#ESC throttle calibration and configuration with PWM receivers

4 messages · Page 1 of 1 (latest)

quartz hound
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I have a HappyModel EPW6 PWM receiver connected to a Hobbywing Skywalker v2 ESC. I'm running elrs 3.3.0. I can't get the ESC to enter throttle calibration mode or configuration mode (which is done by setting the throttle high in the transmitter before powering the ESC and receiver).

When I first plug in my ESC (which has BEC that powers the receiver), the ESC beeps slowly for a few seconds, indicating there is no PWM input. That is when the receiver has not established a connection to my radio. If my throttle is raised all the way up (as is required for throttle calibration and/or programming mode), then as soon as the receiver establishes a connection with my transmitter, the ESC starts beeping rapidly. That indicates it is receiving a throttle signal that is not in the "safe" low position, but it is also not high enough to go into the calibration or configuration modes. I have tried raising the throttle endpoint to the max value EdgeTX will let me to try and get a higher throttle output.... it didn't help.

I can use a servo tester to output PWM signals to configure my ESC... so I know the ESC works the way I think it does. So it seems the receiver is just not sending the signals it needs to do so.

Elrs is currently running in a 333hz packet rate with in 16ch Rate/2 mode for the plane I am working with. But I have tried other channel modes while attempting to calibrate the ESC and that didn't help.

It's there anything I should change it check to get the throttle calibration working? Are there any known problems related to ELRS PWM receivers and this type of ESC?

Thanks.

karmic quest
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Configure your RX, yes RX, so it will bind first start with the mode you are using. For example your tx uses 250hz. Select the rx start looking at 250hz first thing. That way your rx will link quickly. So your esc will accept high stick for calibration on bootup.

quartz hound
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I had already tried setting the Rx at 333hz, since that is what I was using in my tx. It didn't help.

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However, I think you were on the right path towards a solution. I plugged the Rx into an external bec attached to a battery's balance plug, discovered the ESC's bec from the Rx, and connected the ESC to a switch connected to the battery's main plug... This let me power up the Rx and establish a connection before turning in the ESC. It worked.