Motor stopping issue

Esk8 Electronics Guides, Support, & General Questions
1

Greetings skaters!

And here I require your help again…
So after troubles with setting up the control and assembling the whole thing, I now have a different issue with one of my motors which slows down (and you can hear it doing so) a bit after starting. However, if I stop and press the throttle again, it works as normal, and then the same issue appears again.

I guess that it has to do something with VESC settings, but unfortunately, I have no clue with which ones :sweat_smile:

Here’s the video of what’s happening:

Thank you in advance for all help you can provide!

2

I’ve got no video here, just audio.

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4

fellow iphone user, please change ur camera setting to compatible

or else, no win / android user can see that video unless they download it, which im sure most won’t

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5

Correct, I will just close the thread and move on

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6

Oh damn, didn’t know that was a different format

7

@frame

Alright, Even though I’ve sent in the Dropbox link initially, it seems to upload under weird format still…

So here’s the YouTube link. Hopefully, this one will work just fine :sweat_smile:

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Noo…Dont close down the thread please!)
I’ve added a link to youtube now, seems to be working alright now (I hope)

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image
image800×450 37.4 KB

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10

Wow I’ve never seen an ESC do that. Does this happen under load too? What VESC are you running?

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11

If it’s not happening under load (when riding) it’s fine.

12

Enable traction control, see if the other motor keeps up.

No load full throttle test give little value besides maybe the idle current draw of the motors (lower=better)

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13

I’m using tenka and running VESC tool 3.00

14

I mean, I don’t think that’s the case cause when it slows down I can stop the motor with my hand and then it just jiggle (like it’s not getting enough power)

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15

How’s it run when ur on it?

16

It seems like you barely give any throttle at all and if that is the case, then I see no actual issue.

Motors are not identical… they are not driven identically. So one might barely spin and the other not, at the same throttle (only visible at very low throttle)

If you find it anoying I believe increasing the throttle deadband would fix this.

I have seen this happening at full throttle as well but then in think it was related to traction control as @linsus said.

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17

the jiggling is just essentially a virtual differential. It would be best to ride it and see if there is any actual perfomance dropoff. Also do what @linsus said.

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18

Yup! That was the reason for the weird behaviour of the motor! Thank you so much, now hopefully I’ll be able to use the board tomorrow)) :smiling_face:

19

@linsus, I Just got outside to try it out - your solution helped to get rid of the power loss; however, I have a very weird motor jiggle when I’m trying to start smoothly:

For some reason, when I’m either going forward or backward, I have this weird jiggle when I’m trying to start smoothly, but if I throttle a bit more, the board goes smoothly. Here’s from a side perspective:

Any ideas what it might be?

P.S - Sorry for interrupting you again @b264 ! Maybe you by any chance know the possible reason?

20

Looks normal, guessing you’re not using hallsensor or hfi? And if you have a slight roll this dsnt happen?

Also you dont really need traction control unless you want it. Board will behave normally under load

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21

Are those motors sensored? because thats what it looks like if you don’t use them.

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