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SOLVED: Tail servo jitter when turning on transmitter https://www.spirit-system.com/phpBB3/viewtopic.php?f=20&t=6200 |
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Author: | Helihello [ Sun 15. Sep 2024 14:46:29 ] | ||
Post subject: | SOLVED: Tail servo jitter when turning on transmitter | ||
I bought an SAB RAW 500 second hand (without FBL) with MKS HV9767 cyclic servos and an MKS HV9780 tail servo. I now installed a Spirit GT and wired everything up as in the attached file. My receiver is an FrSky R-XSR that I flashed with F.port firmware. I have a Radiomaster TX16S II Max transmitter in which I created a blank model and only configured and bound the FrSky R-XSR receiver (FrSkyX2 mode, LBT(EU) protocol). When I connect the battery (LiPo 6s 4000 mAh), the tail servo occasionally makes a slight noise (the cyclic servos only initialize and then remain quiet). Then when I turn on my transmitter, the tail servo starts jittering like crazy. When setting up the FBL via the wizard, I entered the correct frequency values for the tail servo (760µs/560Hz) and the cyclic servos (1520µs/333Hz) and I chose FrSky F.Port as the protocol. Does anyone have an idea of what could be the issue? I hope the tail servo is not toast ![]()
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Author: | Mattes61 [ Sun 15. Sep 2024 18:10:29 ] |
Post subject: | Re: Tail servo jitter when turning on transmitter |
Hello, The switching on sequence is wrong, the remote control is always switched on first and only then the helicopter and not the other way around, this is a fundamental error in operation! Regards |
Author: | Helihello [ Sun 15. Sep 2024 19:27:17 ] |
Post subject: | Re: Tail servo jitter when turning on transmitter |
Mattes61 wrote: Hello, The switching on sequence is wrong, the remote control is always switched on first and only then the helicopter and not the other way around, this is a fundamental error in operation! Regards Yes, you're totally right, that's also how I did it apart from the first time when binding. So, indeed, when I connect the battery with my radio transmitter on and the RAW 500 model selected, the tail servo first makes some slight noises and then starts jittering ![]() |
Author: | Helihello [ Mon 16. Sep 2024 17:33:50 ] |
Post subject: | SOLVED: Tail servo jitter when turning on transmitter |
I came across this thread and I knew that only the green LED was lit on my FrSky R-XSR receiver when it is bound to my radio. So I realised I had accidentally put the receiver in CPPM mode during the binding process ![]() ![]() Now I noticed that, from time to time, my radio loses telemetry as described here, so I might downgrade the F.port firmware on the receiver from 2.1.1 to 2.1.0 and see whether that solves that issue. As indicated in my first post, the tail servo makes occasionally a crackling noise (a bit similar to a Geiger counter with low radiation levels). Is this normal or does it mean the servo is EOL ? |
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