@Alex-Kushleyev
Thank you for your response and for helping us investigate this issue.
Please find our responses below to the questions raised:
Do you have PX4 logs of the VOXL ESC with one of the motors shutting down in flight?
Response:
Yes. The log file previously shared contains the PX4 flight log corresponding to the incident where one of the motors shut down during flight, resulting in loss of stability and the subsequent crash. The attached log is the same dataset we have been using for the failure analysis.
Is it possible that the aluminum enclosure is making contact with the ESC components, causing some kind of short? Especially during a crash, perhaps the ESC is making contact with the enclosure?
Response:
We do not believe there is any direct electrical contact between the ESC and the aluminum enclosure.
The ESC is mechanically isolated as follows:
A dedicated 3D-printed mounting structure is used between the ESC and the aluminum enclosure side walls.
Nylon spacers are used to maintain separation from the bottom-mounted aluminum heatsink.
The ESC is securely mounted and does not have any exposed conductive surfaces in contact with the enclosure during normal operation.
Based on the current mechanical arrangement, an enclosure-induced short circuit appears unlikely. However, we will perform an additional inspection of the assembly to verify clearances and mounting integrity.
Did you check if the motor temperature was OK after successful flights?
Response:
Yes. During successful flight tests, the motor temperatures were observed to be within normal operating limits and no abnormal heating was noticed.
What was the total current draw during flight when the failure occurred?
Response:
We have not yet extracted and analyzed the total current consumption at the exact moment of failure from the PX4 logs.I am currently coordinating with our team to review the logs in detail and obtain the current draw data during the affected flight. Once the analysis is completed, we will share the findings with you for further evaluation.
Please let us know if there are any additional parameters, diagnostic logs, or hardware inspections that you would recommend. We appreciate your continued support and guidance in helping us identify the root cause of this issue.
Thank you.
