Propeller Turns (or Stops) Intermittently Without Remote Action

Hello, I have an issue with my efoil. It no longer responds to the remote control. Initially, I thought the remote was faulty, so I bought a new one, but after reconfiguring it via VESC Tool, I encountered the same issue. I’m wondering if the problem might be with the receiver. Sometimes, when I press the trigger, nothing happens, and other times, the propeller spins on its own.

I noticed that the very first time I reconfigured the remote in the software, the blue PPM mapping bars were unstable, unlike in the tutorial video. It still worked for a while despite that. However, the problem has worsened, with greater instability in the bars, which affects the motor’s operation. I’m not sure if my explanation is clear, so I’ll include a video link that shows the issue more clearly. Thank you in advance for your help. https://youtu.be/2WhdRVtNJvk

nobody have an idea of my issue? Please try to give an advice, i don’t have idea how to fix?

What remote?

What vesc?

How is it connected?

Ever got wet?

Does it happen out of the water

Using UART or PPM

Are you getting data back to the remote?

Hi than you very much for your answer.

remote is: MTSKR1905WF (new)
Receiver: MTSRR1905 Receiver (old)
VESC is: VESC 75200 MAkerbase (new)
motor: Motor flipsky 65161 120Kv (new)
IT’s connected with Bluetooth I think I used the normal way to connect it (like in Maytech video)
Never been wet but I changed the VESC for a new one last year (but never been ride after changed)
UART or PPM (i’m not sure but i believe PPM ) , actually i followed Ludwig video about VESC to setup everything:https://www.youtube.com/watch?v=QaVPISP8BF4&t=1086s

And It worked well until the remote setup as you can see on my previous youtube link, the blue bar doesn’t stabilize and run the motor.

“Are you getting data back to the remote?” , i don’t know what do you mean exactly, sorry i’m a bit noob. :sweat_smile:

Hi mate have you had salt water anywhere near the reciever or in the board. When you are getting random things happening especially the motor turning on and off usually means bad connections between the reciever and esc. Replace the reciever and corrosion x all your connections.

Hi,yes I always have water there and the receiver is the last thing that I haven’t changed.
I gonna to change it thanks , i hope it will fix.

Thanks

So, I bought a new receiver that matches my Maytech remote because I thought the issue came from the receiver since it was the only non-new component left. I replaced the receiver, and the board worked normally for a week—seven sessions of about 35 minutes each. Then yesterday, I noticed the board wanted to move on its own. I placed it on the ground and saw that the propeller was spinning on its own again.

The problem came back as it was before replacing the receiver! I’m desperate because now I don’t know what to do anymore. I tried flashing the VESC firmware and reconfiguring everything from scratch, but the issue persists. When I turn off the remote, the motor stops spinning, but when I go into the PPM wizard (in VESC Tool), I can see the remote’s configuration bars moving erratically, sometimes spiking over 500%, and other times stabilizing.

What’s strange is that after a reconfiguration without setting it to the center position, everything seemed to work correctly, and the issue seemed resolved. I thought, great, left it like that, and charged the battery. After reconnecting everything post-charge, the problem returned worse than ever. When the spikes go above 500%, the remote doesn’t even drive the motor, and the motor doesn’t spin either.

I also noticed that when the board is turned off for a long time and I test it the next day, it works normally for a few minutes, but the problem comes back progressively. Initially, the propeller vibrates softly, then after a few minutes, it spins intermittently, then after more minutes, faster and less intermittently.

In short, it feels like there’s a ghost in my board that won’t let me enjoy it. I’m depressed because no one is helping me, and I’ve been troubleshooting for quite some time. I’ve spent more hours repairing this board than being on the water. In short, here I am, asking for help. If you have any ideas, I’m all ears, but I’m really out of ideas now.

I’ve noticed that when the 3 motor phase wires run close to anything electronically weird things can happen.

Are your 3 phase wires close to anything electronically?

No it’s happening on the sea,in my house or on the beach

Habe you checked if maybe your contacts show corrosion

Yes wright, put all electronics and antennas away from the 3 Phase wires. Another reason could be wrong esc motorconfig or appconfig. Trigger sensitivity for example. And throw the maytech remote away. Use flipsky vx3 for example or bremote.

I had a maytech remote where the spring went bad. It meant that the transmitter would send anything between 0-20% erratically which meant the motor would trigger. There’s two options, create a large dead and on the vesc which means it only sees throttle above the error. Or I’m my case I replaced the spring that ensured my remote remains at 0%.
Generally speaking you should always have a decent deadband though to cater to any faint trigger pulls by mistake.

Does it jump around when the TX is off too?
Do you maybe have a servo tester? If so, replace the receiver with it, and see if it’s any better on the test bench.

actually I rebuilt it last year because of cable corrosion that went like a powder. But Idk exactly what to search , I soldered the new receiver last week when i opened the VESC box all seems good. thanks for your advice. I may double check it btw.

Hi, yes i woud like to see if there is no other way to set up the esc with VESC tool. Perhaps a tip or use another way (not PPM wizard) actually i’m noob in it but I think now I can build another board from scratch with all problems I have had on this board :slight_smile: I just buy ( very expensive) the new maytech remote, I won’t throw it :sweat_smile:

With the remote turned off does it still spin by itself?

Yes, it jumps too when the TX is off. But today, I rode without any trouble. I really don’t understand what’s happening. Perhaps it happens when the battery is fully charged. I don’t know what a servo tester is. My thoughts are that the problem comes from the VESC (Makerbase), and I thought I could find a trick to solve the issue through the VESC Tool.

no, I’m turning off the remote when I’m on the sea for not loose the board when the problem arrives

yes yesterday I let the death-bandwidth at 15% that I usually reduce to 7% perhaps it solved my problem today but I have serious doubt about it. My remote is absolutely new

Ok good to know. At least its actually some signal coming from remote. Are you running ppm or uart? I am using uart on flipsky 75200 and vx3 and never experience this scary behaviour.