[Solved] Motor Kicks Whilst Downloading Data
If I download data using a USB cable with the heli unpowered, everything is fine.
However if I download data with the model powered, the motor kicks several times per minute. Each time the head rotates about 45 degrees. This also happens if I am downloading to the Android app.
Both throttle cut (0%) and throttle hold (approx 20%) are active so the throttle value is 0%.
I am using a Scorpion Tribunus II 06-120A ESC and its governor.
I hadn't expected the motor to kick whilst downloading data.
The configuration file was saved with the transmitter turned off, without following the hint in the message that appears when saving the configuration.
We are therefore unable to be able to verify what the input Throttle value is when the model powered up and is connected to the software.
We point out that when you go to pages 8 or 9 of the Wizard, Check Mode is activated (which can also be activated manually using the checkbox in the Advanced => Common tab => Servos section).
When Check Mode is active, the Throttle Cut of the Fail Safe of the flight controller is activated and consequently the green LED of normal and complete radio signal reception is turned off.
The Throttle Cut replaces the incoming Throttle signal with a signal that corresponds to exact zero for the flight controller.
If the zero Throttle signal sent by the transmitter does not correspond to the exact zero in Wizard panel 5 but is a slightly positive or slightly negative value, this could be the cause of engine movements when Check Mode is activated.
As is well known, Flight Logs are stopped and deleted when the USB cable is connected to the flight controller because with the cable connected the model is definitely not flying and maintenance is being performed instead, therefore, there is no point in unnecessarily taking up space in the Flight Logs memory.
Therefore, we are not able to see the problem in the Flight Log you sent us.
Can you check to see if while you are in the DIAGNOSTIC section, Real Time tab with Real Time active, is the problem occurring? If so, you should save the Real Time Log and send it to us so that we can analyze the behavior of the input and output Throttle signals.
Finally, we have activated your FCU so that it can also load beta firmwares, which compared to Alpha firmwares are at an advanced stage of development and close to an official release.
We therefore ask you to update your flight controller with the latest Beta firmware 3.4.112 in which among various other things there are improvements of the serial communication of the SYS port to which an external Remote USB or an external Bluetooth dongle can be connected or the internal Bluetooth of the flight controllers with Bluetooth (which is connected to the SYS), and let us know if you notice any differences related to your problem.
As a side note, if you haven't already seen it, we point out that the vibrations in your model are crazy, reaching almost 2000%.
We suggest you take action to prevent any contacts from slipping off in your model, screws from loosening, or screws from breaking while you are flying.
Many thanks for the detailed response.
I went to the Diagnostic section and started a real-time session. With that running, I went to the download screen and started downloading. As in the past, the motor kicked and each of the cyclic servos and tail servos also kicked. I hadn't reported that in my initial message.
Attached is the real-time file.
Following that, I downloaded the beta software, replacing ver 3.4.103 with ver 3.4.112. Please note that I made no configuration changes to my transmitter nor to the Brain unit. I downloaded a recent log and there were no motor kicks or servo kicks, so it is looking good. Note these are all bench exercises. I am not at the field so haven't flown this version yet. Is it OK to fly it?
I will look further at the vibration issues.
Yes, of course you can fly the Beta version (you could also fly the previous version since you certainly don't fly with the usb cable connected to the flight controller).
However, you have to reduce the vibrations of your model because with such high vibrations you risk damaging the mechanics of your model. If you have already done a dozen or so flights, we suggest you check all the model's tightenings to make sure none have loosened.
Many thanks for all your assistance.