Topics created by Jimk_Aero

Hi @Jimk_Aero ,

Sorry to hear about the problems. Not being able to power off USB does make this hard and is a carry over from the VOXL Flight....

Even without ESC calibration, you can manually attempt to spin a motor, if using PWM, via this: https://dev.px4.io/master/en/middleware/modules_command.html#pwm
Do you have an oscilliscope? You could probe the PWM channel output pretty easy (pins 2-5 for a quad) and see if you see any signal coming out of the board. If there's no signal, when you expect it, on a single channel, try to look at those ESD diodes right next to the connector and check for any fried parts.

PX4 FW version you are running? There are two programs to handle some edge cases, px4-esc-cal-tool-v1-11.py and px4-esc-cal-tool.py

@Jimk_Aero

Sorry so hear that you're still having problems. The built-in BEC shouldn't be required for basic use case. Unless you're trying to power some other on-board electronics/avionics with the BEC.

All you should need is the "power in" to all 4 esc's from a PDB and then signal and ground from esc's to flight core J7, via the breakout board.

Modalai's breakout board was designed for PWM signals only and works well in that regard. Also check to make sure that DSHOT_CONFIG
is set to "disable"

Here's some notes from our board designer to clarify.

The primary design intent was to be used with a distribution board for power

It is actually unsafe for these types of pin headers to have exposed voltages on them

We wanted to prevent some customers from accidentally installing two BEC generators on these blocks which occur all the time in other hobbyist forums/kits and customers end up damaging their BEC modules.

We apologize we did not make it clearer this is just a breakout board and not a BEC distribution block.

Our PWM breakout board does not have the positive rail connected.

Thanks for your suggestions. I ran the pwm test command in the MavLink console and confirmed all motors except the suspect one so looks like I'm going to replace an ESC. I do appreciate your guidance.

@Jimk_Aero Please ignore the previous question. I just needed to reboot the Flight Core and all is OK.