What is your battery voltage? 12S 50.4V
What is your motor Kv? 190Kv
What is your wheel diameter?
How many poles does your motor have? 14
What is your motor pulley/gear/sprocket tooth count?
What is your wheel pulley/gear/sprocket tooth count?
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so just change it back to 100000 -100000 and 80%?
155m 14t and 60t
would this also mean that it will cut out when it throttles too?
also after fixing the remote settings it shows it going 36
this is the video i used to help me set up 2021 FOCBOX Setup Guide - YouTube
You want the ERPM setting to be higher than your motor can physically turn with no load (ie not speed limited by the ERPM setting).
How did I know it was going to be MBoards
thank you guys for help im not trying to argue just trying to understand : )
how do i figure that out?
Your maximum speeds the machine will achieve under its own power with the wheels lifted off the ground are 65km/h (40.6mph) at 67032erpm.
With a rider at an average charge on flat ground, that’s closer to 56km/h (34.8mph) at 57456erpm.
So even the 80kerpm number will likely never be reached under any circumstances. But like I said
Why chance it? Just click the “defaults” buttons for those fields and move on.
MBoards is not a very informative resource anyway.
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If you scroll down into the comments, it says this is unsafe advice.
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so your saying this is like a safety feature to cut off your motors if they go to fast?
is there a way to just reset that setting or do i have to reset all the settings and go back and redo them?
VESC gives you all the tools you need to kill yourself if you use it wrong. It’s also not made strictly for electric skateboards. And, it’s also one of the least user-friendly interfaces I’ve ever seen. But it does what it does. VESC gonna VESC.
This is not so much a safety feature, no more than being able to turn the steering wheel is a safety feature in a car. It’s just a tool the machine offers if you need it to accomplish whatever goal you’re trying to accomplish. If I was building an airplane using propellers and the highest Kv motor I could possibly use, I would use that field for sure. Building an esk8, nah I have never needed it. I’ve thought I needed it before, but I actually didn’t.
Listening to advice from folks who have used it before and who don’t have anything to sell you is going to be a key skill.
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im def changing it back lol
You may already know this stuff but based on the questions I feel like it’s worth starting with the basics.
Electrical RPM (eRPM) is motor RPM multiplied by 7 for a standard esk8 outrunner motor.
Motor RPM under throttle is limited by voltage.
If you know your battery voltage, motor kv, gear ratio and wheel diameter, you can both calculate your top speed and your motor RPMs at any speed (there is a calculator to do this on the site if you look at the top of the page).
Let’s say your top speed on flat ground spins the motor up to 70,000 eRPMs and you have it set to 80,000 eRPMs in the VESC tool. No issues here. Nothing will happen and all is well.
Let’s say you start going downhill faster than your top speed under throttle, and your wheels spin the motor up to 90,000 eRPMs. Still no issues here until you go to hit the brakes. The VESC simply won’t activate those brakes because you are over the max eRPM setting in that moment. You will need to slow down to less than 80,000 before they will work again. This could be bad.
The 80% setting is so the VESC reduces power from 80% to 100% of the eRPM setting (64,000-80,000 in this case) so it’s not an abrupt power cut-off. This helps during acceleration if you manage to reach those eRPMs, but not during braking where gravity can spin your motor above the setting.
The focbox eRPM limit (before it explodes) is somewhere between 80,000 and 100,000 eRPMs based on marketing literature but there aren’t many tests. This is probably a moot point if your motor under voltage can never reach more than say 50,000 eRPMs
This is why people above are saying you should leave the eRPM settings stock, and adjust duty cycle to limit speed.
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sorry wasnt trying to piss anyone off lol
*I should add that I’m not 100% certain that changing the duty cycle limit won’t affect the brakes.
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