Freewing Reversing ESC will not Calibrate

[RC flyingfun]

I recently purchased the Freewing L39 and it came with a reversing ESC. I am unable to perform the throttle calibration on this ESC using a Spektrum radio. When I plug in the battery with the radio on, throttle cut off, and throttle wide open, it simply goes through the normal initialization process followed by a continuous beeping warning that the throttle is high. Any help with calibrating this reversing ESC would be appreciated.

[walterjohnson]

Try pulling the throttle trim all the way down first.

[RC flyingfun]

The throttle trim was all the way down.

[Evan D]

Have you plugged the yellow reverse wire into a channel that goes -100/+100?

[RC flyingfun]

The reverse lead is connected to channel 7 (AX2) with a range of -100/+100. This channel is assigned to a 3-position switch.

[Clugh]

Servo reverse switch? Futaba has to have it reversed in alot of cases to work right. Maybe that's the issue with you TX calibrating to the inverter maybe not.

[kallend]

Try increasing the servo “travel” in the TX to 150%. The default Spektrum travel is marginal for entering
calibration mode on these ESCs.

[Olivier_]

I have the same problem, I have a spektrum radio too. I applied all the solutions you indicated but the problem is the same. Did you find another solution?

[Olivier_]

Here is the video that explains the problem : https://youtu.be/8ek6SfhSHE8

I would like to point out that I do not have this problem with the same ESC, same brand, same model.

While watching the video, I also realized the following fault : the ESC beeps 5 times while the lipo is a 6S. Watch the video at 2min30 and 4min32.

Here are all the tests I performed to find a solution without it changing anything :

• test on another receiver
• modification of the minimum and maximum gas channel amplitude: -150 and +150
• connecting the throttle cable to another channel of the receiver: channel 5 (you can see the mix on the video GAZ to GAZ (ch5)
• modification of the amplitude of the minimum and maximum reverse channel: -150 and +150
• reversing the throttle reversal channel on the transmitter

Feel free to give me a solution that I can test !
thanks

[Evan D]

I'm not an expert on the ar637ta receiver but it is a forward programming receiver and may be "locked". It may have some programming in it that is preventing it from doing what your transmitter is telling it to do.