Wheels brake locking in FOC right before dead stop

ESK8 Electronics
41

#TorqueMatterstoo

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42

It does, and I built a board with this same gear ratio and was not happy with it. But there are some skinny folks out there that can use it and still get enough torque to go.

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43

Fair Iā€™m 180 and even on 16/36 Iā€™m dien. Bouts get some 44ā€™s

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single motor or dual?

45

Dual 6374ā€™s

Edit: mine isnā€™t slow but coming from an evolve i like a little bit of a kick. And i use tb vescs so i limit the initial Kick a little bit with the throttle curves so i donā€™t pop my babies

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46

alternative setup if ran with no brakes in settings, just came across thisā€¦

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47

I can dig that. You should be safe at 60/-40/60/-12. Try that and see if its any better.

48

Will give it a pop bro! Cheers!

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49

Same problem here, dual foc, sensored, foc mode. Breaks abruptly just before stopping from rolling resistance alone. Itā€™s annoying.

50

see my post at

and how i solved it

Cheers

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51

For me it doesnā€™t happen, or if it happen Iā€™m so used that I donā€™t usually notice

80mm wheels, 14/34 gearing and 190kv 5055

Could it be VESC 6 vs FOCBOX? Since the later has only two shunts? What are you guys running?

52

Could you share your drive setup? E.g. gearing, wheel size, etc?

I noticed you were running FOC, this hack fixed it for FOC as well?

Thanks in advance, really annoying to be kicked off my board.

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yeah FOC with canbus dual 150KV motors 15T motor cog 66T wheel cog 175 wheels

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54

Thanks I applied the hackā€¦ Will report back once I have some resultsā€¦

Whatā€™s your motor and batt min settings?

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55

I did some testing on a single motor board. 90mm Flywheel, the insta-stop isnā€™t present., 107mm Flywheels insta-stop is there but very minimal. 6in 6 shooters itā€™s def there. 7.5 in most definitely there. Seems itā€™s all related to wheel size vs low end RPM.

56

Exact same setup just changing wheel size?

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57

That looks interesting. Good job on the workaround :+1:. And I really donā€™t get why VESC tool doesnā€™t let you modify this parameter. I posted a feature request on Benjaminā€™s forum: https://www.vesc-project.com/node/480 Unless thereā€™s something that weā€™re missing here why this parameter should not be changed for FOC, it should be a 5 min job for him to add it for the next VESC tool release. It was probably just forgotten in the rewriting of the toolā€¦

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58

@SkaterBoy58 This is a great find man!

Thanks a lot for posting the solution, Iā€™ll try as soon as I have time later this week. This is exciting!

@Ackmaniac would you please include this into a future FW update?

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59

From the way that @SkaterBoy58 was able to fix it seems firmware already has it implemented. Itā€™s really just adding the button to VESC tool.

60

Has only an effect in BLDC but not in FOC mode. I can try to expose the value. But no time this weekend. Maybe in the next week.

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