Hi, I’m running a FLIPSKY vx3 pro remote on uart and go-foc g300 with a 65161 motor. The throttle percentage aligns with what the vesc tool says but the motor goes from 0-100% within between 20-30% throttle. I can get it to work fine with ppm but with uart the throttle control is all writhing 10% throttle change.
I have tried a whole heap of things, running sensorless, hfi, changing the throttle curve and am not getting anywhere. Any help would be greatly appreciated!
Is this in the water with load or just free spinning on the bench?
I had to use PPM+UART to get the VX3 pro working or PPM.
UART alone did not work for me.
But I cannot really remember what the problem was.
It’s just spinning on the bench but I have tried it in the water and it is the same, the tow boogie just gets launched
Thanks I’ll see how I go, if I cant get the UART working I’ll go back to PPM when my new receiver arrives. The PPM on the receiver stop working the other day, next one I get I’m go to use conformal coating to see if it lasts longer. I have had mixed results with these controllers and receivers.
Lots of posts where that happens when out of water but have not heard of this when in water.
Might be a faulty remote, configuration problem ….
The VX3 has a mode button that lets you flip from default H to M or L. Might want to try that to see if it affects the fault
Try setting the throttle curve to exponential and max it out. The range of your throttle should increase. Another solution might be changing the throttle to control the duty cycle instead of the current.
I’m pretty sure it’s a config problem, just can’t get to the bottom oof it. I’ll try and change to duty cycle output, that’s how I got it working right with pwm control. I have stuffed around with the throttle curve a fair bit, really just shifted the issue up the percentage range. Is getting the current sense figure quite important for current control? Seem like a given, I’ll put a clamp meter on it to see if that is measuring accurately as well.
There were some cables for uart with pins swapped. I forget but I had that when I first started. I could use ppm but uart would not even communicate until I swapped a pin. SOrry I forget but the flipsky diagram was correct.
thanks windego, I will have a go at this. Just to sort of complete this thread, I ended up just using ppm without uart, it was the only way I can get this working properly. In the end I had a faulty receiver. Just to note though and this was really quite dangerous the PPM part of the receiver had failed but was giving random signals out to the motor controller every once in a while which meant with the controller turned off sometimes the prop would spin! Very dangerous failure on this one, goes to show if the power is not off dont assume the prop wont spin!
Just had a handy learning as well, when using ppm the motor would “chug” on start sometimes, I ended up finding it was when I pulled the throttle on full without easing into it, the fix for me was to increase the throttle ramp up time from .4sec to .7sec, now the motor starts smoothly every time, yeay!