Do I have a faulty pwm?

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1

Hi all, sorry if this is a repost, but I didn’t manage to find the (exact) same question.

I recently purchased a Pixhawk to replace my APM 2.5+ on my quadcopter. All components of the quad were the same, except for the Pixhawk, GPS+Compass, Telemetry, PPM encoder and PWM. When I was trying to start it earlier I noted some strange behaviour, such as the ESCs beeping to indicate an error. I played around with the setup and discovered that the board will only get power if the ESCs are connected to the output channels of the Pixhawk. I’m assuming that this is the BEC circuit powering the board. I can also power the board through the USB cable.

I’ve attempted to run motortest through the terminal, but again the ESCs beep at me, but motors won’t spin. I’ve tried to perform ESC calibration, but then they don’t respond at all.

All the wires of the pwm seem to be intact, so my question to you guys is; Have I missed something, or do I have a faulty pwm? It’s driving me crazy!

Thanks a bunch!

/Josh

2

@CptStubbs,
When you say PWM due you really mean Pulse Width Modulation or do you mean Power Module.
If you mean Pulse Width Modulation then your post is in the wrong sub Forum and should go in an ArduCopter sub Forum.
Otherwise, if you mean Power Module then you are in the right sub Forum.
Regards,
TCIII GM

3

Yes, I mean power module. Sorry, I thought pwm was short for power module, had never heard of the Pulse Width Modulation.

4

Hi,

If you have a voltmeter you can check the power module pads.

5

Yes,

measured the voltage today and it was approx. 3mV (i.e. way to low).

I contacted support via mail, and I have a new one headed my way. Thank you for your help!

6

This post helped me. I had the same problem. Thanks. Still need to figure out if my apm 2.6, and ublox 6m are faulty as well. :frowning:

7

Hi

This Post helped me alot. I just find out that my PM was ok, and I shouldnt have had one on the way from China!!!
Oh well ok, maybe I can use it on another Projekt…:slight_smile: