VESC-Tool 2.04: FW 5 >> A BIG STEP FORWARD

taz · May 9, 2020, 5:28am

I am putting this here but if you guys think it does not belong here, feel free to having it moved.

I had an interesting fault yesterday.
It appears one of the motors cut out at 53km/h which led to speed wobbles while climbing a hill at full throttle.
I managed to recover but soiled my pants a little.

No faults or anything on either of the vescs. Any ideas on what could have happened?

go to this: https://metr.at/r/riTWS?zoom_start=5159&zoom_end=5193 and activate individual amps etc.

@Trampa @Deodand I would appreciate your input guys.
FW 5.01

Titoxd1000 · May 9, 2020, 5:41am

That’s pretty dumb imo. I’ve been doing it all wrong this whole time, so you have to change settings twice… (Profiles blah blah)

taz · May 9, 2020, 5:45am

It may be inconvenient but not dumb.
Imagine if you had a 4wd and wanted to dial in different settings for front and back.
Wizards should apply settings to all motors.
After that it should be individual.

Scepterr · May 9, 2020, 5:48am

I think one possible improvement would be a persistent indicator showing which vesc(can id) is being configured and allow for can scan/activate in the left hand pullout that lets you reconnect, open app settings
so you don’t have to back to main page to switch vescs and then have to go back to the settings you were working on

Titoxd1000 · May 9, 2020, 5:49am

I do have a 4wd. The front and rear are separate systems. So i thought I was changing the front or the rear… So now I would have to change each esc individually.
How many people run 4wd all connected to one master??

taz · May 9, 2020, 5:53am

A few do.
Anyway as I said, I get the inconvenience of the current system but since we also need to be able to set each vesc individually a sort of advanced wizard would be needed.
VESC tool has come a long way since it started and it gets better and better. I am sure good ideas/suggestions are appreciated but there is only so much a small group of people can do.

Deodand · May 9, 2020, 7:54am

@taz thanks for the logs, bit annoying we don’t get individual duty cycle as well. It looks like you are around 93% duty when the potential bug occurs, so maybe one of your motors is hitting the 95% duty cycle ceiling abruptly and this sent you into oscillations? It shouldn’t really work this way, but more investigation is needed.

What ESC variant are you running?

taz · May 9, 2020, 7:55am

VESC 6+.

glyphiks · May 9, 2020, 8:00am

I’m running 4wd with two unities,one master, one slave. Same settings all round. So far so good.

taz · May 9, 2020, 10:18am

Now that you mention this, I had a similar situation last year on another board (my Trampa).
Again, I was punching it on a steep hill and the board wobbled as I was approaching top speed (no metr module and at the time the vesc tool did not support logging).
I was lucky and managed to Coleman slide to a stop.
I dismissed it at the time as I thought it was just a wobble due to road irregularities and I was only running springs at the front with no dampas.

Is there some setting I could make to alleviate the problem? Something like setting a profile with a top speed 2-3km/h less that the one at 95% duty cycle.

Both incidents were very similar. Very close to top speed, full or almost full throttle at a very steep incline.

Mr.Electronicist · May 9, 2020, 11:20am

@taz it might be a similar problem, but also might not be. I’m using two Vesc 6+’s on an ebike that uses two motors, a hub and an 80100 both powering the rear wheel. I matched their top speeds so they are only 1mph off from one another, but whenever I full throttle I get some sort of oscillation between the motors.

taz · May 9, 2020, 2:19pm

I changed this value from 100% to 85%.
I hope it will solve the problem as until I build a dyno, my only solution is to gun it and hope I don’t die

Deodand · May 9, 2020, 2:35pm

Yes that is the new setting that addresses this. Sincere thank you for giving it a go, gear up! Make sure you set it on both motors also (a reminder for anyone reading that wanted to try the same thing)

Venom121212 · May 9, 2020, 2:35pm

Yes… Definitely remember to do this haha

Still no issues to report after sorting that out.

ma-j-sterelektron · May 9, 2020, 4:59pm

In the end problem was the connection of phases to one motor, little soldering work solved everything.

I twisted the canbus wires anyway, for reliability.

Titoxd1000 · May 9, 2020, 6:21pm

Yeah same, I have all settings the same for 4wd or I thought. If you want to change one setting (on vesc tool) you have to do it four times lol

b264 · May 9, 2020, 8:43pm

I used to do this on Ackmaniac and it worked fantastic. I’ve never yet been able to replicate that in the new Vedder firmwares.

It also can increase your range significantly to slightly limit the top speed, instead of everything being based on current limiting.

linsus · May 9, 2020, 9:01pm

I have three modes.
No limits with high current.
250W/motor 20km/h (legal)
“Hey dude can I try your board” mode, 5km/h

b264 · May 9, 2020, 9:20pm

Just say no You wouldn’t let them drive your new sports car? Then they don’t ride these, either.

Titoxd1000 · May 10, 2020, 2:52am

Happened to me today. At the worst time chasing down a evolve, uphill almost full throttle, instant speed wobbles out of nowhere. IDK how I stayed on the board. It felt like one of the motors just cut out.
I’ll have to try that setting @Deodand recommend. Lmk if it works for you