2020, 09:29:24 AM

Thanks Bruce.
I have to yet to put the props on - TEMAC has taught me well

The throttle trim does solve the problem..sort of.
In the couple of times I tested this way, the Tx does not seem to retain the throttle trim setting after turning it off then on. I could be wrong on this, and will try again.

msatin · March 24, 2020, 09:38:23 AM

I may have just fixed the problem.
With the Throttle Cut switch disabled, set the throttle trim all the way down.
Calibrate the ESC.
Once working, re: enable the Throttle Cut.
That seems to have done the trick.
I will continue to test just make sure

bweaver · March 24, 2020, 10:55:36 AM

Quote from: msatin on March 24, 2020, 09:38:23 AM
I may have just fixed the problem.
With the Throttle Cut switch disabled, set the throttle trim all the way down.
Calibrate the ESC.
Once working, re: enable the Throttle Cut.
That seems to have done the trick.
I will continue to test just make sure

That's what I was trying to tell you, but not in so many words. Glad that problem is fixed. Now on to #2. (Where is that TP?)

msatin · March 24, 2020, 10:58:32 AM

Your suggestion is what got me to the fix Bruce - Thanks

msatin · March 24, 2020, 01:12:24 PM

A couple of other observations re: aileron issue
1 - Netiher servo moves when I move the stick to the right. Both exhibit the "weirdness" i described when I move the stick to the left
2 - When I connect both servos to the servo tester using a Y harness, and manually move them, both servos work exactly the way they should.
3 - Elevator, Rudder, and now motor all working properly

sihinch · March 24, 2020, 02:05:02 PM

If they are normal with the servo tester I'm pretty sure it's a Tx issue (set-up, mix, channel assign or something.)

msatin · March 24, 2020, 02:31:48 PM

I was thinking that as well Simon.
However, I even copied my Apprentice config to a new model in the Tx with the same result.
Ah well. Will probably have to figure it out at the field when normal life resumes

bweaver · March 24, 2020, 06:03:01 PM

Regarding the aileron problems. Does the Rx have stabilizer feature in it?

msatin · March 24, 2020, 10:29:54 PM

Nothing in the description about stabilization
Here is the link
https://twistedhobbys.com/receiver-micro-6ch-dsmx-dsm2-crack-pro-2-4ghz-spectrum-jr-w-satellite-port-diversity-antenna/
FYI - I positioned the Rx in a several orientations which did not make a difference.
I doubt this has any bearing, but I had to stay relatively close (less than 1M) to the Rx to get it to bind.
I'm going to send a note to TH to see if they have any thoughts

pmackenzie · March 24, 2020, 11:39:56 PM

It does not specify what type of DSMX it is. If it is 11 msec, and your servos are analog, that could be causing your aileron problem.

msatin · March 24, 2020, 11:45:59 PM

The servos are digital.

I did get a very fast response from TH as follows:
"We do not recommend setting up those servos with a y connection, they will not get the amp/voltage. Use the gear or alux for other aileron setup"

I presume this means one servo goes on the regular aileron connector, and the other to either gear or aux.

Thanks for responses gents